Impulsive terahertz radiation with high electric fields from an amplifier-driven large-area photoconductive antenna | Zendy

Mattias Beck | Zendy; H. Schäfer | Zendy; G. Klatt | Zendy; J. Demšar | Zendy; S. Winnerl | Zendy; M. Helm | Zendy; T. Dekorsy | Zendy

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Impulsive terahertz radiation with high electric fields from an amplifier-driven large-area photoconductive antenna

Author(s) -

Mattias Beck,

H. Schäfer,

G. Klatt,

J. Demšar,

S. Winnerl,

M. Helm,

T. Dekorsy

Publication year - 2010

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.18.009251

Subject(s) - terahertz radiation , optics , materials science , amplifier , optoelectronics , common emitter , photomixing , laser , antenna (radio) , electric field , radiation , beam (structure) , physics , far infrared laser , telecommunications , terahertz metamaterials , cmos , quantum mechanics , computer science

We report on the generation of impulsive terahertz (THz) radiation with 36 kV/cm vacuum electric field (1.5 mW average thermal power) at 250 kHz repetition rate and a high NIR-to-THz conversion efficiency of 2 x 10(-3). This is achieved by photoexciting biased large-area photoconductive emitter with NIR fs pulses of microJ pulse energy. We demonstrate focussing of the THz beam by tailoring the pulse front of the exciting laser beam without any focussing element for the THz beam. A high dynamic range of 10(4) signal-to-noise is obtained with an amplifier based system.

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