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Excitation-density-dependent generation of broadband terahertz radiation in an asymmetrically excited photoconductive antenna.

Abstract:

The generation of terahertz (THz) transients in photoconductive emitters has been studied by varying the spatial extent and density of the optically excited photocarriers in asymmetrically excited, biased low-temperature-grown GaAs antenna structures. We find a pronounced dependence of the THz pulse intensity and broadband (>6.0 THz) spectral distribution on the pump excitation density and simulate this with a three-dimensional carrier dynamics model. We attribute the observed variation in...

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Publication status:
Published

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Publisher copy:
10.1364/ol.32.002297

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Journal:
Optics letters
Volume:
32
Issue:
16
Pages:
2297-2299
Publication date:
2007-08-05
DOI:
EISSN:
1539-4794
ISSN:
0146-9592
URN:
uuid:b6e0df1e-fabe-463f-939e-449fd60118a3
Source identifiers:
24581
Local pid:
pubs:24581
Language:
English

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