5 papers
Broadband gain characterization of Co:MgF for mid-infrared femtosecond pulse amplification
Natsuki Kanda, Kaito Nishimiya, Eiji J. Takahashi
The broadband gain characteristics of Co:MgF were investigated to assess its potential as a gain medium for ultrashort-pulse amplification around the 2 m spectral region. S…
40% boost in extreme ultraviolet conversion efficiency via simultaneous dual-beam 2-μm laser irradiation
Naoki Nagahama, Kaito Nishimiya, Shunya Yamamoto +9
Scaling extreme ultraviolet (EUV) source power for next-generation lithography demands higher conversion efficiency (CE) at reduced per-pulse energies. We demonstrated a 40% CE enh…
Towards intense single-digit attosecond pulses with a 100-mJ-class mid-infrared sub-cycle laser
Kaito Nishimiya, Rambabu Rajpoot, Eiji J Takahashi
The duration of isolated attosecond pulses created via high-order harmonic generation is determined by the number of optical cycles in the driving laser. Achieving shorter attoseco…
Advances in dual-chirped optical parametric amplification
Kaito Nishimiya, Eiji J. Takahashi
High-energy infrared lasers have enabled the generation of strong field phenomena, and among such phenomena, high-order harmonic generation (HHG) from gases has enabled attosecond-…
Octave-spanning supercontinuum coherent soft X-ray for producing a single-cycle soft X-ray pulse
Kaito Nishimiya, Feng Wang, Pengfei Lan +1
This study demonstrates the potential to generate a soft X-ray single-cycle attosecond pulse using a single-cycle mid-infrared pulse from the advanced dual-chirped optical parametr…