Isolated attosecond pulses with a duration of 88as are generated in the spectral range of 29-72eV using double optical gating technique.The gate width is set to
We report high-resolution scanning tunneling microscopy (STM) study of nano-sized Pb islands grown on SrTiO3,where three distinct types of gaps with different e
Ⅲ-Ⅴ quantum dot (QD) lasers monolithically grown on CMOS-compatible Si substrates are considered as essential components for integrated silicon photonic circu