Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 16, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3111442
Keywords
high-temperature effects; magnetoelectronics; optical pumping; rectifiers; semiconductor quantum dots; spin polarised transport; transistors
Categories
Funding
- NSFC [60721001, 10774083]
- SRFDP [2006003047]
- [2006CB605105]
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The authors investigate the spin-polarized transport through a quantum dot irradiated by continuous circularly polarized light. For the two-terminal dot device, it is shown that sign reversal of current polarization can be modulated for a range of bias voltage. The system thus operates as a rectifier for spin-current polarization. A three-terminal device is proposed to optimize the degree of spin polarization, which can be modulated arbitrarily by polarized optical pumping in the relative large bias voltage and high temperature.
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