Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Rangelov, Andon"'
We theoretically propose a type of tunable polarization retarder, which is composed of sequences of half-wave and quarter-wave polarization retarders, allowing operation at broad spectral bandwidth. The constituent retarders are composed of stacked s
Externí odkaz:
http://arxiv.org/abs/2404.17853
We show how to create coherent superpositions between two ground states of Lamda quantum system of three states, among which the middle one decays. The idea is to deplete the population of the bright state formed by the two ground states via the popu
Externí odkaz:
http://arxiv.org/abs/2401.02535
We provide a technique for a broadband nonreciprocal wave retarder whose quarter-wave plate phase retardation is the same in forward and backward directions. The system is built using a number of sequential nonreciprocal wave plates. The proposed dev
Externí odkaz:
http://arxiv.org/abs/2305.06431
Autor:
Al-Mahmoud, Mouhamad, Dimova, Emiliya, Hristova, Hristina, Coda, Virginie, Rangelov, Andon, Montemezzani, Germano
We propose a polarization-independent optical isolator that does not use walk-off between the two orthogonal polarizations. The design is based on two Faraday rotators in combination with two half-wave plates in a closed, Sagnac-interferometer-like,
Externí odkaz:
http://arxiv.org/abs/2104.06530
Publikováno v:
Phys. Rev. A 103, 023527 (2021)
We show that a system of three parallel waveguides, among which the central one is dissipative, leads to an ultrabroadband power splitting associated with an overall 50% power loss. The present approach is reminiscent of non-Hermitian systems in quan
Externí odkaz:
http://arxiv.org/abs/2012.02485
Publikováno v:
Applied Optics Vol. 59, Issue 33, pp. 10224-10227 (2020)
We propose a universal scheme for the construction of a device for arbitrary to arbitrary polarization transformation, which consists of two quarter-wave plates and two Faraday rotators. Using this device, one can continuously change the retardance a
Externí odkaz:
http://arxiv.org/abs/2011.07834
We propose a novel optical parametric amplification scheme which combines quasi-phase-matching with a composite pulse approach that involves crystal segments of specific lengths. The presented scheme highly increases the robustness of the frequency c
Externí odkaz:
http://arxiv.org/abs/2001.01784
Publikováno v:
Phys. Rev. Applied 13, 014048 (2020)
A simple scheme for a broadband polarization rotator with tunable rotation angle is proposed and verified experimentally. The rotator consists of only three wave-plates, one of which is a full-wave plate. The robust approach inspired by the composite
Externí odkaz:
http://arxiv.org/abs/1912.01480
Autor:
Stoyanova, Elena, Al-Mahmoud, Mouhamad, Hristova, Hristina, Rangelov, Andon, Dimova, Emiliya, Vitanov, Nikolay V.
Publikováno v:
J. Opt. 21 (2019) 105403 (5pp)
We theoretically suggest and experimentally demonstrate a broadband composite optical rotator that is capable of rotating the polarization plane of a linearly-polarized light at any chosen angle. The device is composed of an even number of half-wave
Externí odkaz:
http://arxiv.org/abs/1910.01352
Autor:
Rangelov, Andon, Longhi, Stefano
We theoretically propose a method for optical isolation based on adiabatic nonlinear sum frequency generation in a chirped quasi-phase-matching crystal with strong absorption at the generated sum frequency wave. The method does not suffer from limita
Externí odkaz:
http://arxiv.org/abs/1612.05607