journal article·2018-02-01Open access

Direct bandgap type-I GeSn/GeSn quantum well on a GeSn- and Ge- buffered Si substrate

Perry C. Grant, Joe Margetis, Yiyin Zhou, Wei Dou, Grey Abernathy, Andrian Kuchuk, Wei Du, Baohua Li, John Tolle, Jifeng Liu, Greg Sun, Richard A. Soref, Mansour Mortazavi, Shui-Qing Yu

AIP Advances· Volume 8· Issue 2

Abstract

This paper reports the comprehensive characterization of a Ge0.92Sn0.08/Ge0.86Sn0.14/Ge0.92Sn0.08 single quantum well. By using a strain relaxed Ge0.92Sn0.08 buffer, the direct bandgap Ge0.86Sn0.14 QW was achieved, which is unattainable by using only a Ge buffer. Band structure calculations and optical transition analysis revealed that the quantum well features type-I band alignment. The photoluminescence spectra showed dramatically increased quantum well peak intensity at lower temperature, confirming that the Ge0.86Sn0.14 quantum well is a direct bandgap material.
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Research context

OpenAlex topics: Photonic and Optical Devices · Advanced Photonic Communication Systems · Photonic Crystals and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Arktonics LLC 1 , 1339 S. Pinnacle Dr., Fayetteville, AR 72701, USA

Microelectronics-Photonics Program, University of Arkansas 2 , Fayetteville, AR 72701, USA

Department of Electrical Engineering, University of Arkansas 3 , Fayetteville, AR 72701, USA

ASM 4 , 3440 East University Drive, Phoenix, AZ 85034, USA

Institute for Nanoscience and Engineering, University of Arkansas 5 , Fayetteville, AR 72701, USA

Department of Electrical Engineering, Wilkes University 6 , Wilkes-Barre, PA 18766, USA

Thayer School of Engineering, Dartmouth College 7 , Hanover, New Hampshire 03755, USA

Department of Engineering, University of Massachusetts Boston 8 , Boston, MA 02125, USA

Department of Chemistry and Physics, University of Arkansas at Pine Bluff 9 , Pine Bluff, AR 71601, USA

Funding

National Science Foundation · DOD | USAF | AFMC | Air Force Office of Scientific Research

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