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Terahertz emission from lateral photo-Dember currents.

Abstract:

The photo-Dember effect is a source of impulsive THz emission following femtosecond pulsed optical excitation. This emission results from the ultrafast spatial separation of electron-hole pairs in strong carrier gradients due to their different diffusion coefficients. The associated time dependent polarization is oriented perpendicular to the excited surface which is inaptly for efficient out coupling of THz radiation. We propose a scheme for generating strong carrier gradients parallel to th...

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Publication status:
Published

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Publisher copy:
10.1364/oe.18.004939

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Publisher:
Optical Society of American (OSA)
Journal:
Optics express
Volume:
18
Issue:
5
Pages:
4939-4947
Publication date:
2010-03-05
DOI:
EISSN:
1094-4087
ISSN:
1094-4087
URN:
uuid:ac9c6988-373d-42f2-8e71-1f711cfc0186
Source identifiers:
51985
Local pid:
pubs:51985
Language:
English

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