A localized non-Hermitian potential can operate as a coherent perfect absorber or as a laser for nonlinear waves. It is the time reversed counterpart of a laser. Page. (used with a sing. v.) the theoretical and practical application …   Universalium, We are using cookies for the best presentation of our site. In the presence of specific amounts of dissipation, there exist interference patterns that trap the incident radiation for an infinite time. [1] [2] It is the time-reversed counterpart of a laser. In 2011, a team at Yale University built the first working model. Lett. 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). Continuing to use this site, you agree with this. A bifunctional hybrid absorber–emitter (HAE) for efficient STPV by sequentially depositing HfO 2 /Mo/HfO 2 films on a metallic surface is demonstrated here. Coherent Perfect Absorbers: Time-Reversed Lasers Y. D. Chong, Li Ge, Hui Cao, and A. D. Stone Phys. 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 … Coherent perfect absorption (CPA) is the complete extinction of incoming … 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. 2. 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. Here, we review recent advances in the design and applications of such devices. "Time-Reversed Lasing and Interferometric Control of Absorption". Rev. 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. 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. [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. 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. "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. [2][7] In contrast a normal laser uses a gain medium which amplifies light instead of absorbing it. [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. (c) Real and imaginary parts of the eigenvalue of the S-matrix as a function of wavelength for L y D220 nm. [1][2] It is the time reversed counterpart of a laser. Furthermore, many of the remaining light waves are cancelled out by interfering with each other. Interferometric control of absorption in thin plasmonic metamaterials: general two port theory and broadband operation. (2010). Chong, Y.; Ge, Li; Cao, Hui; Stone, A. Such a device is termed a “coherent perfect absorber” (CPA) and a … 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. Semantic Scholar is a free, AI-powered research tool for scientific literature, based at the Allen Institute for AI. Example sentences with "coherent perfect absorber", translation memory. 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. Here, we review recent advances in the design and applications of such devices. coherent perfect absorber in English translation and definition "coherent perfect absorber", Dictionary English-English online. omegawiki. The coherent perfect absorber (CPA)-laser behaviour occurs when a zero and a pole meet on the real axis. Europe is a more ambiguous term than most geographic expressions. (color online) Motion of exact S-matrix zeros (blue crosses… 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. 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. coherent perfect absorber Definitions. A device which absorbs coherent light particles. [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. "Coherent Perfect Absorbers: Time-Reversed Lasers". We present the theoretical principles underlying the phenomenon of coherent perfect absorption and give an overview of the … Coherent Perfect Absorber Based on Antisymmetric Metasurface With Gain Material Impact Statement: We proposed a coherent perfect absorber based on metasurface with gain material. 105, 053901 – Published 26 July 2010 See Viewpoint: Backward lasing yields a perfect absorber (5 48 km) wide. Absorption of electromagnetic energy by a material is a phenomenon that underlies many applied problems, including molecular sensing, photocurrent generation and photodetection. v.) the branch of physics that deals with the action of forces on bodies and with motion, comprised of kinetics, statics, and kinematics. What does coherent perfect absorber actually mean? 2D materials in our system play the role to enhance the absorption rate of 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. [1][2] It is the time reversed counterpart of a laser. 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. This effect arises from the interaction of optical absorption and wave interference, and corresponds to moving a zero of the S … This technology is expected to be used in optical switches. (c) Experimental results showing CPA-laser functionality. INTRODUCTION . Longhi, Stefano (2010). 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 wafer aligns the light waves from the lasers so they become trapped, causing most of the photons to bounce back and forth until they are absorbed and transformed into heat. [3] Концепция… …   Википедия, Superlens — A superlens, super lens or perfect lens is a lens which uses metamaterials to go beyond the diffraction limit. 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. Analytical model for coherent perfect absorption in one-dimensional photonic structures. This design is provide a new idea for all-optical modulator and … Coherent perfect absorption arises from the interplay of interference and absorption. Identical lasers are fired into a cavity containing a silicon wafer, a light-absorbing material that acts as a "loss medium." Stefano Longhi (2010). The effect is illustrated for an array of optical waveguides, with the central waveguide being either active or absorbing. 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 ]. Here, we review recent advances in the design and applications of such devices. 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 concept was first presented by Chong et al. However, many coherent perfect absorbers work only at narrow absorption bandwidth, which is limited in broadband applications such as solar thermal photovoltaics . "PT-symmetric laser absorber". [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. We suggest graphene and a two-dimensional (2D) Weyl semimetal (WSM) as 2D materials for the realization of a broadband coherent perfect absorber (CPA) respecting overall PT-symmetry.We also demonstrate the conditions for mutually equal amplitudes and phases of the left and right incoming waves to realize a CPA. [6] In February 2011 the team at Yale built the first working anti-laser. We refer to such an optical system as a coherent perfect absorber (CPA). [3]. It also opens perspectives for designing atom lasers. Wan, W.; Chong, Y.; Ge, L.; Noh, H.; Stone, A. D.; Cao, H. (2011). 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. [7], Антилазер — Антилазер  популярное название когерентного идеального поглотителя, то есть механизма поглощения когерентного светового излучения с определённой длиной волны. The selective coherent perfect absorbers with … Here, we present a scheme to create a multi-channel coherent perfect absorber in which the constraint of phase coherence is loosened. Importantly, an absorber of a subwavelength thickness can operate between the regimes of total absorption and total transmission [4]. [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 Douglas Stone. 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