Incident Direction Independent Wave Propagation and Unidirectional Lasing

Physical Review Letters
L Jin, Z Song

Abstract

We propose an incident direction independent wave propagation generated by properly assembling different unidirectional destructive interferences (UDIs), which is a consequence of the appropriate match between synthetic magnetic fluxes and the incident wave vector. Single-direction lasing at spectral singularity is feasible without introducing nonlinearity. UDI allows unidirectional lasing and unidirectional perfect absorption; when they are combined in a parity-time-symmetric manner, the spectral singularities vanish with bounded reflections and transmissions. Furthermore, the simultaneous unidirectional lasing and perfect absorption for incidences from opposite directions is created. Our findings provide insights into light control and may shed light on the explorations of desirable functionality in fundamental research and practical applications.

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Citations

Jun 6, 2019·Optics Express·Lin LiuLan Zhou
Sep 7, 2019·Physical Review Letters·Kazuki Yokomizo, Shuichi Murakami
Apr 3, 2021·Physical Review Letters·K L Zhang, Z Song
Mar 13, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Xi-Xi BaoLei Tan

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