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

Authors

• Daniel Hofstetter, Institute of Physics, University of Neuchatel, 1 A.-L. Breguet, CH-2000 Neuchatel, Switzerland
• Yargo Bonetti, Institute of Physics, University of Neuchatel, 1 A.-L. Breguet, CH-2000 Neuchatel, Switzerland
• Fabrizio Giorgetta, Institute of Physics, University of Neuchatel, 1 A.-L. Breguet, CH-2000 Neuchatel, Switzerland
• Abdel-Hamid El-Shaer, Institute for Semiconductor Technology, Technical University of Braunschweig, Hans-Sommer-Strasse 66, D-38106 Braunschweig, Germany
• Andrey Bakin, Institute for Semiconductor Technology, Technical University of Braunschweig, Hans-Sommer-Strasse 66, D-38106 Braunschweig, Germany
• Andreas Waag, Institute for Semiconductor Technology, Technical University of Braunschweig, Hans-Sommer-Strasse 66, D-38106 Braunschweig, Germany
• Rudiger Schmidt-Grund, Institut für Experimentelle Physik II, University of Leipzig, Linnéstr. 5, D-04103 Leipzig, Germany
• Mathias Schubert, University of Nebraska - LincolnFollow
• Marius Grundmann, Institut für Experimentelle Physik II, University of Leipzig, Linnéstr. 5, D-04103 Leipzig, Germany

Document Type

Article

Date of this Version

2007

Comments

Published in Appl. Phys. Lett. 91, 111108 (2007). Copyright © 2007 American Institute of Physics. Used by permission.

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 Si₃N₄ layer deposited on the ZnO active region. They observed a spectral linewidth of 0.4 nm, a pump threshold intensity of 0.12 MW/cm², 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 9x10⁻⁵ K⁻¹.