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American Institute of Physics, Applied Physics Letters, 11(91), p. 111108

DOI: 10.1063/1.2783965

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Demonstration of an ultraviolet ZnO-based optically pumped third order distributed feedback laser

Journal article published in 2007 by Daniel Hofstetter, Yargo Bonetti, Fabrizio R. Giorgetta, Abdel-Hamid El-Shaer, Andrey Bakin, Andreas Waag, Rüdiger Schmidt-Grund ORCID, Mathias Schubert ORCID, Marius Grundmann ORCID
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This paper is available in a repository.

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Abstract

The authors demonstrate an optically pumped ZnO distributed feedback laser operating at 383 nm . For a large temperature range between 10 and 270 K , the device lased in a single longitudinal mode. Mode selection was accomplished via a third order diffraction grating, which was dry etched into a 120 nm thick Si 3 N 4 layer deposited on the ZnO active region. They observed a spectral linewidth of 0.4 nm , a pump threshold intensity of 0.12 MW / cm 2 , and a peak output power of 14 mW . From wavelength versus temperature measurements, they deduced a temperature tuning coefficient of the ZnO refractive index of 9×10-5 K -1 .