ZnO-ZnMgO Multiple Quantum-Well Ridge Waveguide Lasers

• Published in: IEEE photonics technology letters Vol. 21; no. 21; pp. 1624 - 1626
• Main Authors: Siu Hon Tsang, Siu Hon Tsang, Siu Fung Yu, Siu Fung Yu, Hui Ying Yang, Hui Ying Yang, Hou Kun Liang, Hou Kun Liang, Xiaofeng Li, Xiaofeng Li
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.11.2009; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Filtered cathodic vacuum arc (FCVA) deposition technique; Optical films; Optical filters; Optical pumping; Optical scattering; Optical waveguides; Quantum well devices; Quantum well lasers; quantum wells (QWs); ridge waveguide lasers; Stimulated emission; Transistors; Waveguide lasers; ZnO
• ISSN: 1041-1135; 1941-0174
• DOI: 10.1109/LPT.2009.2031089

ZnO-ZnMgO multiple quantum-well (MQW) thin-film waveguides with ridge structures have been fabricated on quartz substrates. Low-temperature deposition of high-quality ZnO-ZnMgO MQW thin films was achieved by filtered cathodic vacuum arc technique. A ridge is defined on the thin film by plasma etching. Room-temperature lasing with a peak wavelength at 378 nm of 1.5-nm well width was observed under 355-nm optical excitation. Exciton-exciton scattering was attributed to the amplified spontaneous emission observed from the MQW waveguide. The net optical gain can be larger than 80 cm -1 at a pump intensity of 2 MW/cm 2 .