OPTICAL NONLINEARITIES AND CARRIER RELAXATION IN CDTE/CDMNTE MULTIPLE-QUANTUM WELLS

被引:0
|
作者
CAIN, N
ONEILL, M
NICHOLLS, JE
DEVINE, PE
LANGLEY, AJ
TADAY, P
机构
[1] UNIV HULL,DEPT ENGN DESIGN & MANUFACTURE,KINGSTON HULL HU6 7RX,N HUMBERSIDE,ENGLAND
[2] RUTHERFORD APPLETON LAB,CENT LASER FACIL,DIDCOT OX11 0QX,OXON,ENGLAND
关键词
D O I
10.1006/spmi.1993.1126
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Nonlinear changes in transmission at the exciton resonance of CdTe/CdMnTe multiple quantum wells were measured at room temperature with a time resolution of 300 fs. For one sample, the observed nonlinearity saturates when the photogenerated carrier density is between 2.5 and 5.0 x 10(12) cm-2. This result is explained by considering the optical nonlinear effects resulting from band-filling. Time dependent measurements of the nonlinear transmission show that carrier transfer from the barriers to the wells and carrier relaxation in the wells occur in less than 300 fs. The latter value corresponds to an electron relaxation rate of at least 2.6 x 10(11) eV s-1.
引用
收藏
页码:211 / 213
页数:3
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