[9a-N204-1~8] 4.6 Terahertz Photonics

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)English Presentation

[9a-N204-7] High-Efficiency Terahertz Harmonic Generation from Two-Dimensional MoS₂

〇(D)Youwei Wang¹, Kosaku Kato¹, Thanh Nhat Khoa Phan¹, Verdad C. Agulto¹, Mikihiko Nishitani¹, Goro Isoyama², Makoto Nakajima¹ (1.ILE, the Univ. of Osaka, 2.SANKEN, the Univ. of Osaka)

Keywords:

harmonic generation,2D material

We report the observation of terahertz (THz) harmonic generation from trilayer MoS₂ using a THz free-electron laser. Under 2.9 THz excitation, third and fifth harmonics were detected at 8.6 THz and 14.3 THz, respectively. The harmonic intensities showed cubic and quintic dependence on the pump energy, with a third harmonic conversion efficiency of 4×10^-6—comparable to graphene. Unlike graphene, MoS₂ maintains high efficiency under strong fields, making it a promising material for nonlinear THz applications.