Quantum optical diode with semiconductor microcavities
Quantum optical diode with semiconductor microcavities
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DOI：
10.1103/physreva.90.023849
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发表时间：
2014-03
影响因子：
2.9
通讯作者：
H. Shen;Y. H. Zhou;X. Yi
中科院分区：
文献类型：
--
作者：
H. Shen;Y. H. Zhou;X. Yi
半导体二极管是集成电路中信息处理的关键，它起到了电子整流的作用，并允许单向电子传输。类似地，工作在特定目标波长的光整流器(或二极管)最近已成为光通信和信号处理中的梦幻设备。本文提出了一种在少光子水平上实现光子传输的光学二极管的方案。该系统由两个空间重叠的单模半导体微腔通过非线性耦合而成。据预测，光子封锁将发生在这个系统中。这些光子阻挡效应可以通过调谐输入激光场(驱动场)的频率来实现。在这些阻塞的基础上，我们解析地导出了单光子和双光子电流的零时延二阶关联函数和有限时间延迟二阶关联函数。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，允许光子在一个方向上的传输比在另一个方向上更有效。
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.