文献类型：期刊文献

英文题名：Controllable twin laser pulse propagation and dual-optical switching in a four-level quantum dot nanostructure

作者：Qi, Yihong[1];Zhou, Fengxue[1];Yang, Jie[1];Niu, Yueping[1];Gong, Shangqing[1]

机构：[1]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2013

卷号：30

期号：7

起止页码：1928

外文期刊名：JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS

收录：;EI(收录号：20132916502622);WOS:【SCI-EXPANDED(收录号:WOS:000321337800018)】；

基金：This work was supported by the National Natural Sciences Foundation of China (Grant Nos. 11074263 and 11274112), Shanghai Rising-Star Program (Grant No. 11QA1407400), China Postdoctoral Science Foundation (Grant No. 20110490684), the Fundamental Research Funds for the Central Universities (Grant No. WM1114024), and the National Laboratory for Infrared Physics, CAS (Grant No. 201101).

语种：英文

外文关键词：Optical switches - Laser pulses - Light propagation - Probes - Quantum dot lasers - Switching - Nanocrystals

摘要：We investigate control of the propagation dynamics of weak twin laser pulses and propose a dual-optical switching scheme in four-level semiconductor quantum dots of diamond configuration. It is shown that the propagation dynamics of the two probe pulses depend not only on the intensity of corresponding control field in each cascade transition path but also on the relative intensities of the two control fields. This property provides the probability for realizing all-optical switching in the quantum dots. Possible all-optical switching operations for any one of the probe fields or both probe fields simultaneously with the same or adverse switching status can be realized by modulating the corresponding control fields. In addition, the relative phase of the laser fields also influences the switching operation and can be used to realize optical switching, which is also discussed in the paper. (C) 2013 Optical Society of America