Importantly, an absorber of a subwavelength thickness can operate between the regimes of total absorption and total transmission [4]. Absorption of electromagnetic energy by a material is a phenomenon that underlies many applied problems, including molecular sensing, photocurrent generation and photodetection. 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. OK. Gmachl, Claire F. (2010). v.) the theoretical and practical application …   Universalium, We are using cookies for the best presentation of our site. "Coherent Perfect Absorbers: Time-Reversed Lasers". (used with a sing. Recently, the first working model capable of absorbing 99.4% of all incident light was reported [4]. The concept was first presented by Chong et al. We present the theoretical principles underlying the phenomenon of coherent perfect absorption and give an overview of the … coherent perfect absorber Definitions. Combined with existing graphene metasurface absorbers and the characteristics of interfering beams, monolayer graphene/dielectric and multilayer graphene/dielectric coherent perfect absorber (CPA) in the … v.) the branch of physics that deals with the action of forces on bodies and with motion, comprised of kinetics, statics, and kinematics. Coherent perfect absorption and asymmetric interferometric light-light control in graphene with resonant dielectric nanostructures. Here, we present a scheme to create a multi-channel coherent perfect absorber in which the constraint of phase coherence is loosened. The coherent perfect absorber (CPA)-laser behaviour occurs when a zero and a pole meet on the real axis. Its etymology is doubtful, as is the physical extent of the area it designates.… …   Universalium, Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …   Wikipedia, sound — sound1 soundable, adj. [1][2] It is the time reversed counterpart of a laser. Harrison Ford Nom de naissance Harrison Ford …   Wikipédia en Français, Harrisson Ford — Harrison Ford Pour les articles homonymes, voir Ford (homonymie). A localized non-Hermitian potential can operate as a coherent perfect absorber or as a laser for nonlinear waves. [1] In 2000, a type of lens was proposed,… …   Wikipedia, Europe, history of — Introduction       history of European peoples and cultures from prehistoric times to the present. Here, we review recent advances in the design and applications of such devices. [7], Антилазер — Антилазер  популярное название когерентного идеального поглотителя, то есть механизма поглощения когерентного светового излучения с определённой длиной волны. Coherent perfect absorption arises from the interplay of interference and absorption. A device which absorbs coherent light particles. INTRODUCTION . Coherent perfect absorbers act as linear, absorptive interferometers, which may be useful as detectors, transducers, and switches. Coherent Perfect Absorbers: Time-Reversed Lasers Y. D. Chong, Li Ge, Hui Cao, and A. D. Stone Phys. Semantic Scholar is a free, AI-powered research tool for scientific literature, based at the Allen Institute for AI. Swedish and Danish, Oresund. It also opens perspectives for designing atom lasers. "Backward lasing yields a perfect absorber". 105, 053901 – Published 26 July 2010 See Viewpoint: Backward lasing yields a perfect absorber A coherent perfect absorber is a system in which the complete absorption of electromagnetic radiation is achieved by controlling the interference of multiple incident waves. We refer to such an optical system as a coherent perfect absorber (CPA). Coherent Perfect Absorption in a Weakly Absorbing Fiber, Dynamical Control of Broadband Coherent Absorption in ENZ Films, Coherent perfect absorption of single photons in a fiber network, Coherent perfect absorption in deeply subwavelength films in the single-photon regime. [3] The concept was first published in the July 26, 2010, issue of Physical Review Letters, by a team at Yale University led by theorist W. J. Find out inside PCMag's comprehensive tech and computer-related encyclopedia. A coherent perfect absorber is a system in which the complete absorption of electromagnetic radiation is achieved by controlling the interference of multiple incident waves. (2010). You are currently offline. 2. Coherent perfect absorbers: Time-reversed lasers Abstract: An arbitrary body or aggregate can be made perfectly absorbing at discrete frequencies, if a precise amount of dissipation is added under specific conditions of coherent monochromatic illumination. Such a device is termed a “coherent perfect absorber” (CPA) and a … Coherent Control of Photocurrent in a Strongly Scattering Photoelectrochemical System, Coherent Perfect Absorption in Metamaterials with Entangled Photons, Time-Reversed Lasing and Interferometric Control of Absorption, Progress toward high-Q perfect absorption: A Fano antilaser, Coherent control of optical polarization effects in metamaterials. (used with a sing. A coherent perfect absorber is a system in which the complete absorption of electromagnetic radiation is achieved by controlling the interference of multiple incident waves. Coherent Perfect Absorber Based on Antisymmetric Metasurface With Gain Material Impact Statement: We proposed a coherent perfect absorber based on metasurface with gain material. Coherent perfect absorption is a general and robust phenomenon related to the analytic properties of the S matrix. (d) t2 r Br F as a function of wavelength. "Laser science: Suckers for light". Wan, W.; Chong, Y.; Ge, L.; Noh, H.; Stone, A. D.; Cao, H. (2011). What does coherent perfect absorber actually mean? "PT-symmetric laser absorber". Again, the frequency and relative phase of the light is chosen to correspond to a "coherent perfect absorber" mode. [4] Another potential application is in radiology, where the principle of the CPA might be used to precisely target electromagnetic radiation inside human tissues for therapeutic or imaging purposes. The selective coherent perfect absorbers with … A Coherent perfect absorber (CPA), or anti-laser, is a device which absorbs coherent light and converts it to some form of internal energy such as heat or electrical energy. Negative index metamaterials or negative index materials (NIM) are artificial structures where the refractive… …   Wikipedia, Harisson Ford — Harrison Ford Pour les articles homonymes, voir Ford (homonymie). omegawiki. Coherent perfect absorber based on metamaterials Nie, Guangyu; Shi, Quanchao; Zhu, Zheng; Shi, Jinhui 2014-11-13 00:00:00 We demonstrate selective coherent perfect absorption based on interaction between bilayered asymmetrically split rings (ASRs) metamaterials and a standing wave formed by two coherent counter propagating beams. Lett. "Backward lasing yields a perfect absorber". Analytical model for coherent perfect absorption in one-dimensional photonic structures. "Time-Reversed Lasing and Interferometric Control of Absorption". Longhi, Stefano (2010). Some features of the site may not work correctly. Coherent perfect absorption (CPA) is the complete extinction of incoming … Furthermore, many of the remaining light waves are cancelled out by interfering with each other. (color online) Motion of exact S-matrix zeros (blue crosses… This technology is expected to be used in optical switches. Recently, coherent perfect absorption of light is proposed and demonstrated in a planar intrinsic silicon slab when illuminated on both sides by two beams with equal intensities and correct relative phase [ 1, 2 ]. Page. Also called a "coherent perfect absorber" (CPA), it accepts laser light and converts it to heat or electricity. In 2011, a team at Yale University built the first working model. (c) Real and imaginary parts of the eigenvalue of the S-matrix as a function of wavelength for L y D220 nm. It is the time reversed counterpart of a laser. However, absorption can be made much more efficient by exploiting wave interference. We propose a scheme for a coherent perfect absorber (CPA) and a laser in an atomic medium with gain and loss, obeying simultaneously a spectral singularity and a time-reversed spectral singularity, both occurring at different wavevectors (or frequencies). Commonly, the incident energy is delivered to the system through a single channel, for example by a plane wave incident on one side of an absorber. [9] The initial device was able to absorb 99.4 percent of all incoming light, but the team behind the invention believe it will be possible to increase this number to 99.999 percent.[7]. [2][7] In contrast a normal laser uses a gain medium which amplifies light instead of absorbing it. Identical lasers are fired into a cavity containing a silicon wafer, a light-absorbing material that acts as a "loss medium." Europe is a more ambiguous term than most geographic expressions. * * * I Mechanical disturbance that propagates as a longitudinal wave… …   Universalium, Negative index metamaterials — A negative index metamaterial causes light to refract, or bend, differently than in more common positive refractive index materials. ; Cao, coherent perfect absorber A. D. Stone Phys hearing by vibrations transmitted through the air other... 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