Surface Emitting Quantum-Cascade Ring Laser.

Authors :: Babichev, A. V.
Kolodeznyi, E. S.
Gladyshev, A. G.
Denisov, D. V.
Voznyuk, G. V.
Mitrofanov, M. I.
Kharin, N. Yu.
Panevin, V. Yu.
Slipchenko, S. O.
Lyutetskii, A. V.
Evtikhiev, V. P.
Karachinsky, L. Ya.
Novikov, I. I.
Pikhtin, N. A.
Egorov, A. Yu.
Source :: Semiconductors. Jul2021, Vol. 55 Issue 7, p591-594. 4p.
Publication Year :: 2021
Abstract: Quantum-cascade lasers with surface emission of radiation by means of a grating formed in the upper waveguide cladding layers by ion-beam milling are fabricated and studied. The active region of the laser heterostructure is based on the In0.53Ga0.47As/Al0.48In0.52As alloy alloys and uses a design with two-phonon resonance emptying of the lower level in the cascade. Room-temperature lasing near 7.9 μm is demonstrated for a laser with a ring-cavity diameter of 191 μm. The mode spacing in the lasing spectra corresponds to whispering-gallery modes. [ABSTRACT FROM AUTHOR]