Mode behavior in InAs midinfrared whispering gallery lasers.

The authors report on the spectral properties of the modes in midinfrared whispering gallery lasers based on InAs. The behavior of the modes excited in cylindrical disk, pillbox, and mesa etched ridge resonators has been studied. The excitation of whispering gallery modes in these structures is found to depend strongly on the contact electrode and its location from the perimeter of the resonator. The authors also report on the threshold current and temperature sensitivity of different resonator and electrode combinations.