We demonstrate theoretically a 2D subwavelength silicon-grating reflector with strong focusing capability and the potential application to an optical dipole trap of cold molecules such as MgF. We study the dependence of the focusing properties of this reflector on its structural parameters, numerical aperture, and fabrication-error tolerance. Our study shows that the reflector delivers high reflectivity and strong focusing performances with the maximum intensity at the focal point over 200 times the incident one. Such a focusing field on the reflector can provide a deep potential to trap cold MgF molecules from a standard magneto-optical trap.
The self-stimulated Raman laser operation of a Nd:Lu0.99La0.01VO4 new crystal is presented. A 0.3 at.% Nd doped Lu0.99La0.01VO4 crystal in dimensions 3 × 3 × 20 mm 3 is adopted as the self-stimulated Raman crystal. At a pulse repetition frequency of 14 kHz, average output powers of 240 mW for the first Stokes light at 1181 nm and 660 mW for the fundamental light at 1068 nm are obtained under an incident pump power of 5.5 W. The pulse widths of the first Stokes light and fundamental light are about 15 and 25 ns. The slope efficiencies are about 12.7% and 18.8% with respect to the incident pump power.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.