Abstract
Whispering-gallery-mode (WGM) lasers (emission wavelength λ = 2.1–2.4 μm) with coupled disk cavities connected by a bridge are developed on the basis of a GaInAsSb/GaAlAsSb quantum-well nano-heterostructure and their emission spectra and optical far-field patterns are studied. Almost single-mode lasing in one spatial mode is observed in a wide range of supply currents. The emission wavelength grows with increasing current due to heating of the laser, and this phenomenon can be used in diode-laser spectroscopy. An assumption is made that the flux of generated emission can pass in lasers of this kind from one cavity to the other and back along the cavity-connecting bridge. It is found that strong narrowing of the laser emission pattern occurs with increasing current near the plane separating the coupled cavities.
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Original Russian Text © A.N. Imenkov, E.A. Grebenshchikova, V.V. Sherstnev, A.A. Leonidov, N.D. Il’inskaya, O.Yu. Serebrennikova, R. Teissier, A.N. Baranov, Yu.P. Yakovlev, 2014, published in Fizika i Tekhnika Poluprovodnikov, 2014, Vol. 48, No. 10, pp. 1434–1438.
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Imenkov, A.N., Grebenshchikova, E.A., Sherstnev, V.V. et al. Electroluminescence properties of a whispering-gallery-mode laser with coupled disk cavities. Semiconductors 48, 1399–1403 (2014). https://doi.org/10.1134/S1063782614100121
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DOI: https://doi.org/10.1134/S1063782614100121