Wu Jin-Hui, Gao Jin-Yue, Xu Ji-Hua, Silvestri L, Artoni M, La Rocca G C, Bassani F
College of Physics, Jilin University, Changchun 130023, People's Republic of China.
Phys Rev Lett. 2005 Jul 29;95(5):057401. doi: 10.1103/PhysRevLett.95.057401. Epub 2005 Jul 25.
Tunneling induced quantum interference experienced by an incident probe in asymmetric double quantum wells can easily be modulated by means of an external control light beam. This phenomenon, which is here examined within the dressed-state picture, can be exploited to devise a novel all-optical ultrafast switch. For a suitably designed semiconductor heterostructure, the switch is found to exhibit frequency bandwidths of the order of 0.1 THz and response and recovery times of about 1 ps.
非对称双量子阱中入射探测粒子所经历的隧穿诱导量子干涉可通过外部控制光束轻松调制。本文在缀饰态图景下研究了这一现象，利用该现象可设计出一种新型全光超快开关。对于适当设计的半导体异质结构，发现该开关的频率带宽约为0.1太赫兹，响应和恢复时间约为1皮秒。
