All-solid-state, continuous-wave, single-frequency, tunable, deep-ultraviolet coherent light source by efficient sum frequency generation with dual frequency enhancement

摘要

Manipulating the atomic motion of silicon atoms at will has been a dream for most scientists and engineers. The single-frequency light field interacting with the cyclic transition in silicon acting as a two-level atom can hold the key to the realization through the laser cooling technique, because absorption of the light leads to the transfer of momemtum from the optical field to the atom. The required laser wavelength for laser cooling of silicon atoms is 252.41 nm in the deep-UV region, which is resonant with the 3{sup left}p{sub}1 - 4s 3{sup left}p{sub}0 cyclic transition. 1) The laser power should be of the mW level for cooling and specifically, more than ten mW for practical applications of laser cooling such as atom lithography and atom holography.