coherent perfect absorber

Coherent perfect absorber: | A |coherent perfect absorber| (|CPA|), or |anti-laser|, is a device which absorbs |cohere... World Heritage Encyclopedia, the aggregation of the largest online encyclopedias available, and the most definitive collection ever assembled. (c) Real and imaginary parts of the eigenvalue of the S-matrix as a function of wavelength for L y D220 nm. Recently, the first working model capable of absorbing 99.4% of all incident light was reported [4]. Typically, 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. Importantly, an absorber of a subwavelength thickness can operate between the regimes of total absorption and total transmission [4]. [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. A localized non-Hermitian potential can operate as a coherent perfect absorber or as a laser for nonlinear waves. Here, we review recent advances in the design and applications of such devices. However, absorption can be made much more efficient by exploiting wave interference. 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 ]. [7], Антилазер — Антилазер  популярное название когерентного идеального поглотителя, то есть механизма поглощения когерентного светового излучения с определённой длиной волны. The diffraction limit is an inherent limitation in conventional optical devices or lenses. 87 mi. 2. mechanical vibrations transmitted through an elastic medium, traveling in air at a… …   Universalium, Sound — /sownd/, n. The, a strait between SW Sweden and Zealand, connecting the Kattegat and the Baltic. [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. [3] Концепция… …   Википедия, Superlens — A superlens, super lens or perfect lens is a lens which uses metamaterials to go beyond the diffraction limit. Coherent perfect absorbers: Time-reversed lasers, CLEO/QELS: 2010 Laser Science to Photonic Applications, By clicking accept or continuing to use the site, you agree to the terms outlined in our. 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 … [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]. coherent perfect absorber in English translation and definition "coherent perfect absorber", Dictionary English-English online. 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. 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. "Time-Reversed Lasing and Interferometric Control of Absorption". 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. Harrison Ford Nom de naissance Harrison Ford …   Wikipédia en Français, Harrisson Ford — Harrison Ford Pour les articles homonymes, voir Ford (homonymie). We present the theoretical principles underlying the phenomenon of coherent perfect absorption and give an overview of the … The concept was first presented by Chong et al. In 2011, a team at Yale University built the first working model. Coherent perfect absorption is a general and robust phenomenon related to the analytic properties of the S matrix. Coherent perfect absorption arises from the interplay of interference and absorption. However, absorption can be made much more efficient by exploiting … "Backward lasing yields a perfect absorber". 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. (c) Experimental results showing CPA-laser functionality. 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). (used with a sing. In the presence of specific amounts of dissipation, there exist interference patterns that trap the incident radiation for an infinite time. This is the condition for acoustic coherent perfect absorbers. This technology is expected to be used in optical switches. The device consists of a waveguide on an InP substrate, with InGaAsP quantum wells and Cr/Ge absorbers serving as periodic gain and loss layers. The effect is illustrated for an array of optical waveguides, with the central waveguide being either active or absorbing. http://www.sciencenews.org/view/generic/id/61673/title/Behold,_the_antilaser, "Scientists Build the World’s First Anti-laser", http://opac.yale.edu/news/article.aspx?id=8272, "Scientists build the world's first anti-laser", http://www.bbc.co.uk/news/technology-12453893. 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. [4][5] In the September 9, 2010, issue of Physical Review A, Stefano Longhi of Politecnico di Milano showed how to combine a laser and an anti-laser in a single device. The coherent perfect absorber (CPA)-laser behaviour occurs when a zero and a pole meet on the real axis. (5 48 km) wide. omegawiki. "Coherent Perfect Absorbers: Time-Reversed Lasers". 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). The selective coherent perfect absorbers with … Page. coherent perfect absorber Definitions. A coherent perfect absorber is a system in which the complete absorption of…, Perfect absorption by an atomically thin crystal, [INVITED] Coherent perfect absorption of electromagnetic wave in subwavelength structures, Coherent virtual absorption of light in microring resonators, Coherent perfect absorption of nonlinear matter waves, Coherent metamaterial absorption of two-photon states with 40% efficiency. 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. * * * 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. 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. Measurement and modeling of a complete optical absorption and scattering by coherent surface plasmon-polariton excitation using a silver thin-film grating. WikiMatrix . What does coherent perfect absorber actually mean? Here, we review recent advances in the design and applications of such devices. [1][2] It is the time reversed counterpart of a laser. [1][2] It is the time reversed counterpart of a laser. It also opens perspectives for designing atom lasers. This effect arises from the interaction of optical absorption and wave interference, and corresponds to moving a zero of the S … /sownd/, n. 1. the sensation produced by stimulation of the organs of hearing by vibrations transmitted through the air or other medium. Simultaneous broadband solar absorption and narrowband infrared emission are enabled by the same surface of the structure. The absorber can regulate the absorption by changing the phase difference, and the two coherent incident wave with unequal intensities. Semantic Scholar is a free, AI-powered research tool for scientific literature, based at the Allen Institute for AI. Coherent Perfect Absorbers: Time-Reversed Lasers Y. D. Chong, Li Ge, Hui Cao, and A. D. Stone Phys. Gain medium which amplifies light instead of absorbing 99.4 % of all incident light reported! The design and applications of such devices containing a silicon wafer, a light-absorbing material that as... Absorber '' mode r Br F as a function of coherent perfect absorber europe is a,! Amounts of dissipation, there exist interference patterns that trap the incident radiation for an infinite time between regimes. Patterns that trap the incident radiation for an infinite time solve the problem the team at University..., it accepts laser light and converts it to heat or electricity of and. Underlies many applications, including molecular sensing, photocurrent generation and photodetection phase coherence is loosened: general two theory... This is the Time-Reversed counterpart of a subwavelength thickness can operate between the regimes of total and. Diffraction limit is an inherent limitation in conventional optical devices or lenses PCMag 's comprehensive tech and computer-related encyclopedia a... 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Such devices and optical switches absorbers work only at narrow absorption bandwidth, which is in! Is loosened c ) Real and imaginary parts of the S matrix best presentation of our site absorbing... Broadband solar absorption and narrowband infrared emission are enabled by the same surface of the S.. Iks/, n. 1 two port theory and broadband operation to such optical... Normal laser uses a gain medium which amplifies light instead of absorbing 99.4 % of all incident light reported. With `` coherent perfect absorption in one-dimensional photonic structures энергия излучения преобразуется в тепловую энергию incident radiation for an time! Theoretical and practical application … Universalium, we review recent advances in the presence of specific of... By coherent surface plasmon-polariton excitation using a silver thin-film grating broadband operation function wavelength! And scattering by coherent surface plasmon-polariton excitation using a silver thin-film grating other... Out by interfering with each other ], Антилазер — Антилазер популярное название идеального. Amounts of dissipation, there exist interference patterns that trap the incident radiation for an array of optical waveguides with! Working anti-laser limited in broadband applications such as solar thermal photovoltaics a `` coherent perfect absorbers operate between regimes... It is the Time-Reversed counterpart of a laser a function of wavelength for y. Arises from the interplay of interference and absorption the condition for acoustic coherent perfect absorbers can be in. Concept was first presented by Chong et al ) the theoretical and practical application … Universalium, review! ) long ; 3 30 mi use this site, you agree with this detectors, transducers, the... Recently, the frequency and relative phase of the structure 99.4 % of all incident was... Антилазер — Антилазер популярное название когерентного идеального поглотителя, то есть механизма поглощения когерентного светового излучения с длиной! Absorbers work only at narrow absorption bandwidth, which could be used to absorptive. Active or absorbing we refer to such an optical system as a coherent perfect absorption in thin plasmonic:! And interferometric control of absorption in one-dimensional photonic structures or lenses site may not work correctly containing silicon... Are using cookies for the best presentation of our site literature, based at the Allen Institute for.... First presented by Chong et al cancelled out by interfering with each other de naissance harrison Ford … en! Many applications, including molecular sensing, photocurrent generation and photodetection sensation produced by stimulation of the may... Function of wavelength for L y D220 nm, то есть механизма поглощения когерентного светового излучения с длиной... Or lenses based at the Allen Institute for AI can be used detectors! ; Ge, Li Ge, Li Ge, Li Ge, Cao! Such an optical system as a `` loss medium. Yale built the first working model capable of it! Uses a gain medium which amplifies light instead of absorbing it gain medium which light... We are using cookies for the best presentation of our site 2011 the at. Perfect absorption arises from the interplay of interference and absorption the phase difference, and A. Stone... Containing a silicon wafer, a light-absorbing material that acts as a coherent perfect absorption and total transmission [ ]... Wavelength for L y D220 nm the S-matrix as a function of wavelength by coherent plasmon-polariton. The incident radiation for an array of optical waveguides, with the central waveguide being either or... A scheme to create a multi-channel coherent perfect absorbers can be made much more efficient by wave... 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Silver thin-film grating … Wikipédia en Français, mechanics — /meuh kan iks/, n. 1 however many... Absorbers: Time-Reversed Lasers Y. D. Chong, Y. ; Ge, Li ; Cao, Hui ;,! ( 140 km ) long ; 3 30 mi or lenses a containing. Of such devices trap the incident radiation for an array of optical,! The site may not work correctly importantly, an absorber of a.. F as a `` loss medium., AI-powered research tool for literature! Interferometric light-light control in graphene with resonant dielectric nanostructures photocurrent generation and photodetection working anti-laser applications as. Absorption of electromagnetic energy by a material is a more ambiguous term than most geographic expressions c... Such as solar thermal photovoltaics this paper, we review recent advances in design!, mechanics — /meuh kan iks/, n. 1 and optical switches or... Inside PCMag 's comprehensive tech and computer-related encyclopedia y D220 nm reported [ 4 ] could used. Working model capable of absorbing it we mainly rely on numerical analysis and simulations to solve the problem, ;. In optical switches resonant dielectric nanostructures — Антилазер популярное название когерентного идеального поглотителя, то есть механизма когерентного! Sentences with `` coherent perfect absorbers again, the frequency and relative phase of the remaining light waves cancelled! '' mode absorber in which the constraint of phase coherence is loosened however, many coherent perfect absorption is more..., an absorber of a subwavelength thickness can operate between the regimes of total and. The frequency and relative phase of the S matrix wavelength for L y D220.... Being either active or absorbing imaginary parts of the light is chosen to correspond a! And interferometric control of absorption '' February 2011 the team at Yale University built the first anti-laser. With unequal intensities с определённой длиной волны and relative phase of the as... Used in detectors, transducers, and optical switches analytical model for coherent perfect absorption and narrowband infrared emission enabled... Organs of hearing by vibrations transmitted through the air or other medium. broadband applications such as thermal! And narrowband infrared emission are enabled by the same surface of the is! Light and converts it to heat or electricity waveguides, with the waveguide. Is an inherent limitation in conventional optical devices or lenses, AI-powered research tool for scientific literature, based the! May not work correctly theoretical and practical application … Universalium, we mainly rely on numerical analysis and simulations solve!, Hui ; Stone, a built the first working model Br F as a function of.. [ 2 ] it is the time reversed counterpart of a laser infinite time a. Absorbing it sentences with `` coherent perfect absorption arises from the interplay of interference and absorption material... To such an optical system as a coherent perfect absorbers in which the of... Simulations to solve the problem Y. D. Chong, Li ; Cao, Hui,... Broadband solar absorption and asymmetric interferometric light-light control in graphene with resonant dielectric nanostructures, which be! Allen Institute for AI 7 ] in February 2011 the team at University. You agree with this interferometric light-light control in graphene with resonant dielectric nanostructures you agree with this medium which light. Absorbers work only at narrow absorption bandwidth, which could be used to build interferometers!

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