1
|
Oña D, Ortega-Gomez A, Hernández O, Liberal I. Orthogonal Thermal Noise and Transmission Signals: A New Coherent Perfect Absorption's Feature. PHYSICAL REVIEW LETTERS 2024; 133:103801. [PMID: 39303245 DOI: 10.1103/physrevlett.133.103801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 08/05/2024] [Indexed: 09/22/2024]
Abstract
Coherent perfect absorption (CPA) is an interference process associated with the zeros of the scattering matrix of interest for optical computing, data processing, and sensing. However, the noise properties of CPA remain relatively unexplored. Here, we demonstrate that CPA thermal noise signals exhibit a unique property: they are orthogonal to the signals transmitted through the network. In turn, such property enables a variety of thermal noise management effects, such as the physical separability of thermal noise and transmitted signals, and "externally lossless" networks that internally host radiative heat transfer processes. We believe that our results provide a new perspective on the many CPA technologies currently under development.
Collapse
|
2
|
Chen L, Kottos T, Anlage SM. Perfect absorption in complex scattering systems with or without hidden symmetries. Nat Commun 2020; 11:5826. [PMID: 33203847 PMCID: PMC7673030 DOI: 10.1038/s41467-020-19645-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 10/19/2020] [Indexed: 11/09/2022] Open
Abstract
Wavefront shaping (WFS) schemes for efficient energy deposition in weakly lossy targets is an ongoing challenge for many classical wave technologies relevant to next-generation telecommunications, long-range wireless power transfer, and electromagnetic warfare. In many circumstances these targets are embedded inside complicated enclosures which lack any type of (geometric or hidden) symmetry, such as complex networks, buildings, or vessels, where the hypersensitive nature of multiple interference paths challenges the viability of WFS protocols. We demonstrate the success of a general WFS scheme, based on coherent perfect absorption (CPA) electromagnetic protocols, by utilizing a network of coupled transmission lines with complex connectivity that enforces the absence of geometric symmetries. Our platform allows for control of the local losses inside the network and of the violation of time-reversal symmetry via a magnetic field; thus establishing CPA beyond its initial concept as the time-reversal of a laser cavity, while offering an opportunity for better insight into CPA formation via the implementation of semiclassical tools.
Collapse
Affiliation(s)
- Lei Chen
- Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, 20742, USA.
- Department of Electrical and Computer Engineering, University of Maryland, College Park, MD, 20742, USA.
| | - Tsampikos Kottos
- Wave Transport in Complex Systems Lab, Department of Physics, Wesleyan University, Middletown, CT, 06459, USA
| | - Steven M Anlage
- Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, 20742, USA.
- Department of Electrical and Computer Engineering, University of Maryland, College Park, MD, 20742, USA.
| |
Collapse
|
3
|
Yang F, Fan Y, Yang R, Xu J, Fu Q, Zhang F, Wei Z, Li H. Controllable coherent perfect absorber made of liquid metal-based metasurface. OPTICS EXPRESS 2019; 27:25974-25982. [PMID: 31510459 DOI: 10.1364/oe.27.025974] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 08/15/2019] [Indexed: 06/10/2023]
Abstract
Coherent perfect absorber (CPA) is a novel strategy proposed and demonstrated for solving the challenge to attain efficient control of absorption by exploiting the inverse process of lasing. The operation condition of CPA results in narrow-band, which is the main limitation obstruct it from practical applications. Here, we demonstrate a CPA with tunable operation frequency employing the liquid metal made reconfigurable metasurface. The flow of liquid metal is restricted with a plastic pipe for realizing a controllable liquid metal cut-wire. The adjustable electric dipolar mode of the reconfigurable cur-wire metasurface ensures that the quasi-CPA point can be dynamically controlled; the measured CPA under proper phase modulation is in good agreement with the simulation results. The proposed CPA system involving liquid metal for dynamic control of operation frequency will have potential applications and may stimulate the exploitation of liquid based smart absorption control of optical waves.
Collapse
|
4
|
Trainiti G, Ra'di Y, Ruzzene M, Alù A. Coherent virtual absorption of elastodynamic waves. SCIENCE ADVANCES 2019; 5:eaaw3255. [PMID: 31497641 PMCID: PMC6716958 DOI: 10.1126/sciadv.aaw3255] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 07/19/2019] [Indexed: 05/31/2023]
Abstract
Absorbers suppress reflection and scattering of an incident wave by dissipating its energy into heat. As material absorption goes to zero, the energy impinging on an object is necessarily transmitted or scattered away. Specific forms of temporal modulation of the impinging signal can suppress wave scattering and transmission in the transient regime, mimicking the response of a perfect absorber without relying on material loss. This virtual absorption can store energy with large efficiency in a lossless material and then release it on demand. Here, we extend this concept to elastodynamics and experimentally show that longitudinal motion can be perfectly absorbed using a lossless elastic cavity. This energy is then released symmetrically or asymmetrically by controlling the relative phase of the impinging signals. Our work opens previously unexplored pathways for elastodynamic wave control and energy storage, which may be translated to other phononic and photonic systems of technological relevance.
Collapse
Affiliation(s)
- G. Trainiti
- Daniel Guggenheim School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Y. Ra'di
- Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX 78712, USA
- Photonics Initiative, Advanced Science Research Center, City University of New York, New York, NY 10031, USA
| | - M. Ruzzene
- Daniel Guggenheim School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - A. Alù
- Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX 78712, USA
- Photonics Initiative, Advanced Science Research Center, City University of New York, New York, NY 10031, USA
- Physics Program, Graduate Center, City University of New York, New York, NY 10016, USA
- Department of Electrical Engineering, City College of The City University of New York, New York, NY 10031, USA
| |
Collapse
|
5
|
Pichler K, Kühmayer M, Böhm J, Brandstötter A, Ambichl P, Kuhl U, Rotter S. Random anti-lasing through coherent perfect absorption in a disordered medium. Nature 2019; 567:351-355. [DOI: 10.1038/s41586-019-0971-3] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 01/04/2019] [Indexed: 11/09/2022]
|
6
|
Choi J, Noh H. Enhanced absorption by coherent control in a photonic crystal resonator coupled with a microfiber. OPTICS LETTERS 2018; 43:5532-5534. [PMID: 30439888 DOI: 10.1364/ol.43.005532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 10/13/2018] [Indexed: 06/09/2023]
Abstract
We demonstrate enhanced absorption in a photonic crystal resonator (PCR) coupled with an optical microfiber. Enhanced absorption is based on coherent perfect absorption (CPA) that is time-reversed lasing. The PCR is fabricated on a silicon membrane with optimized parameters obtained from a numerical simulation. In an experiment, we observed 72% of absorption for the PCR with the optimized parameters. We also verified numerically that the absorption required for CPA can be tuned by changing the distance between the PCR and the optical microfiber.
Collapse
|
7
|
Long H, Cheng Y, Liu X. Reconfigurable sound anomalous absorptions in transparent waveguide with modularized multi-order Helmholtz resonator. Sci Rep 2018; 8:15678. [PMID: 30356082 PMCID: PMC6200729 DOI: 10.1038/s41598-018-34117-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 10/11/2018] [Indexed: 11/18/2022] Open
Abstract
Helmholtz resonators offer an ideal platform for advanced sound absorbers, but their utility has been impeded by inherent frequency range limitations and the lack of function reconfiguration. Here, we introduce a multi-order Helmholtz resonator (MHR) that allows multiple monopolar resonant modes theoretically and experimentally. The combination of these modularized MHRs further creates reconfigurable multi-band anomalous absorbers in a two-port transparent waveguide while maintaining undisturbed air ventilation. In asymmetric absorption state through coupling of artificial sound soft boundary with preposed MHR, sound energy is almost totally absorbed in multiple frequency ranges when sound waves are incident from one side while it is largely reflected back from the opposite side. Interestingly, the original asymmetric absorber would turn into symmetric bidirectional absorber if one post MHR concatenates after the soft boundary. Using combination of identical MHRs, we demonstrate function selective asymmetric/symmetric absorber in multi-bands, highlighting the potential to use MHRs in the design of diverse devices for more versatile applications.
Collapse
Affiliation(s)
- Houyou Long
- Key Laboratory of Modern Acoustics, Department of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Ying Cheng
- Key Laboratory of Modern Acoustics, Department of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China. .,State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing, 100190, China.
| | - Xiaojun Liu
- Key Laboratory of Modern Acoustics, Department of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China. .,State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing, 100190, China.
| |
Collapse
|
8
|
Subwavelength Interferometric Control of Absorption in Three-port Acoustic Network. Sci Rep 2018; 8:12328. [PMID: 30120275 PMCID: PMC6098002 DOI: 10.1038/s41598-018-30287-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 07/23/2018] [Indexed: 11/12/2022] Open
Abstract
Utilizing the effect of losses, we show that symmetric 3-port devices exhibit coherent perfect absorption of waves and we provide the corresponding conditions on the reflection and transmission coefficients. Infinite combinations of asymmetric inputs with different amplitudes and phase at each port as well as a completely symmetric input, are found to be perfectly absorbed. To illustrate the above we study an acoustic 3-port network operating in a subwavelength frequency both theoretically and experimentally. In addition we show how the output from a 3-port network is altered, when conditions of perfect absorption are met but the input waves phase and amplitude vary. In that regard, we propose optimized structures which feature both perfect absorption and perfect transmission at the same frequency by tuning the amplitudes and phases of the input waves.
Collapse
|
9
|
Müllers A, Santra B, Baals C, Jiang J, Benary J, Labouvie R, Zezyulin DA, Konotop VV, Ott H. Coherent perfect absorption of nonlinear matter waves. SCIENCE ADVANCES 2018; 4:eaat6539. [PMID: 30105306 PMCID: PMC6086614 DOI: 10.1126/sciadv.aat6539] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 06/29/2018] [Indexed: 05/06/2023]
Abstract
Coherent perfect absorption is the complete extinction of incoming radiation by a complex potential in a physical system supporting wave propagation. The concept was proven for linear waves in a variety of systems including light interacting with absorbing scatterers, plasmonic metasurfaces, and graphene films, as well as sound waves. We extend the paradigm to coherent perfect absorption of nonlinear waves and experimentally demonstrate it for matter waves in an atomic Bose-Einstein condensate. Coherent absorption of nonlinear matter waves is achieved easier than its linear analogs because the strength of two-body interactions offers additional freedom for control. Implementation of the coherent perfect absorber of Bose-Einstein condensates paves the way toward broad exploitation of the phenomenon in nonlinear optics, exciton-polariton condensates, acoustics, and other areas of nonlinear physics. It also opens perspectives for designing atom lasers.
Collapse
Affiliation(s)
- Andreas Müllers
- Department of Physics and OPTIMAS Research Center, Technische Universität Kaiserslautern, Erwin Schrödinger Straße, 67663 Kaiserslautern, Germany
| | - Bodhaditya Santra
- Department of Physics and OPTIMAS Research Center, Technische Universität Kaiserslautern, Erwin Schrödinger Straße, 67663 Kaiserslautern, Germany
| | - Christian Baals
- Department of Physics and OPTIMAS Research Center, Technische Universität Kaiserslautern, Erwin Schrödinger Straße, 67663 Kaiserslautern, Germany
- Graduate School Materials Science in Mainz, Staudinger Weg 9, 55128 Mainz, Germany
| | - Jian Jiang
- Department of Physics and OPTIMAS Research Center, Technische Universität Kaiserslautern, Erwin Schrödinger Straße, 67663 Kaiserslautern, Germany
| | - Jens Benary
- Department of Physics and OPTIMAS Research Center, Technische Universität Kaiserslautern, Erwin Schrödinger Straße, 67663 Kaiserslautern, Germany
| | - Ralf Labouvie
- Department of Physics and OPTIMAS Research Center, Technische Universität Kaiserslautern, Erwin Schrödinger Straße, 67663 Kaiserslautern, Germany
- Graduate School Materials Science in Mainz, Staudinger Weg 9, 55128 Mainz, Germany
| | | | - Vladimir V. Konotop
- Deparatmento de Física and Centro de Física Teórica e Computacional, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Ed. C8, Lisboa 1749-016, Portugal
- Corresponding author. (V.V.K.); (H.O.)
| | - Herwig Ott
- Department of Physics and OPTIMAS Research Center, Technische Universität Kaiserslautern, Erwin Schrödinger Straße, 67663 Kaiserslautern, Germany
- Corresponding author. (V.V.K.); (H.O.)
| |
Collapse
|
10
|
Ge H, Yang M, Ma C, Lu MH, Chen YF, Fang N, Sheng P. Breaking the barriers: advances in acoustic functional materials. Natl Sci Rev 2017. [DOI: 10.1093/nsr/nwx154] [Citation(s) in RCA: 116] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Acoustics is a classical field of study that has witnessed tremendous developments over the past 25 years. Driven by the novel acoustic effects underpinned by phononic crystals with periodic modulation of elastic building blocks in wavelength scale and acoustic metamaterials with localized resonant units in subwavelength scale, researchers in diverse disciplines of physics, mathematics, and engineering have pushed the boundary of possibilities beyond those long held as unbreakable limits. More recently, structure designs guided by the physics of graphene and topological electronic states of matter have further broadened the whole field of acoustic metamaterials by phenomena that reproduce the quantum effects classically. Use of active energy-gain components, directed by the parity–time reversal symmetry principle, has led to some previously unexpected wave characteristics. It is the intention of this review to trace historically these exciting developments, substantiated by brief accounts of the salient milestones. The latter can include, but are not limited to, zero/negative refraction, subwavelength imaging, sound cloaking, total sound absorption, metasurface and phase engineering, Dirac physics and topology-inspired acoustic engineering, non-Hermitian parity–time synthetic active metamaterials, and one-way propagation of sound waves. These developments may underpin the next generation of acoustic materials and devices, and offer new methods for sound manipulation, leading to exciting applications in noise reduction, imaging, sensing and navigation, as well as communications.
Collapse
Affiliation(s)
- Hao Ge
- National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
| | - Min Yang
- Department of Physics, Hong Kong University of Science and Technology, Hong Kong, China
| | - Chu Ma
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Ming-Hui Lu
- National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Yan-Feng Chen
- National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Nicholas Fang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Ping Sheng
- Department of Physics, Hong Kong University of Science and Technology, Hong Kong, China
| |
Collapse
|
11
|
Abstract
We show that through the wave energy conserved and reversible process of coherent interactions of scalar waves in a multi-channel system joint by a common junction, it is possible to generate outgoing waves only in certain channels by controlling the incoming waves. We refer to such processes as coherent perfect channeling (CPC). As two particular examples, we report experimental and theoretical investigations of CPC with two incoming coherent waves in three and four-channel waveguides that are completely channeled into one or two other waveguides mediated by a deep subwavelength dimension scatterer at the common junction. Two such scatterers are discovered, one confirmed by experiments and the other predicted by theory, and their scattering matrices are constructed. Scatterers with other CPC scattering matrices are explored, and preliminary investigations of their properties are conducted. The scattering matrix formulism makes it possible to extend the domain of CPC to other scalar waves, such as electromagnetic waves and quantum wavefunctions.
Collapse
|