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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 15 — Jul. 18, 2011
  • pp: 14145–14151

Room-temperature low-threshold current-injection InGaAs quantum-dot microdisk lasers with single-mode emission

Ming-Hua Mao, Hao-Che Chien, Jay-Zway Hong, and Chih-Yi Cheng  »View Author Affiliations


Optics Express, Vol. 19, Issue 15, pp. 14145-14151 (2011)
http://dx.doi.org/10.1364/OE.19.014145


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Abstract

We fabricated current-injection InGaAs quantum-dot microdisk lasers with benzocyclobutene cladding in this work. The microdisk pedestal diameter is carefully designed to facilitate carrier injection and modal control. With this structure, low threshold current of 0.45 mA is achieved at room temperature from a device of 6.5 μm in diameter with single-mode emission from quantum-dot ground states. The negative characteristic temperature T0 of threshold current is observed between 80 K and 150 K. The transition temperature from negative T0 to positive T0 is 150 K which is higher than that of the edge-emitting lasers fabricated from the same wafer. This phenomenon indicates the lower loss level of our microdisk cavities. These microdisk lasers also show positive T0 significantly higher than that of the edge-emitting lasers from the same wafer.

© 2011 OSA

OCIS Codes
(140.2020) Lasers and laser optics : Diode lasers
(140.3948) Lasers and laser optics : Microcavity devices

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: May 19, 2011
Manuscript Accepted: June 26, 2011
Published: July 8, 2011

Citation
Ming-Hua Mao, Hao-Che Chien, Jay-Zway Hong, and Chih-Yi Cheng, "Room-temperature low-threshold current-injection InGaAs quantum-dot microdisk lasers with single-mode emission," Opt. Express 19, 14145-14151 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-15-14145


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References

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