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High contrast all-optical diode based on direction-dependent optical bistability within asymmetric ring cavity
Institution:1.School of Mathematics and Physics, Jinggangshan University, Ji'an 343009, China;2.MOE Key laboratory of Advanced Micro-structure Materials, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
Abstract:We propose a simple all-optical diode which is comprised of an asymmetric ring cavity containing a two-level atomic ensemble. Attributed to spatial symmetry breaking of the ring cavity, direction-dependent optical bistability is obtained in a classical bistable system. Therefore, a giant optical non-reciprocity is generated, which guarantees an all-optical diode with a high contrast up to 22 d B. Furthermore, its application as an all-optical logic AND gate is also discussed.
Keywords:optical diode  optical bistability  optical logic gate  
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