Coherent laser-induced optical behaviors in three-coupled-quantum wells and their application to terahertz signal detection |
| |
Authors: | Jiahua Li Rong Yu Anshou Zheng |
| |
Institution: | a Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China b School of Science, Wuhan Institute of Technology, Wuhan 430073, People’s Republic of China c College of Mathematics and Physics, China University of Geosciences, Wuhan 430074, People’s Republic of China |
| |
Abstract: | We investigate quantum optical behaviors of a weak-probe laser field in an asymmetric semiconductor three-coupled-quantum wells (TCQW) structure based on intersubband transitions (ISBTs) via switch-on/off of terahertz (TH) signal radiation under the application of a control laser field. A scheme for TH signal detection and its strength measurement based on this probe absorption characteristic also are put forward, where TH signal field does not interact directly with electron, but significantly affects the coherent optical absorption properties of such a weak-probe laser field. Consequently, the proposed TCQW nanostructure may be used for reducing and cancelling out the important thermionic dark current component in the process of TH signal detection, measurement and photodetector design. |
| |
Keywords: | 42 50 Gy 78 67 De 42 50 Hz |
本文献已被 ScienceDirect 等数据库收录! |
|