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Journal article

Effects of magnetic field and optical fluence on terahertz emission in gallium arsenide

Abstract:
The excitation density dependence of magnetic-field-enhanced terahertz (THz = 1012 Hz) emission from (100) GaAs is studied. It is found that THz power saturates at a higher optical-excitation density, when a magnetic field is applied. This observation explains the different magnetic field enhancements that have been reported recently. At low excitation densities the results are shown to be consistent with a simple model of carrier-carrier scattering, whilst at higher densities surface field screening becomes important.
Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.64.205204

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Condensed Matter Physics
Role:
Author


Journal:
Physical Review B More from this journal
Volume:
64
Issue:
20
Pages:
2052041-2052045
Publication date:
2001-11-15
DOI:
EISSN:
1095-3795
ISSN:
1098-0121


Language:
English
Pubs id:
pubs:31268
UUID:
uuid:58dbb1bd-fe76-44b7-b36f-db7aa8b1337b
Local pid:
pubs:31268
Source identifiers:
31268
Deposit date:
2012-12-19

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