[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. However, is difficult to solve analytically. Coherent perfect absorber condition: (a),(b) Modulus of eigenvalues of the scattering matrix S as a function of wavelength and dimension of the gold antennas. 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. 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. [1][2] It is the time reversed counterpart of a laser. 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. WikiMatrix . 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. However, absorption can be made much more efficient by exploiting wave interference. 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. Lett. However, many coherent perfect absorbers work only at narrow absorption bandwidth, which is limited in broadband applications such as solar thermal photovoltaics . Coherent perfect absorbers act as linear, absorptive interferometers, which may be useful as detectors, transducers, and switches. 2. 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. Interferometric control of absorption in thin plasmonic metamaterials: general two port theory and broadband operation. [6] In February 2011 the team at Yale built the first working anti-laser. Example sentences with "coherent perfect absorber", translation memory. In the presence of specific amounts of dissipation, there exist interference patterns that trap the incident radiation for an infinite time. Europe is a more ambiguous term than most geographic expressions. [1] [2] It is the time-reversed counterpart of a laser. Importantly, an absorber of a subwavelength thickness can operate between the regimes of total absorption and total transmission [4]. omegawiki. Longhi, Stefano (2010). [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. It is the time reversed counterpart of a laser. [1][2] При этом энергия излучения преобразуется в тепловую энергию. "Backward lasing yields a perfect 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. (140 km) long; 3 30 mi. Coherent perfect absorption is a general and robust phenomenon related to the analytic properties of the S matrix. "PT-symmetric laser absorber". A coherent perfect absorber (CPA), or antilaser, is a device that absorbs coherent light and converts it into heat or other formsofinternalenergy[1].Itisthetime-reversedcounterpart of a laser [2]. Coherent perfect absorption (CPA) is the complete extinction of incoming … What does coherent perfect absorber actually mean? 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 ]. [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]. This is the condition for acoustic coherent perfect absorbers. A localized non-Hermitian potential can operate as a coherent perfect absorber or as a laser for nonlinear waves. A device which absorbs coherent light particles. [1][2] It is the time reversed counterpart of a laser. Coherent Perfect Absorbers: Time-Reversed Lasers Y. D. Chong, Li Ge, Hui Cao, and A. D. Stone Phys. Coherent Perfect Absorber Based on Antisymmetric Metasurface With Gain Material Impact Statement: We proposed a coherent perfect absorber based on metasurface with gain material. Stefano Longhi (2010). Recently, the first working model capable of absorbing 99.4% of all incident light was reported [4]. Here, we review recent advances in the design and applications of such devices. [7][8] It is a two-channel CPA device which absorbs the output of two lasers, but only when the beams have the correct phases and amplitudes. You are currently offline. The absorption of electromagnetic energy by a material is a phenomenon that underlies many applications, including molecular sensing, photocurrent generation and photodetection. 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. We refer to such an optical system as a coherent perfect absorber (CPA). 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. The effect is illustrated for an array of optical waveguides, with the central waveguide being either active or absorbing. 2D materials in our system play the role to enhance the absorption rate of a … Harrison Ford Nom de naissance Harrison Ford …   Wikipédia en Français, mechanics — /meuh kan iks/, n. 1. coherent perfect absorber Definitions. Such a device is termed a “coherent perfect absorber” (CPA) and a … [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. 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. The absorption efficiency of a coherent perfect absorber usually depends on the phase coherence of the incident waves on the surfaces. 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). Here, we present a scheme to create a multi-channel coherent perfect absorber in which the constraint of phase coherence is loosened. 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. Analytical model for coherent perfect absorption in one-dimensional photonic structures. Some features of the site may not work correctly. The concept was first presented by Chong et al. Coherent perfect absorption (CPA) is a time-reversed process of a lasing where full absorption of classical light is achieved by coherent illumination of an absorber [1-3]. Stefano Longhi (2010). Page. [3] Концепция… …   Википедия, Superlens — A superlens, super lens or perfect lens is a lens which uses metamaterials to go beyond the diffraction limit. Again, the frequency and relative phase of the light is chosen to correspond to a "coherent perfect absorber" mode. [3]. 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