Discrete dynamics of light in an anti-parity-time symmetric photonic lattice in atomic vapors.
Opt Lett
; 48(21): 5735-5738, 2023 Nov 01.
Article
em En
| MEDLINE
| ID: mdl-37910746
ABSTRACT
We demonstrate the realization of an anti-parity-time (PT)-symmetric photonic lattice in a coherent three-level Λ-type 85Rb atomic system both experimentally and theoretically. Such an instantaneously reconfigurable anti-PT-symmetric photonic lattice is "written" by two one-dimensional coupling fields, which are arranged alternately along the x direction and can modulate the refractive index of the atomic vapor in a spatially periodical manner via controllable atomic coherence. By properly adjusting the relevant atomic parameters, the phase shift between two adjacent lattice channels occurs in the constructed non-Hermitian photonic system. Such a readily reconfigurable anti-PT-symmetric photonic lattice may open the door for demonstrating the discrete characteristics of the optical waves in periodic anti-PT-symmetric photonic systems.
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MEDLINE
Idioma:
En
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Opt Lett
Ano de publicação:
2023
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Article