High efficient terahertz generation from two-color femtosecond laser filaments

Dogeun Jang

doi:10.1117/12.2591951

18 April 2021 High efficient terahertz generation from two-color femtosecond laser filaments

Dogeun Jang

Proceedings Volume 11778, Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources IV; 117780B (2021) https://doi.org/10.1117/12.2591951
Event: SPIE Optics + Optoelectronics, 2021, Online Only

Abstract

High-power terahertz (THz) sources are essential for many applications including THz-driven acceleration of electrons [1], molecular alignment [2], and material science [3]. Among many THz sources, a THz source with two-color laser mixing in gases has attracted much interest due to its capability of producing intense, broadband THz radiation [4]. In this scheme, a femtosecond laser pulse with its second harmonic pulse is focused to ionize a gaseous medium at the focus and create the plasma current, which can produce an intense, broadband THz pulse. With this scheme, we present an experimental study on efficient THz pulse generation from two-color laser filamentation of the mid-infrared laser pulse at 3.9 um in air. We find that mid-infrared yields higher THz energy with a laser-to-THz conversion efficiency of ~1%, which is about 10~100 times larger than conventional values with 800 nm laser pulse [4]. [1] E. A. Nanni et al., Nat. Commun. 6(1), 8486 (2015) [2] T. Kampfrath et al., Nat. Photonics 7(9), 680-690 (2013) [3] D. Nicoletti and A. Cavalleri, Adv. Opt. Photonics 8(3), 401-464 (2016). [4] D. Jang et al., Optica 6(10), 1338-1341 (2019)

Conference Presentation

Citation Download Citation

Dogeun Jang "High efficient terahertz generation from two-color femtosecond laser filaments", Proc. SPIE 11778, Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources IV, 117780B (18 April 2021); https://doi.org/10.1117/12.2591951

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