Phase-controlled Optical PT symmetry and asymmetric light diffraction in one- and two-dimensional optical lattices

We propose a novel scheme for asymmetric light diffraction of a weak probe field in a one-dimensional (1D) and two-dimensional (2D) lattice occupied with cold atoms. The atoms are driven into the double-lambda-type configuration by a standing wave, two coupling laser fields and a probe. Our study su...

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Bibliographic Details
Published in:European physical journal plus 2020-10, Vol.135 (10), p.791, Article 791
Main Authors: Naeimi, Ali Akbar, Darabi, Elham, Mortezapour, Ali, Naeimi, Ghasem
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Approximation
Asymmetry
Atomic
Cold atoms
Complex Systems
Condensed Matter Physics
Coupling
Diffraction patterns
Light diffraction
Mathematical and Computational Physics
Molecular
Normal distribution
Optical and Plasma Physics
Optical lattices
Physics
Physics and Astronomy
Regular Article
Standing waves
Symmetry
Theoretical
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Summary:We propose a novel scheme for asymmetric light diffraction of a weak probe field in a one-dimensional (1D) and two-dimensional (2D) lattice occupied with cold atoms. The atoms are driven into the double-lambda-type configuration by a standing wave, two coupling laser fields and a probe. Our study suggests the proposed scheme is capable of forming an asymmetric diffraction as a result of inducing optical parity-time symmetry in both 1D and 2D lattices. Moreover, it is demonstrated that the asymmetric pattern of diffraction can be dynamically manipulated by means of adjusting the relative phase. Furthermore, it is revealed that in the case of 1D lattice (grating), intensity variation of the coupling fields has a significant impact on the intensity of diffraction orders.
ISSN:2190-5444
2190-5444
DOI:10.1140/epjp/s13360-020-00817-7