[18p-E205-1~17] 3.6 Ultrashort-pulse and high-intensity lasers

△ [18p-E205-7] Observation and generation mechanism of high-order harmonics from hybrid organic-inorganic perovskites

〇Yasuyuki Sanari¹, Hideki Hirori¹, Tomoko Aharen¹, Hirokazu Tahara¹, Yasushi Shinohara², Peiyu Xia³, Tomohito Otobe⁴, Nobuhisa Ishii³, Jiro Itatani³, Kenichi Ishikawa², Yoshihiko Kanemitsu¹ (1.ICR, Kyoto Univ., 2.Tokyo Univ., 3.ISSP, Tokyo Univ., 4.QST)

Keywords:High-order harmonic generation, Hybrid organic inorganic perovskites

The generation of high-order harmonics from hybrid organic–inorganic perovskites is observed by the excitation with a strong mid-infrared laser pulse. The high-order harmonics from the sample are more than tenfold stronger than those from the well-studied GaSe crystal despite their comparable bandgap energies. As samples, three polycrystalline thin films (MAPbX₃; MA = CH₃NH₃⁺; X = I, Br, Cl) and MAPbCl₃ single crystals were used. We clarified the generation mechanism from the crystallographic orientation and excitation intensity dependence of the high-order harmonics and the first principle calculation.