GENERATION OF TERAHERTZ ELECTROMAGNETIC PULSES FROM QUANTUM-WELL STRUCTURES

被引:47
作者
LUO, MSC
CHUANG, SL
PLANKEN, PCM
BRENER, I
ROSKOS, HG
NUSS, MC
机构
[1] UNIV ILLINOIS,DEPT ELECT & COMP ENGN,URBANA,IL 61801
[2] AT&T BELL LABS,HOLMDEL,NJ 07733
关键词
D O I
10.1109/3.299473
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Terahertz generation from semiconductor quantum-well structures pumped by a femtosecond optical pulse is studied. We propose a three-level model for the electrons and holes in the quantum wells. We then solve the coupled optical Bloch equations directly using a Runge-Kutta method and calculate the terahertz radiation field. We study optical rectification and quantum beats caused by charge oscillations in 1) a coupled quantum well in which quantum beats occur between two electron states of the coupled system and 2) a single-quantum-well structure in which quantum beats occur between light-hole and heavy-hole excitons Our theoretical results agree very well with the experimentally measured terahertz data.
引用
收藏
页码:1478 / 1488
页数:11
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