Tunable, high peak power terahertz radiation from optical rectification of a short modulated laser pulse | Zendy

Dan Gordon | Zendy; A. Ting | Zendy; I. Alexeev | Zendy; R. P. Fischer | Zendy; P. Sprangle | Zendy; Christos A. Kapetenakos | Zendy; A. Zigler | Zendy

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Tunable, high peak power terahertz radiation from optical rectification of a short modulated laser pulse

Author(s) -

Dan Gordon,

A. Ting,

I. Alexeev,

R. P. Fischer,

P. Sprangle,

Christos A. Kapetenakos,

A. Zigler

Publication year - 2006

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.14.006813

Subject(s) - terahertz radiation , optics , materials science , optical rectification , laser , optoelectronics , picosecond , photomixing , far infrared laser , terahertz spectroscopy and technology , ti:sapphire laser , sapphire , nonlinear optics , physics , terahertz metamaterials

A new way of generating high peak power terahertz radiation using ultra-short pulse lasers is demonstrated. The optical pulse from a titanium:sapphire laser system is stretched and modulated using a spatial filtering technique to produce a several picosecond long pulse modulated at the terahertz frequency. A collinear type II phase matched interaction is realized via angle tuning in a gallium selenide crystal. Peak powers of at least 1.5 kW are produced in a 5 mm thick crystal, and tunability is demonstrated between 0.7 and 2.0 THz. Simulations predict that 150 kW of peak power can be produced in a 5 mm thick crystal. The technique also allows for control of the terahertz bandwidth.

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