Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/143847
Title: The theoretical optical gain of Ge1−xSnx nanowires
Authors: Xiong, Wen
Fan, Weijun
Song, Zhigang
Tan, Chuan Seng
Keywords: Materials Science and Engineering
Issue Date: 2020
Source: Xiong, W., Fan, W., Song, Z., & Tan, C. S. (2020). The theoretical optical gain of Ge1−xSnx nanowires. physica status solidi (RRL) – Rapid Research Letters, 14(4), 1900704-. doi:10.1002/pssr.201900704
Project: NRF-CRP19-2017-01
Journal: physica status solidi (RRL) – Rapid Research Letters
Abstract: The electronic structures of Ge1−xSnx nanowires at the direct Γ‐valley and indirect L‐valley is calculated using k·p effective‐mass theory, and the results demonstrate that Ge1−xSnx nanowires with large diameter and Sn content can easily be engineered to be the direct‐band‐gap semiconductor. Furthermore, the optical gain of Ge1−xSnx nanowires as functions of the injected electron concentration and diameter are obtained. Compared with pure Ge nanowires, a remarkable peak gain can appear in Ge1−xSnx nanowires even though the injected electron concentration decreases. This is because incorporating Sn into Ge can reduce even reverse the energy difference of minimum bandgap between the direct Γ‐valley and indirect L‐valley. Therefore, considering the free‐carrier absorption loss, one can achieve a positive net peak gain in Ge1−xSnx nanowires, which indicates that Ge1−xSnx nanowires can be used as an ideal laser diode candidate in the field of Si‐photonics.
URI: https://hdl.handle.net/10356/143847
ISSN: 1862-6270
DOI: 10.1002/pssr.201900704
Schools: School of Electrical and Electronic Engineering 
Rights: This is the accepted version of the following article: Xiong, W., Fan, W., Song, Z., & Tan, C. S. (2020). The theoretical optical gain of Ge1−xSnx nanowires. physica status solidi (RRL) – Rapid Research Letters, 14(4), 1900704-. doi:10.1002/pssr.201900704, which has been published in final form at 10.1002/pssr.201900704. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy [https://authorservices.wiley.com/authorresources/Journal-Authors/licensing/self-archiving.html].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

Files in This Item:
File Description SizeFormat 
The Theoretical Optical Gain of Ge1-xSnx Nanowires.pdf1.88 MBAdobe PDFThumbnail
View/Open

SCOPUSTM   
Citations 50

3
Updated on Mar 20, 2024

Web of ScienceTM
Citations 50

3
Updated on Oct 31, 2023

Page view(s)

281
Updated on Mar 28, 2024

Download(s) 50

108
Updated on Mar 28, 2024

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.