Title :
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
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;
Conference_Titel :
Lasers and Electro-Optics, 2000. (CLEO 2000). Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-634-6
DOI :
10.1109/CLEO.2000.907116
