Journal article
A near-room-temperature all-optical polarization switch basedon the excitation of spin-polarized "virtual" carriers in quantum wells
Journal of applied physics, Vol.98(6), pp.063506-063506-4
09/20/2005
DOI: 10.1063/1.2042531
Abstract
Near-room-temperature operation of an all-optical polarization switch based on the virtual excitation of spin-polarized carriers in semiconductor quantum wells is demonstrated. The device is shown to exhibit a pulse-width-limited switching time, a contrast ratio of
>
18
dB
, an optical bandwidth of
∼
3
THz
, and an energy throughput of
>
0.1
%
using a thin (40 wells)
Ga
As
∕
Al
Ga
As
sample. The results of differential transmission measurements are used to identify the dominant switching mechanisms and to monitor the spin and temporal dynamics of the carriers excited during the operation of the switch.
Details
- Title: Subtitle
- A near-room-temperature all-optical polarization switch basedon the excitation of spin-polarized "virtual" carriers in quantum wells
- Creators
- Murat Yildirim - University of IowaJ Prineas - University of IowaEric Gansen - University of IowaArthur Smirl - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of applied physics, Vol.98(6), pp.063506-063506-4
- DOI
- 10.1063/1.2042531
- ISSN
- 0021-8979
- eISSN
- 1089-7550
- Publisher
- American Institute of Physics
- Grant note
- NSF DARPA ONR
- Date published
- 09/20/2005
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984428784502771
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