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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 14 — Jul. 2, 2012
  • pp: 14921–14927

Room-temperature electroluminescence from germanium in an Al0.3Ga0.7As/Ge heterojunction light-emitting diode by Γ-valley transport

Seongjae Cho, Byung-Gook Park, Changjae Yang, Stanley Cheung, Euijoon Yoon, Theodore I. Kamins, S. J. Ben Yoo, and James S. Harris, Jr.  »View Author Affiliations


Optics Express, Vol. 20, Issue 14, pp. 14921-14927 (2012)
http://dx.doi.org/10.1364/OE.20.014921


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Abstract

Group-IV materials for monolithic integration with silicon optoelectronic systems are being extensively studied. As a part of efforts, light emission from germanium has been pursued with the objective of evolving germanium into an efficient light source for optical communication systems. In this study, we demonstrate room-temperature electroluminescence from germanium in an Al0.3Ga0.7As/Ge heterojunction light-emitting diode without any complicated manipulation for alternating material properties of germanium. Electroluminescence peaks were observed near 1550 nm and the energy around this wavelength corresponds to that emitted from direct recombination at the Γ-valley of germanium.

© 2012 OSA

OCIS Codes
(160.3130) Materials : Integrated optics materials
(230.3670) Optical devices : Light-emitting diodes
(230.3990) Optical devices : Micro-optical devices
(230.4000) Optical devices : Microstructure fabrication
(310.3840) Thin films : Materials and process characterization

ToC Category:
Optical Devices

History
Original Manuscript: April 18, 2012
Revised Manuscript: June 6, 2012
Manuscript Accepted: June 7, 2012
Published: June 19, 2012

Citation
Seongjae Cho, Byung-Gook Park, Changjae Yang, Stanley Cheung, Euijoon Yoon, Theodore I. Kamins, S. J. Ben Yoo, and James S. Harris, "Room-temperature electroluminescence from germanium in an Al0.3Ga0.7As/Ge heterojunction light-emitting diode by Γ-valley transport," Opt. Express 20, 14921-14927 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-14-14921


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