ZnO-ZnMgO multiple quantum-well ridge waveguide lasers

Siu Hon Tsang, Siu Fung Yu, Hui Ying Yang, Hou Kun Liang, Xiaofeng Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)


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-1at a pump intensity of 2 MW/ cm2.
Original languageEnglish
Pages (from-to)1624-1626
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number21
Publication statusPublished - 1 Nov 2009
Externally publishedYes


  • Filtered cathodic vacuum arc (FCVA) deposition technique
  • Quantum wells (QWs)
  • Ridge waveguide lasers
  • ZnO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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