Very long wavelength (λ ≃ 16 µm)whispering gallery mode microdisk lasers

Abstract
The longest wavelength whispering gallery semiconductor disk lasers fabricated to date are reported. The devices operate at λ ≃ 16 µm up to a temperature of ~120 K. They employ the quantum cascade scheme based on interminiband transitions in graded superlattices and are realised in the InGaAs/AlInAs material system.