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Effects of Device Geometry on Output Circular Polarization in a Spin-LED

DSpace at IIT Bombay

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Title Effects of Device Geometry on Output Circular Polarization in a Spin-LED
 
Creator BANERJEE, D
ADARI, RBR
PRAMANIK, T
GANGULY, S
SAHA, D
 
Subject Spin electronics
spin injection
spin light-emitting diode
spin transport theory
 
Description A surface emitting spin-polarized light emitting diode (Spin-LED) is considered for the study of the device geometry dependence of the output circular polarization It is found that the output circular polarization is maximum at the outer region of the circular non-FM Ohmic contact to the p-region, which delineates radial extent of the active region in the intrinsic layer. We observe that the output circular polarization increase as a function of the p-contact radius when the contact size is small but for large values of the p-contact radius the reverse trend is noted. An enhancement of the spin diffusion length increases the degree of polarization of the emitted circular light. The enhancement however is observed to fall off for still higher values of spin lifetime.
 
Publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
 
Date 2014-10-17T05:09:57Z
2014-10-17T05:09:57Z
2012
 
Type Article; Proceedings Paper
 
Identifier IEEE TRANSACTIONS ON MAGNETICS, 48(11)2761-2764
http://dx.doi.org/10.1109/TMAG.2012.2195649
http://dspace.library.iitb.ac.in/jspui/handle/100/16031
 
Language en