[12p-B415-1~14] 3.6 Ultrashort-pulse and high-intensity lasers

[12p-B415-3] Third harmonic generation in the vacuum ultraviolet region using dielectric nanomembranes

〇Kuniaki Konishi^1,2, Daisuke Akai³, Yoshio Mita⁴, Makoto Ishida³, Junji Yumoto¹, Makoto Kuwata-Gonokami¹ (1.Univ. of Tokyo, 2.JST PREST, 3.Toyohashi Tech., 4.Univ of Tokyo)

Keywords:Third harmonic generation, vacuum ultraviolet, nanomembrane

A method of easily generating tunable ultrashort pulses in the vacuum ultraviolet region is required for spectroscopic applications such as time-resolved photoelectron spectroscopy and circular dichroism measurement of biomolecules. However, it is difficult to use conventional bulk nonlinear optical crystals. Here, we demonstrate that the third harmonic generation from a dielectric free-standing thin film with a thickness of several 100 nm (nanomembrane) is useful as a simple and practical method for generating vacuum ultraviolet coherent light.