▎ 摘　　要

NOVELTY - The laser has a nano laser which is provided with a pump light source and graphene-medium deep sub wavelength hyperbolic dispersion cavity. The graphene-medium deep sub wavelength hyperbolic dispersion cavity is a spherical or hemispherical hyperbolic dispersion micro cavity composed of a dielectric core by alternately wrapping graphene layers and dielectric layers. The pump light source is a solid laser or a semiconductor laser. The material of the dielectric layer is magnesium fluoride or silicon dioxide. The gain material is gallium arsenide, indium phosphide, cadmium sulfide, zinc oxide, gallium nitride, cadmium selenide or zinc sulfide material, or an organic material with optical gain. USE - Graphene-medium deep sub wavelength hyperbolic dispersion cavity based nano laser. ADVANTAGE - The graphene-dielectric hyperbolic dispersion metamaterial used in the nano laser because graphene plasmons have unique electrical tunability, low intrinsic loss, high optical field localization, and continuous adjustment of resonance frequency from mid-infrared to terahertz, etc. The nano laser highly localizes the energy of electromagnetic waves in a deeper sub-wavelength cavity, and reduces ohmic loss and improves the quality factor when compared with the hyperbolic dispersion characteristics of ordinary metal-medium. The spherical or hemispherical cavity based on the hyperbolic dispersion relation of the whispering gallery model proposed greatly reduces the size while achieving a high quality factor. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the nano laser based on graphene-medium deep sub wavelength hyperbolic dispersion cavity. Innermost dielectric layer (201) Graphene layer (202)