Investigation of photonic crystal vertical－cavity surface－emitting lasers at 850nm

A photonic crystal vertical－cavity surface－emitting laser (PC-VCSEL) operating in the continuous wave mode near 850 nm has been realized for the first time in China. Various PC-VCSELs with several lattice constants and different filling fractions have been fabricated. It is found that the laser action depends crucially on the the values of the lattice constants, filling fraction, cavity size in the photonic crystal, and so forth.