Characteristics Improvement of Surface-Emitting Distributed Feedback Lasers with ITO Claddings

Kuo Bin Hong, Ting Yuan Chang, Wen Zheng Xu, Tien-chang Lu*, Shing Chung Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


In this study, significant improvements in the characteristics of the InAs quantum-dot surface-emitting distributed feedback lasers using indium tin oxide as a cladding material covered by two types of newly designed metal contacts were achieved. Laser characteristics at room temperature including I-V curves, L-I curves, near-field patterns, and lasing spectra are analyzed and discussed. We adopted a metal grating and a metal strip as p-type electrodes to improve the current distribution of the devices. Uniform laser emission in the near-field was observed. Moreover, substantial reductions in the ohmic resistance of 9.35 Ω and a low-threshold current density of 0.28 kA/cm 2 were both achieved under continuous-wave operation, leading to the prospect of high-performance surface emitting distributed feedback.

Original languageEnglish
Article number7972943
JournalIEEE Journal of Selected Topics in Quantum Electronics
Issue number6
StatePublished - 1 Nov 2017


  • distributed feedback laser
  • InAs quantum dot
  • indium tin oxide
  • metal contact layer
  • surface emitting laser

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