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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/14358

Title: Quantum dot polarized light sources
Authors: BHATTACHARYA, P
BASU, D
DAS, A
SAHA, D
Keywords: SURFACE-EMITTING LASERS
SPIN RELAXATION
MODULATION
INJECTION
SEMICONDUCTOR
DYNAMICS
DEVICE
GAIN
Issue Date: 2011
Publisher: IOP PUBLISHING LTD
Citation: SEMICONDUCTOR SCIENCE AND TECHNOLOGY,26(1)-
Abstract: The design, operation and performance of quantum dot spin-polarized vertical cavity surface emitting lasers (VCSELs) and single-photon sources are described and discussed. The effects of spin-induced gain anisotropy on output polarization and threshold current reduction have been studied along with the high-frequency response in a spin-polarized VCSEL. While the output circular polarization in a VCSEL follows the out-of-plane magnetization characteristics of the ferromagnetic spin injector, the output polarization of the spin-polarized single-photon source shows a switching behavior which is explained by invoking the exciton fine structure in the quantum dots and the effects of electron-hole exchange splitting due to in-plane quantum dot rotational asymmetry.
URI: http://dx.doi.org/10.1088/0268-1242/26/1/014002
http://dspace.library.iitb.ac.in/jspui/handle/100/14358
ISSN: 0268-1242
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