Nonlinearity and recovery time of 1.55 mu m intersubband absorption in InGaAs/AlAs/AlAsSb coupled quantum wells

Authors
Akiyama, T Georgiev, N Mozume, T Yoshida, H Gopal, AV Wada, O
Citation
T. Akiyama et al., Nonlinearity and recovery time of 1.55 mu m intersubband absorption in InGaAs/AlAs/AlAsSb coupled quantum wells, ELECTR LETT, 37(2), 2001, pp. 129-130
Citations number
8
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
ELECTRONICS LETTERS
ISSN journal
00135194 → ACNP
Volume
37
Issue
2
Year of publication
2001
Pages
129 - 130
Database
ISI
SICI code
0013-5194(20010118)37:2<129:NARTO1>2.0.ZU;2-6
Abstract
Values for the nonlinearity and recovery time of 1.55 mum intersubband abso rption have been experimentally obtained for the first time by using InGaAs /AlAs/AlAsSb coupled quantum wells. The third-order susceptibility (chi ((3 ))) has been evaluated to be 5.8x10-(17)m(2)/V-2. An ultrafast recovery tim e (tau) of similar to 685fs has been obtained while keeping the figure of m erit (chi ((3))/alpha tau) as large as those of interband transitions.