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

Author

Akiyama, T. ; Georgiev, N. ; Mozume, T. ; Yoshida, H. ; Gopal, A.V. ; Wada, O.

Author_Institution

The Femtosecond Technol. Res. Assoc., Tsukuba, Japan

fYear

2001

fDate

11-11 May 2001

Firstpage

18

Lastpage

19

Abstract

Summary form only given. The demand for the optical nonlinear devices which operate around the optical communication wavelengths has been increasing because of their applicability to the time-domain switching, wavelength conversion, and regeneration. Intersubband (ISB) transition is one of the candidates for that use because it is expected to have an ultrafast response. In this paper, we evaluate the nonlinearity and the response time for the first time in 1.55 /spl mu/m ISB absorption, which was achieved by InGaAs/AlAs/AlAsSb coupled quantum wells.

Keywords

III-V semiconductors; absorption coefficients; aluminium compounds; gallium arsenide; indium compounds; optical saturable absorption; optical wavelength conversion; quantum well devices; semiconductor quantum wells; 1.55 micron; InGaAs-AlAs-AlAsSb; absorption saturation; conduction band; coupled quantum wells; intersubband absorption; intersubband transition; nonlinear absorption coefficient; optical confinement factor; optical nonlinear devices; pump-probe measurement; regeneration; response time; time-domain switching; transmissivity spectrum; ultrafast decay curve; ultrafast nonlinear devices; wavelength conversion; Communication switching; Delay; Nonlinear optical devices; Nonlinear optics; Optical devices; Optical fiber communication; Optical wavelength conversion; Repeaters; Time domain analysis; Ultrafast optics;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2001. CLEO '01. Technical Digest. Summaries of papers presented at the Conference on

Conference_Location

Baltimore, MD, USA

Print_ISBN

1-55752-662-1

Type

conf

DOI

10.1109/CLEO.2001.947408

Filename

947408