Electroluminescence properties of a whispering-gallery-mode laser with coupled disk cavities |
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Authors: | 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 |
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Affiliation: | 1. Ioffe Physical-Technical Institute, Russian Academy of Sciences, St. Petersburg, 194021, Russia 2. Institut d’Electronique du Sud (IES), Universite Montpellier 2, CNRS, IES (UMR CNRS 5214), 34095, Montpellier, France
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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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