On-chip reconfigurable transmission in spatially chirped Floquet parity-time symmetric photonics.

ABSTRACT: Phase transition in parity-time (PT) symmetry is one of the most intriguing discoveries in non-Hermitian physics, giving rise to plenty of physical phenomena and strategies to develop advanced devices and systems, such as unconventional lasers, nonreciprocal transmission, and enhanced sensitivity. Floquet PT-symmetric systems are characterized by time-periodic Hamiltonians, in which the gain or loss is modulated to steer the PT phase, providing an additional dimension for realizing phase transitions. In this study, we introduce frequency-varying modulation, specifically spatially chirped modulation, into on-chip Floquet PT-symmetric photonic waveguides to explore their unique properties. The waveguides exhibit distinct forward and backward transmissions when the system dynamically evolves

SUBMITTER: Mao W 

PROVIDER: S-EPMC11887794 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature