标题： 量子光学二极管与半导体微腔 显示英文标题

标题： Quantum optical diode with semiconductor microcavities

摘要： 半导体二极管作为电气整流器，允许单向电子传输，是集成电路中信息处理的关键。 类似地，可在特定目标波长下工作的光学整流器（或二极管）最近成为光通信和信号处理中的梦想器件。 在本文中，我们提出了一种方案，在单光子水平上实现光子传输的光学二极管。 该系统由两个通过${\chi ^{(2)}}$非线性耦合的空间重叠的单模半导体微腔组成。 预测该系统中会发生光子阻塞。 这些光子阻塞效应可以通过调节输入激光场（驱动场）的频率来实现。 基于这些阻塞效应，我们通过零时间和有限时间延迟的二阶关联函数，解析地推导了单光子和双光子电流。 结果表明，该系统可以作为单光子和双光子量子光学二极管，其在某一方向上传输光子的效率远高于另一方向。 显示英文摘要

摘要： The semiconductor diode, which acts as an electrical rectifier and allows unidirectional electronic transports, is the key to information processing in integrated circuits. Analogously, an optical rectifier (or diode) working at specific target wavelengths has recently becomes a dreaming device in optical communication and signal processing. In this paper, we propose a scheme to realize an optical diode for photonic transport at the level of few photons. The system consists of two spatially overlapping single-mode semiconductor microcavities coupled via ${\chi ^{(2)}}$ nonlinearities. The photon blockade is predicted to take place in this system. These photon blockade effects can be achieved by tuning the frequency of the input laser field (driving field). Based on those blockades, we derive analytically the single- and two-photon current in terms of zero and finite-time delayed two-order correlation function. The results suggest that the system can serve as an single- and two-photon quantum optical diodes which allow transmission of photons in one direction much more efficiently than in the other.