Chinese Optics Letters, 2024, 22 (3): 031901, Published Online: Mar. 22, 2024
Talbot effect in anti-PT symmetric synthetic photonic lattices
Abstract
We investigated the Talbot effect in an anti-parity-time (PT) symmetric synthetic photonic lattice composed of two coupled fiber loops. We calculated the band structures and found that with an increase in the gain-loss parameter, the band transitions from a real spectrum to a complex spectrum. We study the influence of phase in the Hermitian operator on the Talbot effect, and the Talbot effect disappears when the period of the input field is N > 8. Further study shows that the variation of Talbot distance can also be modulated by non-Hermitian coefficients of gain and loss. This work may find significant applications in pulse repetition-rate multiplication, temporal invisibility, and tunable intensity amplifiers.
Zhaofeng Liu, Siwei Tang, Zengrun Wen, Yuanmei Gao, Yangjian Cai, Liren Zheng. Talbot effect in anti-PT symmetric synthetic photonic lattices[J]. Chinese Optics Letters, 2024, 22(3): 031901.