Optimum excitation conditions for the generation of high-electric-field terahertz radiation from an oscillator-driven photoconductive device | Zendy

A. Dreyhaupt | Zendy; Stephan Winnerl | Zendy; M. Helm | Zendy; T. Dekorsy | Zendy

Open Access

Optimum excitation conditions for the generation of high-electric-field terahertz radiation from an oscillator-driven photoconductive device

Author(s) -

A. Dreyhaupt,

Stephan Winnerl,

M. Helm,

T. Dekorsy

Publication year - 2006

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.31.001546

Subject(s) - terahertz radiation , optics , excitation , optoelectronics , electric field , wavelength , materials science , photomixing , photoconductivity , optical rectification , terahertz spectroscopy and technology , radiation , laser , amplitude , nonlinear optics , terahertz metamaterials , far infrared laser , physics , quantum mechanics

We report the impulsive generation of terahertz (THz) radiation with a field amplitude of more than 1.5 kV/cm at megahertz repetition rates, using an interdigitated photoconducting device. The approach provides an average THz power of 190 microW, corresponding to an optical-to-THz conversion efficiency of 2.5 x 10(-4). Optimum conditions are achieved when the excitation spot size is of the order of the THz wavelength.

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