Key Laboratory of Artificial Structures and Quantum Control (MOE), Department of Physics, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
Nanotechnology. 2011 Feb 4;22(5):055202. doi: 10.1088/0957-4484/22/5/055202. Epub 2010 Dec 22.
Laser and strong coupling can coexist in a single quantum dot (QD) coupled to a photonic crystal nanocavity. This provides an important clue towards the realization of a quantum optical transistor. Using experimentally realistic parameters, in this work, theoretical analysis shows that such a quantum optical transistor can be switched on or off by turning on or off the pump laser, which corresponds to attenuation or amplification of the probe laser, respectively. Furthermore, based on this quantum optical transistor, an all-optical measurement of the vacuum Rabi splitting is also presented. The idea of associating a quantum optical transistor with this coupled QD-nanocavity system may achieve images of light controlling light in all-optical logic circuits and quantum computers.
激光和强耦合可以共存于一个与光子晶体纳米腔耦合的单个量子点中。这为实现量子光晶体管提供了重要线索。在这项工作中，使用实验上可行的参数进行理论分析表明，通过开启或关闭泵浦激光，可以打开或关闭这种量子光晶体管，分别对应于探测激光的衰减或放大。此外，基于这种量子光晶体管，还提出了一种真空拉比分裂的全光测量方法。将量子光晶体管与这个耦合的量子点-纳米腔系统相关联的想法，可能会在全光逻辑电路和量子计算机中实现光控光的图像。
