Unidirectional invisibility in a two-layer non-PT-symmetric slab
نویسندگان
چکیده
منابع مشابه
Unidirectional invisibility induced by PT-symmetric periodic structures.
Parity-time (PT) symmetric periodic structures, near the spontaneous PT-symmetry breaking point, can act as unidirectional invisible media. In this regime, the reflection from one end is diminished while it is enhanced from the other. Furthermore, the transmission coefficient and phase are indistinguishable from those expected in the absence of a grating. The phenomenon is robust even in the pr...
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Parity-time (PT) symmetric structures present the unidirectional invisibility at the spontaneous PT-symmetry breaking point. In this paper, we propose a PT-symmetric circuit consisting of a resistor and a microwave tunnel diode (TD) which represent the attenuation and amplification, respectively. Based on the scattering matrix method, the circuit can exhibit an ideal unidirectional performance ...
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We describe a parametrization of the real spectral locus of the twoparametric family of PT-symmetric quartic oscillators. For this family, we find a parameter region where all eigenvalues are real, extending the results of Dorey, Dunning, Tateo and Shin. MSC: 81Q05, 34M60, 34A05
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The mechanism of achieving unidirectional transmission in the gratings, which only contain isotropic dielectric and metallic layers, is suggested and numerically validated. It is shown that significant transmission in one direction and nearly zero transmission in the opposite direction can be obtained in the same intrinsically isotropic gratings as those studied recently in A. E. Serebryannikov...
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We study transport properties of an array created by alternating (a, b) layers with balanced loss/ gain characterized by the key parameter γ. It is shown that for non-equal widths of (a, b) layers, i.e., when the corresponding Hamiltonian is non- -symmetric, the system exhibits the scattering properties similar to those of truly -symmetric models provided that without loss/ gain the struct...
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ژورنال
عنوان ژورنال: Optics Express
سال: 2014
ISSN: 1094-4087
DOI: 10.1364/oe.22.019440