Whispering gallery mode lasers

Abstract

The lasing of the whispering gallery modes of the microdisc are investigated theoretically by solving the Maxwell equation with the nonlinear effect of the light field on the polarization due to the lasing medium as well as the circular boundary condition. The light of the lasing modes are trapped inside the microdisc even in the case that the angle of incidence of the light to the disc boundary is smaller than the critical angle.