Abstract

Terahertz field-induced second-harmonic generation (TFISH) is a technique for optical detection of broadband THz fields. We show that by placing an iris at the interaction volume of the THz and optical fields, the TFISH signal increases by several tenfold in atmospheric air. The iris-assisted TFISH amplification is characterized at varying air pressures and probe intensities and provides an elegant platform for studying nonlinear phase matching in the gas phase.

© 2019 Optical Society of America

Observation of strong terahertz field-induced second harmonic generation in plasma filaments

Kareem J. Garriga Francis, Mervin Lim Pac Chong, E Yiwen, and X.-C. Zhang
Opt. Lett. 47(23) 6297-6300 (2022)

Single-shot local measurement of terahertz correlated second harmonic generation in laser air plasma filaments

Mervin Lim Pac Chong, Kareem J. Garriga Francis, E. Yiwen, and Xi-Cheng Zhang
Opt. Lett. 49(2) 226-229 (2024)

Polarization change of femtosecond laser pulses in air measured by electric-field-induced second-harmonic generation

Shin Nakamura, Takashi Fujii, Masahiro Sato, Akiko Kumada, and Yuji Oishi
Opt. Lett. 49(3) 726-729 (2024)

Terahertz-field-induced second harmonic generation through Pockels effect in zinc telluride crystal

Marion Cornet, Jérôme Degert, Emmanuel Abraham, and Eric Freysz
Opt. Lett. 39(20) 5921-5924 (2014)

Phase-matched electric-field-induced second-harmonic generation in Xe-filled hollow-core photonic crystal fiber

Jean-Michel Ménard and Philip St.J. Russell
Opt. Lett. 40(15) 3679-3682 (2015)