[9p-M135-1~17] 3.6 Ultrashort-pulse and high-intensity lasers

[9p-M135-16] Electro-optic sampling of CEP-stable MIR pulses at 3.5 µm for sub-cycle spectroscopy in solids

〇Peiyu Xia¹, Faming Lu¹, Keisuke Kaneshima¹, Nobuhisa Ishii¹, Teruto Kanai¹, Jiro Itatani¹ (1.ISSP, the Univ. of Tokyo)

Keywords:electro-optic sampling, mid-infrared, BBO

Recently, a strong electric field exceeding 10 MV/cm can be applied to a solid without damage by using a high-energy long-wavelength laser driver. In this extremely nonlinear regime, the optical response due to the carrier dynamics in a solid plays an important role within one period of the optical electric field. Therefore, it can be expected that pump-probe spectroscopy by using a light pulse sufficiently shorter than one cycle of the long-wavelength pulses as a probe, namely sub-cycle spectroscopy, is a useful technique. In this study, in order to verify the potential of sub-cycle spectroscopy at 3.5 μm, we generated the probe pulses sufficiently shorter than one cycle (12 fs) of 3.5 μm wavelength and demonstrated an electro-optic sampling of CEP-stable high-energy MIR pulses.