抄録
The generation of an isolated attosecond pulse (IAP) has been pioneering new breakthroughs in the field
of ultrafast science since the first measurement in 2001. Here, we review the recent technological
advances in the IAP generation from the view point of ultrabroadband attosecond continua, which
support sub-50-as pulse generation. We also introduce our studies for the IAP generation based on a
high-intensity Ti:sapphire laser system. In particular, we report the generation of the attosecond
supercontinuum spectrum with an extremely broad bandwidth of 70 eV at full width half maximum,
which suggests the generation of 32-as pulse, based on the combination of the amplitude gating and the
double optical gating schemes using the driving laser field with sub-two-cycle duration. Our approach
will be a promising method for generating the shorter IAP that achieves an improved temporal resolution
for investigating electron dynamics in unprecedented attosecond timescale.
