Mode leakage into substrate in microdisk lasers

Physical optics
Authors:
Melnichenko Ivan A. Moiseev Eduard I. Ivanov Konstantin A. Kryzhanovskaya Natalia V. Vainilovich Alexey G. Nahorny Aliaksey V. Lutsenko Eugeniy V. Zhukov Alexey E.
Abstract:

The propagation of whispering gallery modes of a quantum-dot injection disk laser into a GaAs substrate has been investigated experimentally and using simulation. For a 50 μm diameter microlaser with 1.5-μm-thick Al0.4Ga0.6As  claddings, the intensity of the mode leaking into the substrate can be up to 10–3 of the intensity of the laser mode in the waveguide.