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Knall EN, Knaut CM, Bekenstein R, Assumpcao DR, Stroganov PL, Gong W, Huan YQ, Stas PJ, Machielse B, Chalupnik M, Levonian D, Suleymanzade A, Riedinger R, Park H, Lončar M, Bhaskar MK, Lukin MD. Efficient Source of Shaped Single Photons Based on an Integrated Diamond Nanophotonic System. PHYSICAL REVIEW LETTERS 2022; 129:053603. [PMID: 35960557 DOI: 10.1103/physrevlett.129.053603] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 06/30/2022] [Indexed: 06/15/2023]
Abstract
An efficient, scalable source of shaped single photons that can be directly integrated with optical fiber networks and quantum memories is at the heart of many protocols in quantum information science. We demonstrate a deterministic source of arbitrarily temporally shaped single-photon pulses with high efficiency [detection efficiency=14.9%] and purity [g^{(2)}(0)=0.0168] and streams of up to 11 consecutively detected single photons using a silicon-vacancy center in a highly directional fiber-integrated diamond nanophotonic cavity. Combined with previously demonstrated spin-photon entangling gates, this system enables on-demand generation of streams of correlated photons such as cluster states and could be used as a resource for robust transmission and processing of quantum information.
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Affiliation(s)
- E N Knall
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA
| | - C M Knaut
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - R Bekenstein
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
- Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - D R Assumpcao
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA
| | - P L Stroganov
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - W Gong
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Y Q Huan
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - P-J Stas
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - B Machielse
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
- AWS Center for Quantum Computing, Pasadena, California 91125, USA
| | - M Chalupnik
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - D Levonian
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
- AWS Center for Quantum Computing, Pasadena, California 91125, USA
| | - A Suleymanzade
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - R Riedinger
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
- Institut für Laserphysik und Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany
| | - H Park
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA
| | - M Lončar
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA
| | - M K Bhaskar
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
- AWS Center for Quantum Computing, Pasadena, California 91125, USA
| | - M D Lukin
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
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2
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Ghosh Dastidar M, Thekkooden I, Nayak PK, Praveen Bhallamudi V. Quantum emitters and detectors based on 2D van der Waals materials. NANOSCALE 2022; 14:5289-5313. [PMID: 35322836 DOI: 10.1039/d1nr08193d] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Light plays an essential role in our world, with several technologies relying on it. Photons will also play an important role in the emerging quantum technologies, which are primed to have a transformative effect on our society. The development of single-photon sources and ultra-sensitive photon detectors is crucial. Solid-state emitters are being heavily pursued for developing truly single-photon sources for scalable technology. On the detectors' side, the main challenge lies in inventing sensitive detectors operating at sub-optical frequencies. This review highlights the promising research being conducted for the development of quantum emitters and detectors based on two-dimensional van der Waals (2D-vdW) materials. Several 2D-vdW materials, from canonical graphene to transition metal dichalcogenides and their heterostructures, have generated a lot of excitement due to their tunable emission and detection properties. The recent developments in the creation, fabrication and control of quantum emitters hosted by 2D-vdW materials and their potential applications in integrated photonic devices are discussed. Furthermore, the progress in enhancing the photon-counting potential of 2D material-based detectors, viz. 2D photodetectors, bolometers and superconducting single-photon detectors functioning at various wavelengths is also reported.
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Affiliation(s)
- Madhura Ghosh Dastidar
- 2D Materials Research and Innovation Group, Micro Nano and Bio-Fluidics Group, Quantum Centers in Diamond and Emerging Materials (QuCenDiEM) Group, Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
| | - Immanuel Thekkooden
- Quantum Centers in Diamond and Emerging Materials (QuCenDiEM) Group, Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
| | - Pramoda K Nayak
- 2D Materials Research and Innovation Group, Micro Nano and Bio-Fluidics Group, Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India.
| | - Vidya Praveen Bhallamudi
- Quantum Centers in Diamond and Emerging Materials (QuCenDiEM) Group, Departments of Physics and Electrical Engineering, Indian Institute of Technology Madras, Chennai 600036, India.
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3
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Javid UA, Ling J, Staffa J, Li M, He Y, Lin Q. Ultrabroadband Entangled Photons on a Nanophotonic Chip. PHYSICAL REVIEW LETTERS 2021; 127:183601. [PMID: 34767430 DOI: 10.1103/physrevlett.127.183601] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 09/20/2021] [Indexed: 06/13/2023]
Abstract
The development of quantum technologies on nanophotonic platforms has seen momentous progress in the past decade. Despite that, a demonstration of time-frequency entanglement over a broad spectral width is still lacking. Here we present an efficient source of ultrabroadband entangled photon pairs on a periodically poled lithium niobate nanophotonic waveguide. Employing dispersion engineering, we demonstrate a record-high 100 THz (1.2 μm-2 μm) generation bandwidth with a high efficiency of 13 GHz/mW and excellent noise performance with the coincidence-to-accidental ratio exceeding 10^{5}. We also measure strong time-frequency entanglement with over 98% two-photon interference visibility.
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Affiliation(s)
- Usman A Javid
- Institute of Optics, University of Rochester, Rochester, New York 14627, USA
| | - Jingwei Ling
- Department of Electrical and Computer Engineering, University of Rochester, Rochester, New York 14627, USA
| | - Jeremy Staffa
- Institute of Optics, University of Rochester, Rochester, New York 14627, USA
| | - Mingxiao Li
- Department of Electrical and Computer Engineering, University of Rochester, Rochester, New York 14627, USA
| | - Yang He
- Department of Electrical and Computer Engineering, University of Rochester, Rochester, New York 14627, USA
| | - Qiang Lin
- Institute of Optics, University of Rochester, Rochester, New York 14627, USA
- Department of Electrical and Computer Engineering, University of Rochester, Rochester, New York 14627, USA
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Su J, Cui L, Li J, Liu Y, Li X, Ou ZY. Versatile and precise quantum state engineering by using nonlinear interferometers. OPTICS EXPRESS 2019; 27:20479-20492. [PMID: 31510141 DOI: 10.1364/oe.27.020479] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 06/14/2019] [Indexed: 05/19/2023]
Abstract
The availability of photon states with well-defined temporal modes is crucial for photonic quantum technologies. Ever since the inception of generating photonic quantum states through pulse pumped spontaneous parametric processes, many exquisite efforts have been put on improving the modal purity of the photon states to achieve single-mode operation. However, because the nonlinear interaction and linear dispersion are often mixed in parametric processes, limited successes have been achieved so far only at some specific wavelengths with sophisticated design. In this paper, we resort to a different approach by exploiting an active filtering mechanism originated from interference fringe of nonlinear interferometer. The nonlinear interferometer is realized in a sequential array of nonlinear medium, with a gap in between made of a linear dispersive medium, in which the precise modal control is realized without influencing the phase matching of the parametric process. As a proof-of-principle demonstration of the capability, we present a photon pairs source using a two-stage nonlinear interferometer formed by two identical nonlinear fibers with a standard single mode fiber in between. The results show that spectrally correlated two-photon state via four wave mixing in a single piece nonlinear fiber is modified into factorable state and heralded single-photons with high modal purity and high heralding efficiency are achievable. This novel quantum interferometric method, which can improve the quality of the photon states in almost all the aspects such as modal purity, heralding efficiency, and flexibility in wavelength selection, is proved to be effective and easy to realize.
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Zhang Y, Spiniolas R, Shinbrough K, Fang B, Cohen O, Lorenz VO. Dual-pump approach to photon-pair generation: demonstration of enhanced characterization and engineering capabilities. OPTICS EXPRESS 2019; 27:19050-19061. [PMID: 31252837 DOI: 10.1364/oe.27.019050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 05/28/2019] [Indexed: 06/09/2023]
Abstract
We experimentally study the generation of photon pairs via spontaneous four-wave mixing with two distinct laser pulses. We find that the dual-pump technique enables new capabilities: 1) a new characterization methodology to measure noise contributions, source brightness and photon-collection efficiencies directly from raw photon-count measurements; 2) an enhanced ability to generate heralded single photons in a pure quantum state; and 3) the ability to derive upper and lower bounds on heralded-photon quantum state purity from measurements of photon-number statistics even in the presence of noise. Such features are highly valuable in photon-pair sources for quantum applications.
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Li XY, Zhu F, Qin L, Zhang JS, Ren MZ, An JM, Zhang W, You LX, Wang Z, Xu XS. Two-photon interferences on a silica-on-silicon chip with telecom-band photon pairs generated in a fiber. OPTICS EXPRESS 2018; 26:29471-29481. [PMID: 30470110 DOI: 10.1364/oe.26.029471] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 09/09/2018] [Indexed: 06/09/2023]
Abstract
We report two-photon interferences on a silica-on-silicon chip of Mach-Zehnder interferometer using telecommunication-band correlated photon pairs. The photon pairs were generated by spontaneous four-waving mixing process in a dispersion-shifted fiber. The integrated chip, which was fabricated by standard silica-on-silicon planar lightwave circuit technology, contained a Mach-Zehnder interferometer with a thermo-optic phase shifter. The insertion loss of the interferometer was less than 1 dB. We demonstrated two-photon interferences with both degenerate- and non-degenerate-frequency photon pairs on the Mach-Zehnder interferometer chip. A high fringe visibility was achieved in the interference with nondegenerate-frequency photons. Properties of quantum interference were demonstrated in the interference with degenerate-frequency photon pairs, which is an important way to manipulate the quantum state. These results show great potential of silica-on-silicon photonic chips in applications for the fiber-chip scheme in quantum networks.
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7
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Kuo PS, Pelc JS, Langrock C, Fejer MM. Using temperature to reduce noise in quantum frequency conversion. OPTICS LETTERS 2018; 43:2034-2037. [PMID: 29714739 PMCID: PMC6038917 DOI: 10.1364/ol.43.002034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 03/22/2018] [Indexed: 06/08/2023]
Abstract
Quantum frequency conversion is important in quantum networks to interface nodes operating at different wavelengths and to enable long-distance quantum communication using telecommunications wavelengths. Unfortunately, frequency conversion in actual devices is not a noise-free process. One main source of noise is spontaneous Raman scattering, which can be reduced by lowering the device operating temperature. We explore frequency conversion of 1554 nm photons to 837 nm using a 1813 nm pump in a periodically poled lithium niobate waveguide device. By reducing the temperature from 85°C to 40°C, we show a three-fold reduction in dark count rates, which is in good agreement with theory.
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Affiliation(s)
- Paulina S. Kuo
- Information Technology Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, USA
| | - Jason S. Pelc
- E. L. Ginzton Laboratory, Stanford University, 348 Via Pueblo Mall, Stanford, California 94305, USA
| | - Carsten Langrock
- E. L. Ginzton Laboratory, Stanford University, 348 Via Pueblo Mall, Stanford, California 94305, USA
| | - M. M. Fejer
- E. L. Ginzton Laboratory, Stanford University, 348 Via Pueblo Mall, Stanford, California 94305, USA
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8
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Shukhin A, Kalachev A. Spontaneous four-wave mixing in optical nanofibers at low temperatures. EPJ WEB OF CONFERENCES 2017. [DOI: 10.1051/epjconf/201716103016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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9
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Yamamoto Y, Oohata G, Mizoguchi K. Quantitative characterization of highly efficient correlated photon-pair source using biexciton resonance. OPTICS EXPRESS 2016; 24:6034-6040. [PMID: 27136797 DOI: 10.1364/oe.24.006034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A high efficiency method for the generation of correlated photon pairs accompanied by reliable means to characterize the efficiency of that process is needed in the study of entangled states, which have important potential applications in quantum information and quantum communication. In this study, we report the first characterization of the efficiency of generation of correlated photon pairs emitted from a CuCl single crystal using the biexciton-resonance hyper-parametric scattering (RHPS) method which is the highly efficient method of generation of correlated photon pairs. In order to characterize the generation efficiency and signal-to-noise ratio of correlated photon pairs using this method, we investigated the pump power dependence on the photon counting rate and coincidence counting rate under resonant excitation. The pump power dependence shows that the power characteristic of the photon counting rates changes from linear to quadratic dependence of the pump power. This behavior represents a superposition of contributions from correlated photon pairs and non-correlated photons. The analysis of the pump power dependence shows that one photon-pair is produced by a pump pulse with 2 x 106 photons. Moreover, the generation efficiency of this method obtained by calculating the number of generated photon pairs per pump power is comparable to that of several methods based on the χ(3) parametric process.
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10
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Dong S, Yu L, Zhang W, Wu J, Zhang W, You L, Huang Y. Generation of hyper-entanglement in polarization/energy-time and discrete-frequency/energy-time in optical fibers. Sci Rep 2015; 5:9195. [PMID: 25779686 PMCID: PMC4361880 DOI: 10.1038/srep09195] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 02/06/2015] [Indexed: 11/17/2022] Open
Abstract
In this paper, a generation scheme for telecom band hyper-entanglement is proposed and demonstrated based on the vector spontaneous four wave mixing (SFWM) processes in optical fibers. Two kinds of two-photon states are generated, one is hyper-entangled in the degree of freedoms (DOFs) of energy-time and polarization, the other is hyper-entangled in DOFs of energy-time and discrete-frequency. Experiments of Franson-type interference, two-photon interference under non-orthogonal polarization bases and spatial quantum beating are realized to demonstrate the entanglement in energy-time, polarization and frequency, respectively. This scheme provides a simple way to realize telecom band hyper-entanglement, which has potential for large geographic-scale applications of quantum communication and quantum information over optical fibers.
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Affiliation(s)
- Shuai Dong
- Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China
| | - Lingjie Yu
- Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China
| | - Wei Zhang
- Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China
| | - Junjie Wu
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
| | - Weijun Zhang
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
| | - Lixing You
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
| | - Yidong Huang
- Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China
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11
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Ma T, Zhou Q, Zhang W, Huang Y, Cui X, Lu M, Zhou B. 1.5 μm orthogonally polarized dual-output heralded single photon source based on optical fibers with birefringence. OPTICS EXPRESS 2013; 21:15364-15372. [PMID: 23842322 DOI: 10.1364/oe.21.015364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this paper, a heralded single photon source (HSPS) at 1.5 μm with two independent orthogonally polarized outputs is realized based on a piece of polarization maintaining dispersion shifted fiber (PM-DSF). The HSPS is based on two scalar spontaneous four wave mixing (SFWM) processes along the two fiber polarization axes, while two vector SFWM processes are suppressed due to the high birefringence in the PM-DSF. The preparation efficiencies of the two independent outputs are about 73.7% and 69.1%, respectively, under a second-order correlation function g(2)(0) of 0.059. The indistinguishability between the two independent heralded single photons is demonstrated by Hong-Ou-Mandel (HOM) interference with a visibility of 78.9%, showing its great potential in quantum optics experiments and applications of quantum information.
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Affiliation(s)
- Tianyi Ma
- Department of Electronic Engineering, Tsinghua University, Tsinghua National Laboratory for Information Science and Technology, Beijing 100084, China
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12
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Bienfang J, Fan J, Migdall A, Polyakov S. Introduction. EXPERIMENTAL METHODS IN THE PHYSICAL SCIENCES 2013. [DOI: 10.1016/b978-0-12-387695-9.00001-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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13
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Collins MJ, Clark AS, He J, Choi DY, Williams RJ, Judge AC, Madden SJ, Withford MJ, Steel MJ, Luther-Davies B, Xiong C, Eggleton BJ. Low Raman-noise correlated photon-pair generation in a dispersion-engineered chalcogenide As2S3 planar waveguide. OPTICS LETTERS 2012; 37:3393-3395. [PMID: 23381268 DOI: 10.1364/ol.37.003393] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We demonstrate low Raman-noise correlated photon-pair generation in a dispersion-engineered 10 mm As2S3 chalcogenide waveguide at room temperature. We show a coincidence-to-accidental ratio (CAR) of 16.8, a 250 times increase compared with previously published results in a chalcogenide waveguide, with a corresponding brightness of 3×10(5) pairs·s(-1)·nm(-1) generated at the chip. Dispersion engineering of our waveguide enables photon passbands to be placed in the low spontaneous Raman scattering (SpRS) window at 7.4 THz detuning from the pump. This Letter shows the potential for As2S3 chalcogenide to be used for nonlinear quantum photonic devices.
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Affiliation(s)
- Matthew J Collins
- Centre for Ultrahigh Bandwidth Devices for Optical Systems (CUDOS), Institute of Photonics and Optical Science (IPOS), School of Physics, University of Sydney, NSW 2006, Australia
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14
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Arahira S, Kishimoto T, Murai H. 1.5-μm band polarization entangled photon-pair source with variable Bell states. OPTICS EXPRESS 2012; 20:9862-9875. [PMID: 22535079 DOI: 10.1364/oe.20.009862] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this paper we report a polarization-entangled photon-pair source in a 1.5-μm band which can generate arbitrary entangled states including four maximum entangled states (Bell states) by using cascaded optical second nonlinearities (second-harmonic generation and the following spontaneous parametric down conversion) in a periodically poled LiNbO(3) (PPLN) ridge-waveguide device. Exchange among the Bell states was achieved by using an optical phase bias compensator (OPBC) in a Sagnac loop interferometer and a half-wave plate outside the loop for polarization conversion. Quantitative evaluation was made on the performance of the photon-pair source through the experiments of two-photon interferences, quantum state tomography, and test of violation of Bell inequality. We observed high visibilities of 96%, fidelities of 97%, and 2.71 of the S parameter in inequality of Clauser, Horne, Shimony, and Holt (CHSH). The experimental values, including peak coincidence counts in the two-photon interference (approximately 170 counts per second), remained almost unchanged in despite of the exchange among the Bell states. They were also in good agreement with the theoretical assumption from the mean number of the photon-pairs under the test (0.04 per pulse). More detailed experimental studies on the dependence of the mean number of the photon-pairs revealed that the quantum states were well understood as the Werner state.
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Affiliation(s)
- Shin Arahira
- Corporate Research & Development Center, Oki Electric Industry Co., Ltd., 1-16-8 Chuou, Warabi-shi, Saitama 335-8510, Japan.
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Arahira S, Namekata N, Kishimoto T, Yaegashi H, Inoue S. Generation of polarization entangled photon pairs at telecommunication wavelength using cascaded χ2 processes in a periodically poled LiNbO3 ridge waveguide. OPTICS EXPRESS 2011; 19:16032-16043. [PMID: 21934967 DOI: 10.1364/oe.19.016032] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We report the generation of high-purity correlated photon-pairs and polarization entanglement in a 1.5 μm telecommunication wavelength-band using cascaded χ((2)):χ((2)) processes, second-harmonic generation (SHG) and the following spontaneous parametric down conversion (SPDC), in a periodically poled LiNbO(3) (PPLN) ridge-waveguide device. By using a PPLN module with 600%/W of the SHG efficiency, we have achieved a coincidence-to-accidental ratio (CAR) higher than 4000 at 7.45×10(-5) of the mean number of the photon-pair per pulse. We also demonstrated that the maximum reach of the CAR was truly dark-count-limited by the single-photon detectors used here. This indicates that the fake (noise) photons were negligibly small in this system, even though the photon-pairs, the Raman noise photons, and the pump photons were in the same wavelength band. Polarization entangled photon pairs were also generated by constructing a Sagnac-loop-type interferometer which included the PPLN module and an optical phase-difference compensator to observe maximum entanglement. We achieved two-photon interference visibilities of 99.6% in the H/V basis and 98.7% in the diagonal basis. The peak coincidence count rate was approximately 50 counts per second at 10(-3) of the mean number of the photon-pair per pulse.
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Affiliation(s)
- Shin Arahira
- Corporate Research & Development Center, Oki Electric Industry Co., Ltd., 1-16-8 Chuou, Warabi-shi, Saitama 335-8510, Japan.
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16
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Eisaman MD, Fan J, Migdall A, Polyakov SV. Invited review article: Single-photon sources and detectors. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2011; 82:071101. [PMID: 21806165 DOI: 10.1063/1.3610677] [Citation(s) in RCA: 297] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We review the current status of single-photon-source and single-photon-detector technologies operating at wavelengths from the ultraviolet to the infrared. We discuss applications of these technologies to quantum communication, a field currently driving much of the development of single-photon sources and detectors.
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Affiliation(s)
- M D Eisaman
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
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17
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Zhou Q, Zhang W, Cheng JR, Huang YD, Peng JD. Noise performance comparison of 1.5 microm correlated photon pair generation in different fibers. OPTICS EXPRESS 2010; 18:17114-17123. [PMID: 20721100 DOI: 10.1364/oe.18.017114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In this paper, the noise performances of 1.5 microm correlated photon pair generation based on spontaneous four wave-mixing in three types of fibers, i.e., dispersion shifted fiber, traditional highly nonlinear fiber and highly nonlinear microstructure fiber are investigated experimentally. Result of the comparison shows that highly nonlinear microstructure fiber has the lowest Raman noise photon generation rate among the three types of fibers while correlated photon pair generation rate is the same. Theoretical analysis indicates that the noise performance is determined by the nonlinear index and Raman response of the material in fiber core. The Raman response rises with increasing doping level, while, for the nonlinear index, the impact of doping level is weak. As a result, highly nonlinear microstructure fiber with pure silica core has the best noise performance and great potential in practical sources of correlated photon pairs and heralded single photons.
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Affiliation(s)
- Qiang Zhou
- Department of Electronic Engineering, Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing 100084, China
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18
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Xiong C, Helt LG, Judge AC, Marshall GD, Steel MJ, Sipe JE, Eggleton BJ. Quantum-correlated photon pair generation in chalcogenide As2S3 waveguides. OPTICS EXPRESS 2010; 18:16206-16216. [PMID: 20721006 DOI: 10.1364/oe.18.016206] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We theoretically investigate the generation of quantum-correlated photon pairs through spontaneous four-wave mixing in chalcogenide As(2)S(3) waveguides. For reasonable pump power levels, we show that such photonic-chip-based photon-pair sources can exhibit high brightness (approximately 1 x 10(9) pairs/s) and high correlation (approximately 100) if the waveguide length is chosen properly or the waveguide dispersion is engineered. Such a high correlation is possible in the presence of Raman scattering because the Raman profile exhibits a low gain window at a Stokes shift of 7.4 THz, though it is constrained due to multi-pair generation. As the proposed scheme is based on photonic chip technologies, it has the potential to become an integrated platform for the implementation of on-chip quantum technologies.
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Affiliation(s)
- C Xiong
- Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), Institute for Photonics and Optical Science (IPOS), School of Physics, University of Sydney, Australia.
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Smith BJ, Mahou P, Cohen O, Lundeen JS, Walmsley IA. Photon pair generation in birefringent optical fibers. OPTICS EXPRESS 2009; 17:23589-23602. [PMID: 20052068 DOI: 10.1364/oe.17.023589] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We study both experimentally and theoretically the generation of photon pairs by spontaneous four-wave mixing (SFWM) in standard birefringent optical fibers. The ability to produce a range of two-photon spectral states, from highly correlated (entangled) to completely factorable, by means of cross-polarized birefringent phase matching, is explored. A simple model is developed to predict the spectral state of the photon pair which shows how this can be adjusted by choosing the appropriate pump bandwidth, fiber length and birefringence. Spontaneous Raman scattering is modeled to determine the tradeoff between SFWM and background Raman noise, and the predicted results are shown to agree with experimental data.
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Affiliation(s)
- Brian J Smith
- Centre for Quantum Technologies, National University of Singapore 3 Science Drive 2, 117543 Singapore, Singapore.
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Takesue H, Miquel B. Entanglement swapping using telecom-band photons generated in fibers. OPTICS EXPRESS 2009; 17:10748-10756. [PMID: 19550472 DOI: 10.1364/oe.17.010748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report the first entanglement swapping experiment using entangled photon-pair sources based on spontaneous four-wave mixing (SFWM). The 1.5-microm band entangled photon pairs generated by SFWM in two independent 500-m dispersion shifted fibers exhibited quantum interference, thanks to the negligible walk-off between the pump and photon pairs. The use of 500-MHz gated-mode InGaAs/InP avalanche photodiodes based on the sine-wave gating technique increased the fourfold coincidence rate. As a result, the formation of an entanglement between photons from independent sources was successfully observed.
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Affiliation(s)
- Hiroki Takesue
- NTT Basic Research Laboratories, NTT Corporation, Atsugi, Japan.
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Dyer SD, Baek B, Nam SW. High-brightness, low-noise, all-fiber photon pair source. OPTICS EXPRESS 2009; 17:10290-10297. [PMID: 19506682 DOI: 10.1364/oe.17.010290] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We demonstrate an all-fiber photon pair source for the critical telecom C-band. We achieve high pair generation rates in excess of 10 MHz while maintaining coincidence-to-accidental ratios (CARs) greater than 100. This is one of the brightest and lowest-noise photon pair sources ever demonstrated. We achieve the high pair rate through CW-pumped spontaneous four-wave mixing in dispersion-shifted fiber. We achieve the high CAR by cooling the fiber to 4 K to suppress the Raman generation and detecting the photons with low jitter and low dark count superconducting single-photon detectors.
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Chen J, Pearlman AJ, Ling A, Fan J, Migdall AL. A versatile waveguide source of photon pairs for chip-scale quantum information processing. OPTICS EXPRESS 2009; 17:6727-6740. [PMID: 19365501 DOI: 10.1364/oe.17.006727] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We demonstrate a bright, bandwidth-tunable, quasi-phase-matched single-waveguide source generating photon pairs near 900 nm and 1300 nm. Two-photon coincidence spectra are measured at a range of operating temperatures of a periodically-poled KTiOPO(4) (PPKTP) waveguide, which supports both type-0 and type-II spontaneous parametric down-conversion. We map out relative contributions of two-photon to one-photon fluorescence for a range of operating parameters. Such a versatile device is highly promising for future chip-scale quantum information processing.
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Affiliation(s)
- Jun Chen
- Optical Technology Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899-8441, USA.
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