2016/02/15 by L. Jin, X. Z. Zhang, G. Zhang +1
Physics and Astronomy · #Asymmetry #Nonlinear Waves and Solitons #Parity (physics) #Quantum Mechanics and Non-Hermitian Physics #Reciprocal #Reciprocal lattice #Reflection (computer programming) #Reflection symmetry #Rotational symmetry #Scattering #Symmetry (geometry) #Topological Materials and Phenomena #quant-ph
paper · pdf · doi:10.1038/srep20976
published as Sci. Rep. 6, 20976 (2016) · 19 Pages, 5 figures + SI of 4 Pages, 2 figures
openalex publication_date 2016/02/15 · arxiv created 2016/02/28 · arxiv updated 2016/03/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
Parity-time (PT) symmetry is of great interest. The reciprocal and unidirectional features are intriguing besides the (PT) symmetry phase transition. Recently, the reciprocal transmission, unidirectional reflectionless and invisibility are intensively studied. Here, we show the reciprocal reflection/transmission in (PT)-symmetric system is closely related to the type of (PT) symmetry, that is, the axial (reflection) (PT) symmetry leads to reciprocal reflection (transmission). The results are further elucidated by studying the scattering of rhombic ring form coupled resonators with enclosed synthetic magnetic flux. The nonreciprocal phase shift induced by the magnetic flux and gain/loss break the parity (P) and time-reversal (T) symmetry but keep the parity-time (PT) symmetry. The reciprocal reflection (transmission) and unidirectional transmission (reflection) are found in the axial (reflection) (PT)-symmetric ring centre. The explorations of symmetry and asymmetry from (PT) symmetry may shed light on novel one-way optical devices and application of (PT)-symmetric metamaterials.