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Vol. 6, Issue 8, 2018
Editor(s): Greg Gbur and Konstantinos Makris
Year: 2018
Status: Published
Editor(s): Greg Gbur and Konstantinos Makris
Year: 2018
Status: Published
The idea of parity-time (PT) symmetry, first introduced in quantum mechanics, was recently realized in the context of photonics in the form of balanced gain-loss structures with special symmetries. In recent years, these systems have been shown to have many exotic features and behaviors with various potential applications, including unidirectional invisibility, coherent perfect absorption, negative refraction, novel laser designs, optical isolation, and unusual wave diffraction dynamics. One of the main characteristics of such non-Hermitian configurations is the existence of abrupt effective phase transitions that occur when the gain-loss amplitude exceeds a certain threshold value, providing even greater control over device design and functionality. More general gain-loss structures can exhibit an even richer variety of non-Hermitian optical properties, and the breadth of these properties has yet to be fully explored. This special issue is on a wide range of recent developments in the new area of parity-time (PT) symmetric and Non-Hermitian Optics, considering theoretical, experimental, and practical aspects of synthetic structures that contain gain and loss.
Contents
10 article(s)
Introduction to non-Hermitian photonics in complex media: PT-symmetry and beyond
Greg Gbur, and Konstantinos Makris
This special issue is dedicated to the emerging field of non-Hermitian photonics of complex media, with emphasis on PT-symmetric optical structures. In particular, the papers highlight the variety of applications being considered
Photonics Research
May. 01, 2018, Vol. 6 Issue 5 0500PTS1 (2018)
Dispersive non-Hermitian optical heterostructures
O. V. Shramkova... and G. P. Tsironis|Show fewer author(s)
The effect of material dispersion on the optical properties of one-dimensional non-Hermitian scattering systems is investigated in detail. In particular, multilayer heterostructures with gain and loss (parity-time symmetric or not
Photonics Research
Jan. 30, 2018, Vol. 6 Issue 4 040000A1 (2018)
Photon-pair generation in a quadratically nonlinear parity-time symmetric coupler
Diana A. Antonosyan... and Andrey A. Sukhorukov|Show fewer author(s)
Integrated nonlinear waveguide structures enable generation of quantum entangled photons. We describe theoretically the effects of spatially inhomogeneous loss on the creation of photon pairs through spontaneous parametric down-co
Photonics Research
Feb. 12, 2018, Vol. 6 Issue 4 040000A6 (2018)
Non-Hermitian lattices with a flat band and polynomial power increase [Invited]丨On the Cover
Li Ge
In this work, we first discuss systematically three general approaches to construct a non-Hermitian flat band, defined by its dispersionless real part. These approaches resort to, respectively, spontaneous restoration of non-Hermi
Photonics Research
Mar. 05, 2018, Vol. 6 Issue 4 04000A10 (2018)
Bistable lasing in parity-time symmetric coupled fiber rings
Sergey V. Smirnov... and Andrey A. Sukhorukov|Show fewer author(s)
We propose a parity-time (PT) symmetric fiber laser composed of two coupled ring cavities with gains and losses, which operates both in PT-symmetric and symmetry-broken regimes depending on the static phase shifts. We perform anal
Photonics Research
Mar. 20, 2018, Vol. 6 Issue 4 04000A18 (2018)
Parity-time-symmetric whispering-gallery mode nanoparticle sensor [Invited]
Weijian Chen... and Lan Yang|Show fewer author(s)
We present a study of single nanoparticle detection using parity-time (PT) symmetric whispering-gallery mode (WGM) resonators. Our theoretical model and numerical simulations show that, with balanced gain and loss, the PT-symmetri
Photonics Research
Apr. 04, 2018, Vol. 6 Issue 5 05000A23 (2018)
Necklaces of PT-symmetric dimers
D. J. Nodal Stevens... and B. M. Rodríguez-Lara|Show fewer author(s)
We study light propagation through cyclic arrays, composed by copies of a given PT-symmetric dimer, using a group theoretical approach and finite element modeling. The theoretical mode-coupling analysis suggests the use of these d
Photonics Research
Apr. 04, 2018, Vol. 6 Issue 5 05000A31 (2018)
Circular Bragg lasers with radial PT symmetry: Design and analysis with a coupled-mode approach
Ziyao Feng... and Xiankai Sun|Show fewer author(s)
Parity–time (PT) symmetry has been demonstrated in the frame of classic optics. Its applications in laser science have resulted in unconventional control and manipulation of resonant modes. PT-symmetric periodic circular Bragg las
Photonics Research
Apr. 11, 2018, Vol. 6 Issue 5 05000A38 (2018)
Engineering the emission of laser arrays to nullify the jamming from passive obstacles
Constantinos Valagiannopoulos, and Vassilios Kovanis
Non-Hermitian characteristics accompany any photonic device incorporating spatial domains of gain and loss. In this work, a one-dimensional beam-forming array playing the role of the active part is disturbed from the scattering lo
Photonics Research
Jul. 10, 2018, Vol. 6 Issue 8 08000A43 (2018)
Passive parity-time-symmetry-breaking transitions without exceptional points in dissipative photonic systems [Invited]
Yogesh N. Joglekar, and Andrew K. Harter
Over the past decade, parity-time (PT)-symmetric Hamiltonians have been experimentally realized in classical, optical settings with balanced gain and loss, or in quantum systems with localized loss. In both realizations, the PT-sy
Photonics Research
Jul. 24, 2018, Vol. 6 Issue 8 08000A51 (2018)
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