| Popis: |
3D numerical simulation of intracavity-contacted oxide-confined VCSELs operating at cryogenic temperatures is reported. Spatial profiles and 3D distributions of electrical potential, current and ture are calculated. The device geometry is found to cause strong current crowding effects and nonuniformity of injected carrier distribution. Numerical experiments are performed for both spontaneous and stimulated modes of operation, and the results are compared with room-temperature simulation. Improved thermal conduction at low temperatures more than compensates for an increase in electrical resistivity, resulting in a significant reduction of active-region temperature increase at cryogenic temperatures. |
