In the past decades,sum-frequency vibrational spectroscopy(SFVS)has been well established as a powerful technique for surface studies.It is based on the ide
High performance photoelectric conversion which can be detected by conventional photodetectors made of cadmium sulfide,cadmium selenide,lead sulfide and ind
Combining the telecom laser and the Erbium-doped fiber amplifier(EDFA)as well as the periodically-poled nonlinear crystals,we have realized~2.9W of single-f