Polarization switching and long lived circular dichroism in InGaAsP multiple quantum wells at 1.525 microns

Author

Marshall, D. ; Mazilu, Michael ; Ebrahimzadeh, M. ; Miller, A. ; Button, C.

Author_Institution

Dept. of Phys. & Astron., St. Andrews Univ., UK

fYear

2000

fDate

7-12 May 2000

Firstpage

359

Lastpage

360

Abstract

Summary form only given. Unexpectedly long lifetime circular dichroism has been observed in InGaAsP multiple quantum wells (MQW) at room temperature after creation of spin-polarized electrons. This has been investigated using the pump-probe technique with circularly polarized pump and linearly polarized probe pulses. We observe signals of opposite sign when using left or right circular polarization. We investigate this by measuring the rotation and ellipticity of the probe pulse train.

Keywords

III-V semiconductors; dichroism; excitons; gallium arsenide; gallium compounds; indium compounds; light polarisation; optical pumping; optical rotation; optical switches; semiconductor quantum wells; 1.525 mum; InGaAsP; InGaAsP multiple quantum wells; circularly polarized pump pulses; ellipticity; left circular polarization; linearly polarized probe pulses; long lifetime circular dichroism; long lived circular dichroism; opposite sign signals; polarization switching; probe pulse train; pump-probe technique; right circular polarization; room temperature; spin-polarized electrons; Anodes; Delay; Inspection; Large Hadron Collider; Photoconductivity; Polarization; Probes; Solids; Switches; Visualization;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2000. (CLEO 2000). Conference on

Conference_Location

San Francisco, CA, USA

Print_ISBN

1-55752-634-6

Type

conf

DOI

10.1109/CLEO.2000.907116

Filename

907116