Short-period GaAs-AlGaAs quantum-wire array laser with a submicrometer current blocking layer

Tae Geun Kim, Kyung Hyun Park, Eun Kyu Kim, Suk Ki Min, Jung Ho Park

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The structure and device characteristics of a 700-nm-pitch GaAs-AlGaAS quantum-wire array laser (QWAL) with a dielectric defined current blocking layer are reported. The high wire density of the QWAL has been expected to yield more efficient carrier capture, but large spacing between the quantum wires was found to deteriorate the laser characteristics. In this work, we have improved electrical confinement into the active regions by incorporating a SiO2 film onto the large spacing. Room-temperature pulsed operation with an output power of 9 mW at 191-mA injection current was achieved for a 200×500 μm laser with uncoated facet. The threshold current density was 0.14 kA/cm2. The dependence of the threshold current and the maximum power on the cavity length and width was also studied.

Original languageEnglish
Pages (from-to)2-4
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number1
Publication statusPublished - 1997 Jan

ASJC Scopus subject areas

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


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