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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 23 — Nov. 18, 2013
  • pp: 28219–28231

Electroluminescence from metal-insulator-semiconductor tunneling diodes using compressively strained Ge on Si0.5Ge0.5 virtual substrates

Santanu Manna, Rakesh Aluguri, Samaresh Das, Rajkumar Singha, and Samit K. Ray  »View Author Affiliations


Optics Express, Vol. 21, Issue 23, pp. 28219-28231 (2013)
http://dx.doi.org/10.1364/OE.21.028219


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Abstract

Direct band gap optical transition in compressively strained Ge film is demonstrated for the first time under current injection through a metal-insulator-semiconductor diode structure. The compressively strained Ge layer is grown on the relaxed Si0.5Ge0.5 substrate by solid source molecular beam epitaxy. The electroluminescence of direct band gap emission from strained Ge film and TO phonon assisted transition in Si and SiGe from the virtual substrate is observed under different current injections. The signature of heavy hole and light hole splitting in valence band is observed in the electroluminescence spectra from strained Ge layer. The temperature dependent electroluminescence characteristics have been studied over a temperature range of 10–300 K. AC frequency modulation for the Ge direct band electroluminescence has been studied to improve the emission efficiency over the DC bias.

© 2013 Optical Society of America

OCIS Codes
(230.0230) Optical devices : Optical devices
(230.0250) Optical devices : Optoelectronics

ToC Category:
Optical Devices

History
Original Manuscript: August 14, 2013
Revised Manuscript: September 19, 2013
Manuscript Accepted: September 26, 2013
Published: November 8, 2013

Citation
Santanu Manna, Rakesh Aluguri, Samaresh Das, Rajkumar Singha, and Samit K. Ray, "Electroluminescence from metal-insulator-semiconductor tunneling diodes using compressively strained Ge on Si0.5Ge0.5 virtual substrates," Opt. Express 21, 28219-28231 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-23-28219


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