A parity-time symmetric coherent plasmonic absorber-amplifier

Baum, B.; Alaeian, Hadiseh; Dionne, Jennifer A.

doi:10.1063/1.4907871

Cited by 64 publications

(36 citation statements)

References 46 publications

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“…The asymmetric forces can be understood from the fact that the system is not invariant under space inversion [38,39]. We use the wellknown PT phase-transition parameters, i.e., n 0 d=λ and n 00 =n 0 [35,[40][41][42], to conduct a detailed study concerning their influence on the optical forces, transmission, and eigenvalues of the scattering matrix:…”

Section: Theorymentioning

confidence: 99%

Optical Pulling and Pushing Forces in Bilayer PT -Symmetric Structures

2018

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We investigate the optical force exerted on a parity-time-symmetric bilayer made of balanced gain and loss. We show that an asymmetric optical pulling or pushing force can be exerted on this system depending on the direction of impinging light. The optical pulling or pushing force has a direct physical link to the optical characteristics embedded in the non-Hermitian bilayer. Furthermore, we suggest taking advantage of the optically generated asymmetric force to launch vibrations of an arbitrary shape, which is useful for the contactless probing of mechanical deformations.

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Section: Theorymentioning

confidence: 99%

Optical Pulling and Pushing Forces in Bilayer PT -Symmetric Structures

2018

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“…Recently it has been shown that the light fields coupled to an optical cavity with an intra-cavity absorber can be completely absorbed and no light can escape through the cavity [3][4][5][6][7][8]. Such a cavity-absorber system acts as a coherent perfect absorber and may be useful for a variety of fundamental studies and practical applications [9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Interference control of perfect photon absorption in cavity quantum electrodynamics

Wang

Zhu

et al. 2017

Phys. Rev. A

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We propose and analyze a scheme for controlling coherent photon transmission and reflection in a cavity-quantum-electrodynamics (CQED) system consisting of an optical resonator coupled with three-level atoms coherently prepared by a control laser from free space. When the control laser is off and the cavity is excited by two identical light fields from two ends of the cavity, the two input light fields can be completely absorbed by the CQED system and the light energy is converted into the excitation of the polariton states, but no light can escape from the cavity. Two distinct cases of controlling the perfect photon absorption are analyzed: (a) when the control laser is tuned to the atomic resonance and creates electromagnetically induced transparency, the prefect photon absorption is suppressed and the input light fields are nearly completely transmitted through the cavity; (b) when the control laser is tuned to the polariton state resonance and inhibits the polariton state excitation, the perfect photon absorption is again suppressed and the input light fields are nearly completely reflected from the cavity. Thus, the CQED system can act as a perfect absorber or near perfect transmitter/reflector by simply turning off or on of the control laser. Such interference control of the coherent photon-atom interaction in the CQED system should be useful for a variety of applications in optical logical devices.

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“…[42] where the author explore prospects of an experimental realization of CPA-laser action in a similar non-PT -symmetric system. …”

Section: Bilayermentioning

confidence: 99%

“…Figure 15 provides a graphical demonstration of this behavior. It shows the plots of u for the TE and TM modes of a PT -symmetric Nd:YAG two-slab system with the following Figure 11: (Color online) Graphs of u in units of u I (dashed navy curves) and | S | in units of | S I | (solid red curves) for the singular TE and TM modes of the constructive configuration of a PT -symmetric Nd:YAG two-slab system given by (42) and (43). Figure 12: (Color online) Graphs of the angle Θ between the Poynting vector S and positive z-axis for the TE and TM modes considered in Fig.…”

Section: Inclusion Of the Effects Of Dispersionmentioning

confidence: 99%

Spectral singularities in the TE and TM modes of a PT-symmetric slab system: Optimal conditions for realizing a CPA–laser

Mostafazadeh

Sarisaman

2016

Annals of Physics

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Among the interesting outcomes of the study of the physical applications of spectral singularities in PT -symmetric optical systems is the discovery of CPA-lasers. These are devices that act both as a threshold laser and a coherent perfect absorber (CPA) for the same values of their physical parameters. Unlike a homogeneous slab that is made to act as a CPA, a slab CPA-laser would absorb the incident waves coming from the left and right of the device provided that they have appropriate intensity and phase contrasts. We provide a comprehensive study of one of the simplest experimentally accessible examples of a CPA-laser, namely a PT -symmetric optical slab system consisting of a balanced pair of adjacent or separated gain and loss components. In particular, we give a closed form expression describing the spectral singularities of the system which correspond to its CPA-laser configurations. We determine the intensity and phase contrasts for the TE and TM waves that are emitted (absorbed) whenever the slab acts as a laser (CPA). We also investigate the behavior of the time-averaged energy density u and Poynting vector S for these waves. This is necessary for determining the optimal values of the physical parameters of the system that make it act as a CPA-laser. These turn out to correspond to situations where the separation distance s between the gain and loss layers is an odd multiple of a characteristic length scale s 0 . A curious by-product of our study is that, except for the cases where s is an even integer multiple of s 0 , there is a critical angle of polarization beyond which the energy of the waves emitted from the lossy layer can be larger than the energy of those emitted from the gain layer.

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A parity-time symmetric coherent plasmonic absorber-amplifier

Cited by 64 publications

References 46 publications

Optical Pulling and Pushing Forces in Bilayer PT -Symmetric Structures

Optical Pulling and Pushing Forces in Bilayer PT -Symmetric Structures

Interference control of perfect photon absorption in cavity quantum electrodynamics

Spectral singularities in the TE and TM modes of a PT-symmetric slab system: Optimal conditions for realizing a CPA–laser

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