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Ramos-Israde E, Garay-Palmett K, Cudney RS. Randomly aperiodically poled LiNbO 3 crystal design by Monte Carlo-Metropolis with simulated annealing optimization for ultrabroadband photon pair generation. APPLIED OPTICS 2021; 60:10587-10593. [PMID: 35200920 DOI: 10.1364/ao.438928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 11/03/2021] [Indexed: 06/14/2023]
Abstract
We report a scheme for generating ultrabroadband two-photon states by spontaneous parametric downconversion (SPDC) using randomly aperiodically poled crystals designed with an optimization algorithm based on the Monte Carlo-Metropolis method with simulated annealing. A particular SPDC source is discussed, showing results of the spectral and temporal properties of the emitted two-photon states, obtaining almost transform-limited SPDC biphoton wave packets. We also analyze the effect of fabrication errors on the SPDC.
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Jones AE, Menssen AJ, Chrzanowski HM, Wolterink TAW, Shchesnovich VS, Walmsley IA. Multiparticle Interference of Pairwise Distinguishable Photons. PHYSICAL REVIEW LETTERS 2020; 125:123603. [PMID: 33016763 DOI: 10.1103/physrevlett.125.123603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 08/21/2020] [Indexed: 06/11/2023]
Abstract
One of the central principles of quantum mechanics is that if there are multiple paths that lead to the same event and there is no way to distinguish between them, interference occurs. It is often assumed that distinguishing information in the preparation, evolution, or measurement of a system is sufficient to destroy interference. However, it is still possible for photons in distinguishable, separable states to interfere due to the indistinguishability of paths corresponding to possible exchange processes. Here we experimentally measure an interference signal that depends only on the multiparticle interference of four photons in a four-port interferometer despite pairs of them occupying distinguishable states.
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Affiliation(s)
- Alex E Jones
- Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
- Blackett Laboratory, Imperial College London, London SW7 2BW, United Kingdom
| | - Adrian J Menssen
- Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - Helen M Chrzanowski
- Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - Tom A W Wolterink
- Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - Valery S Shchesnovich
- Center for Natural and Human Sciences, Federal University of ABC, Santo André, São Paulo 09210-170, Brazil
| | - Ian A Walmsley
- Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
- Blackett Laboratory, Imperial College London, London SW7 2BW, United Kingdom
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Abstract
Using two crystals for spontaneous parametric down-conversion in a parallel setup, we observe two-photon interference with high visibility. The high visibility is consistent with complementarity and the absence of which-path information. The observations are explained as the effects of entanglement or equivalently in terms of interfering probability amplitudes and also by the calculation of a second-order field correlation function in the Heisenberg picture. The latter approach brings out explicitly the role of the vacuum fields in the down-conversion at the crystals and in the photon coincidence counting. For comparison, we show that the Hong–Ou–Mandel dip can be explained by the same approach in which the role of the vacuum signal and idler fields, as opposed to entanglement involving vacuum states, is emphasized. We discuss the fundamental limitations of a theory in which these vacuum fields are treated as classical, stochastic fields.
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Aashna P, Thyagarajan K. Simultaneous sum-frequency and second-harmonic generation in a planar waveguide. APPLIED OPTICS 2018; 57:4402-4408. [PMID: 29877385 DOI: 10.1364/ao.57.004402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 04/25/2018] [Indexed: 06/08/2023]
Abstract
In this paper, we analyze second-harmonic (SH) generation and sum-frequency (SF) generation in a planar waveguide configuration using 2D quasi-phase-matching (QPM) gratings and show possibility of simultaneous generation of sum frequency and second harmonic. It is shown that it is possible for the two generated frequencies to be noncollinear with respect to the incident pump waves with the SF and SH frequencies exiting at different angles along the planar waveguide, leading to ease of collection. Numerical simulations are performed in a potassium titanyl phosphate planar waveguide, and it is shown that the proposed planar waveguide configuration provides wavelength tunability and has greater conversion efficiencies than bulk configuration and larger bandwidth than channel waveguide configuration.
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Feng S, Kumar P. Spatial symmetry and conservation of orbital angular momentum in spontaneous parametric down-conversion. PHYSICAL REVIEW LETTERS 2008; 101:163602. [PMID: 18999668 DOI: 10.1103/physrevlett.101.163602] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2008] [Indexed: 05/27/2023]
Abstract
Directly contradictory arguments coexist regarding the conservation rule of orbital angular momentum in spontaneous parametric down-conversion. We analytically show how this rule is decided by spatial symmetry. We discover that the down-converted photon pairs can carry non-negligible extrinsic orbital angular momentum in the degrees of relative-movement freedom due to spatial symmetry breaking, leading to nonconservation of total orbital angular momentum in type-II down-conversion. Also, we demonstrate that the traditional technique does not measure the extrinsic orbital angular momentum.
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Affiliation(s)
- Sheng Feng
- Center for Photonic Communication and Computing, EECS Department, Northwestern University, Evanston, IL 60208-3118, USA.
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O'Donnell KA, U'Ren AB. Observation of ultrabroadband, beamlike parametric downconversion. OPTICS LETTERS 2007; 32:817-9. [PMID: 17339947 DOI: 10.1364/ol.32.000817] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
We report spontaneous parametric downconversion having an unusually wide spectral bandwidth. A collinear type 1 phase-matching configuration is employed with degeneracy near the zero group-velocity dispersion frequency. With a spectral width of 1080 nm and degenerate wavelength of 1885 nm, the source also emits a high flux of 3.4 x 10(11) s(-1)W(-1) photon pairs constrained to a cone of only approximately 2 degrees half-angle. A rigorous theoretical approach is developed that confirms the experimental observations. The source properties are consistent with an ultrashort photon-pair correlation time and, for a narrowband pump, extremely high-dimensional spectral entanglement.
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Affiliation(s)
- Kevin A O'Donnell
- División de Física Aplicada, Centro de Investigación Científica yde Educación Superior de Ensenada, Ensenada, Baja California, 22800 Mexico.
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Resch KJ, Lundeen JS, Steinberg AM. Quantum state preparation and conditional coherence. PHYSICAL REVIEW LETTERS 2002; 88:113601. [PMID: 11909400 DOI: 10.1103/physrevlett.88.113601] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2001] [Indexed: 05/23/2023]
Abstract
It is well known that spontaneous parametric down-conversion can be used to probabilistically prepare single-photon states. We have performed an experiment in which arbitrary superpositions of zero- and one-photon states can be prepared by appropriate postselection. The optical phase, which is meaningful only for superpositions of photon number, is related to the relative phase between the zero- and one-photon states. Whereas the light from spontaneous parametric down-conversion has an undefined phase, we show that this technique collapses one beam to a state of well-defined optical phase when a measurement succeeds on the other beam.
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Affiliation(s)
- K J Resch
- Department of Physics, University of Toronto, 60 St. George Street, Toronto ON M5S 1A7, Canada
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Arnaut HH, Barbosa GA. Orbital and intrinsic angular momentum of single photons and entangled pairs of photons generated by parametric down-conversion. PHYSICAL REVIEW LETTERS 2000; 85:286-289. [PMID: 10991264 DOI: 10.1103/physrevlett.85.286] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/1999] [Indexed: 05/23/2023]
Abstract
States of light that are simultaneously eigenstates of orbital, intrinsic, and total angular momentum are found and eigenstates describing pairs of photons from spontaneous parametric down-conversion reveal classes of photon conversion with angular momentum conservation and cases where the initial angular momentum from the pump laser beam is shared between the converted photons and the generating medium. These angular momentum conservation laws open up a wide range of applications to be explored.
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Affiliation(s)
- HH Arnaut
- Departamento de Fisica, Universidade Federal de Minas Gerais, Belo Horizonte MG, Brazil
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Barbosa GA. Quantum images in double-slit experiments with spontaneous down-conversion light. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 54:4473-4478. [PMID: 9913999 DOI: 10.1103/physreva.54.4473] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Joobeur A, Saleh BE, Larchuk TS, Teich MC. Coherence properties of entangled light beams generated by parametric down-conversion: Theory and experiment. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 53:4360-4371. [PMID: 9913410 DOI: 10.1103/physreva.53.4360] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Monken CH, Garuccio A, Branning D, Torgerson JR, Narducci F, Mandel L. Generating mutual coherence from incoherence with the help of a phase-conjugate mirror. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 53:1782-1785. [PMID: 9913072 DOI: 10.1103/physreva.53.1782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Hasegawa Y, Yoda Y, Izumi K, Ishikawa T, Kikuta S, Zhang XW, Ando M. Phase transfer in time-delayed interferometry with nuclear resonant scattering. PHYSICAL REVIEW LETTERS 1995; 75:2216-2219. [PMID: 10059243 DOI: 10.1103/physrevlett.75.2216] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Ingraham RL. Quantum nonlocality in a delayed-choice experiment with partial, controllable memory erasing. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1994; 50:4502-4505. [PMID: 9911448 DOI: 10.1103/physreva.50.4502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Koashi M, Kono K, Matsuoka M, Hirano T. Probing the two-photon phase coherence of parametrically down-converted photons by a local oscillator. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1994; 50:R3605-R3608. [PMID: 9911444 DOI: 10.1103/physreva.50.r3605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Joobeur A, Saleh BE, Teich MC. Spatiotemporal coherence properties of entangled light beams generated by parametric down-conversion. PHYSICAL REVIEW A 1994; 50:3349-3361. [PMID: 9911284 DOI: 10.1103/physreva.50.3349] [Citation(s) in RCA: 108] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Paschotta R, Mertz J. Squeezed-light generation by twin-beam control with an optical cavity. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1994; 49:2820-2826. [PMID: 9910565 DOI: 10.1103/physreva.49.2820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Grayson TP, Barbosa GA. Spatial properties of spontaneous parametric down-conversion and their effect on induced coherence without induced emission. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1994; 49:2948-2961. [PMID: 9910579 DOI: 10.1103/physreva.49.2948] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Ou ZY, Pereira SF, Kimble HJ. Realization of the Einstein-Podolsky-Rosen paradox for continuous variables in nondegenerate parametric amplification. ACTA ACUST UNITED AC 1992. [DOI: 10.1007/bf00325015] [Citation(s) in RCA: 145] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wang LJ, Zou XY, Mandel L. Induced coherence without induced emission. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1991; 44:4614-4622. [PMID: 9906504 DOI: 10.1103/physreva.44.4614] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
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Mertz J, Debuisschert T, Heidmann A, Fabre C, Giacobino E. Improvements in the observed intensity correlation of optical parametric oscillator twin beams. OPTICS LETTERS 1991; 16:1234-1236. [PMID: 19776929 DOI: 10.1364/ol.16.001234] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report an observed quantum noise reduction of 86% (8.5 dB) near 3 MHz in the intensity difference between the twin beams generated by a nondegenerate type II optical parametric oscillator operating above threshold.
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Joshi A, Lawande SV. Violation of Bell's inequality in the resonance fluorescence of two strongly driven two-level atoms. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1991; 44:716-720. [PMID: 9905721 DOI: 10.1103/physreva.44.716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Ou ZY, Zou XY, Wang LJ, Mandel L. Experiment on nonclassical fourth-order interference. PHYSICAL REVIEW A 1990; 42:2957-2965. [PMID: 9904366 DOI: 10.1103/physreva.42.2957] [Citation(s) in RCA: 93] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ou ZY, Zou XY, Wang LJ, Mandel L. Observation of nonlocal interference in separated photon channels. PHYSICAL REVIEW LETTERS 1990; 65:321-324. [PMID: 10042889 DOI: 10.1103/physrevlett.65.321] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Ou ZY, Wang LJ, Zou XY, Mandel L. Coherence in two-photon down-conversion induced by a laser. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1990; 41:1597-1601. [PMID: 9903257 DOI: 10.1103/physreva.41.1597] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Ou ZY, Wang LJ, Zou XY, Mandel L. Evidence for phase memory in two-photon down conversion through entanglement with the vacuum. PHYSICAL REVIEW A 1990; 41:566-568. [PMID: 9902912 DOI: 10.1103/physreva.41.566] [Citation(s) in RCA: 92] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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