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of 244
pro vyhledávání: '"Gupta, S. Dutta"'
We study the transverse spin and the Belinfante spin momentum in a gain-loss balanced waveguide, known to be one of the first and most studied examples of $\mathcal{PT}$-symmetric systems. Such a guide supports the spectral singularities leading to i
Externí odkaz:
http://arxiv.org/abs/1905.11284
Autor:
Gouda, Mostafa, Nassarawa, Sanusi Shamsudeen, Gupta, S. Dutta, Sanusi, Nassarawa Isma'il, Nasiru, Mustapha Muhammad
Publikováno v:
In Plant Physiology and Biochemistry July 2023 200
Publikováno v:
BioNanoScience; Sep2024, Vol. 14 Issue 3, p3555-3571, 17p
We study phase conjugation in a nonlinear composite slab when the counter propagating pump waves are completely absorbed by means of coherent perfect absorption. Under the undepleted pump approximation the coupling constant and the phase conjugated r
Externí odkaz:
http://arxiv.org/abs/1611.06841
We study theoretically the transverse spin associated with the eigenmodes of a thin metal film embedded in a dielectric. We show that the transverse spin has a direct dependence on the nature and strength of the coupling leading to two distinct branc
Externí odkaz:
http://arxiv.org/abs/1610.00612
Autor:
Mukherjee, Samyobrata, Gupta, S. Dutta
Publikováno v:
Eur. Phys. J. Appl. Phys. (2016) 76: 30001
We consider a symmetric gap plasmon guide (a folded Kretschmann configuration) supporting both symmeric and antisymmetric coupled surface plasmons. We calculate the transverse spin under illumination from both the sides like in coherent perfect absor
Externí odkaz:
http://arxiv.org/abs/1605.04401
Publikováno v:
In Optics Communications 15 April 2021 485
Publikováno v:
In Optics Communications 1 January 2020 454
Autor:
Reddy, K. Nireekshan, Gupta, S. Dutta
We review some of the recent concepts and their realization exploiting the perfect destructive interference of light in micro and nano structures. One refers to optical structures where the effective absorption can be controlled and maximized to perf
Externí odkaz:
http://arxiv.org/abs/1407.4276
Autor:
Reddy, K. Nireekshan, Gupta, S. Dutta
We study theoretically a PT-symmetric saturable balanced gain-loss system in a ring cavity configuration. The saturable gain and loss are modeled by two-level medium with or without population inversion. We show that the specifics of the spectral sin
Externí odkaz:
http://arxiv.org/abs/1405.6812