Recently, Associate Professor Jin Liang of the School of Physics and Science of Nankai University cooperated with Professor Song Zhi to design a wave propagation independent of the incident direction and unidirectional laser emission using the unique asymmetry exhibited by one-way destructive interference. Time-reversed symmetric protection of optical reciprocity, in order to achieve arbitrary light manipulation, it is essential to destroy optical non-reciprocity, usually need to introduce optical nonlinear or magneto-optical medium, but the complexity of nonlinear systems and magneto-optical materials Limitations limit the development of this area. How to destroy optical reciprocity without relying on optical nonlinearity and magneto-optical media is a big problem. The PT (Proton-Time) Symmetrical Optical Open System provides a good platform for energy exchange between system and environment. Easy reflection, it is not possible to achieve non-reciprocal transmission. Jin Liang and Song Zhi's research work designed an Akhanov-Bohm interferometer based on a single-cavity coupled cavity array. The synthetic magnetic field of the interferometer originates from asymmetric side coupling. The unidirectional destructive interference can be achieved by the matching of the synthetic magnetic flux and the incident wave vector, which will cause the symmetry of the phase of the outgoing wave to be broken when the wave is incident from the opposite direction; the dissipation or gain is introduced into the side coupling cavity, and the damage can be broken. The symmetry of the exit wave probability and the optical reciprocity are completely destroyed. The one-way destructive interference has the characteristics of two-way non-reflection, so it can greatly facilitate the design of light modulation and manipulation; it can easily predict the function of the optical device composed of unidirectional destructive interference as a basic unit. This work designed the light propagation without depending on the incident direction, showing the singular functions such as optical isolation, rectification, unidirectional absorption, and unidirectional laser emission. The research can be applied to optical integrated devices, providing a new way of thinking for the design of new light absorbers such as absorbers, rectifiers, isolators, and amplitude modulators. 10 Subwoofer,8 Ohm Woofer,Best Subwoofer,Subwoofer Bass Ningbo Sonice Electroacoustic Science and Technology Co., Ltd. , https://www.secspk.com
February 07, 2020