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- Title
Surface-Emitting Quantum-Cascade Lasers with a Grating Formed by Focused Ion Beam Milling.
- Authors
Babichev, A. V.; Mikhailov, D. A.; Kolodeznyi, E. S.; Gladyshev, A. G.; Voznyuk, G. V.; Mitrofanov, M. I.; Denisov, D. V.; Slipchenko, S. O.; Lyutetskii, A. V.; Dudelev, V. V.; Evtikhiev, V. P.; Karachinsky, L. Ya.; Novikov, I. I.; Sokolovskii, G. S.; Pikhtin, N. A.; Egorov, A. Yu.
- Abstract
The results of studies of 7.5–8.0 μm range surface-emitting ring quantum-cascade lasers are presented. A second- order diffraction grating with a calculated coupling coefficient of ~9 cm–1 is formed on the entire surface of the ring cavity by focused ion beam milling. Surface-emitting lasing at room temperature near 7.75 μm with a threshold current density of ~8 kA/cm2 and an outer radius of the ring cavity of 202 μm is demonstrated. The results of studying the intensity distribution in the far-field near the normal to the surface showed the presence of two maxima. It is shown that the implemented coupling coefficient is not sufficient to ensure single-mode lasing in the studied ring quantum-cascade lasers.
- Subjects
FOCUSED ion beams; SURFACE emitting lasers; ION beams; RING lasers; DIFFRACTION gratings; INTEGRAL domains
- Publication
Semiconductors, 2023, Vol 57, Issue 10, p445
- ISSN
1063-7826
- Publication type
Article
- DOI
10.1134/S1063782623090038