Open AccessBroadband terahertz solid-state emitter driven by Yb:YAG thin-disk oscillator
Author(s) -
Gaia Barbiero,
Haochuan Wang,
Jonathan Brons,
Bo-Han Chen,
Vladimir Pervak,
Hanieh Fattahi
Publication year - 2020
Publication title -
journal of physics. b, atomic molecular and optical physics/journal of physics. b, atomic, molecular and optical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 121
eISSN - 1361-6455
pISSN - 0953-4075
DOI - 10.1088/1361-6455/ab8049
Subject(s) - terahertz radiation , materials science , optoelectronics , common emitter , optics , backward wave oscillator , broadband , laser , gallium phosphide , physics , electron , quantum mechanics , cathode ray
We report on a table-top, high-power, terahertz (THz) solid-state emitter driven by few-cycle near-infrared pulses at 16 MHz repetition rate in gallium phosphide (GaP) crystals. Two external nonlinear multi-pass cells are used to shorten the output of a home-built, 100 W, 265 fs, 6.2 μ J Yb:YAG thin-disk oscillator, operating at 1030 nm, to 18 fs with 3.78 μ J pulse energy. The broadband spectrum of the THz driver allowed for the extension of the THz cutoff frequency to 5.7 THz at the dynamic range of 10 4 . By employing the high-power Yb:YAG thin-disk oscillator, the low efficiency of the THz generation is circumvented, resulting in the generation of up to 100 μ W, multi-octave THz pulses at 5 THz cutoff frequency in a 2 mm thick GaP crystal.