Efficient semiconductor multicycle terahertz pulse source

Nugraha, P S and Krizsán, G and Polónyi, Gy and Mechler, M I and Hebling, J and Tóth, Gy and Fülöp, J A (2018) Efficient semiconductor multicycle terahertz pulse source. Journal of Physics B: Atomic, Molecular and Optical Physics, 51 (9). 094007. ISSN 0953-4075, ESSN: 1361-6455

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Abstract

Multicycle THz pulse generation by optical rectification in GaP semiconductor nonlinear material is investigated by numerical simulations. It is shown that GaP can be an efficient and versatile source with up to about 8% conversion efficiency and a tuning range from 0.1 THz to about 7 THz. Contact-grating technology for pulse-front tilt can ensure an excellent focusability and scaling the THz pulse energy beyond 1 mJ. Shapeable infrared pump pulses with a constant intensity-modulation period can be delivered for example by a flexible and efficient dual-chirped optical parametric amplifier. Potential applications include linear and nonlinear THz spectroscopy and THz-driven acceleration of electrons.

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