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We report on high-energy terahertz pulses by optical rectification (OR) in the organic crystal N-benzyl-2-methyl-4-nitroaniline (BNA) directly pumped by a conventional Ti: sapphire amplifier. The simple scheme provides an optical-to-terahertz conversion efficiency of 0.25% when pumped by collimated laser pulses with duration of 50 fs and a central wavelength of 800 nm. The maximum output energy and electric field are 0.54 mu J and 0.5 MV/cm for 210 mu J optical pump [1].
Tobias Kippenberg, Nikolai Kuznetsov, Alisa Davydova, Andrey Gelash
Nicolas Grandjean, Jean-François Carlin, Camille Sophie Brès, Raphaël Butté, Samantha Sbarra, Samuele Brunetta
Tobias Kippenberg, Johann Emmeram Riemensberger, Mikhail Churaev, Nikolai Kuznetsov, Alisa Davydova, Alberto Nardi