Lasing in Zn-doped GaAs nanowires on an iron film
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Published:2023-08-16
Issue:44
Volume:34
Page:445201
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ISSN:0957-4484
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Container-title:Nanotechnology
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language:
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Short-container-title:Nanotechnology
Author:
Aman GyananORCID,
Lysevych Mykhaylo,
Tan Hark Hoe,
Jagadish Chennupati,
Schmitzer Heidrun,
Fränzl Martin,
Cahay MarcORCID,
Wagner Hans PeterORCID
Abstract
Abstract
In this work, we demonstrate optically pumped lasing in highly Zn-doped GaAs nanowires (NWs) lying on an iron film. The conically shaped NWs are first covered with an 8 nm thick Al2O3 film to prevent atmospheric oxidation and mitigate band-bending effects. Multimode and single-mode lasing have been observed for NWs with a length greater or smaller than 2 μm, respectively. Finite difference time domain calculations reveal a weak electric field enhancement in the Al2O3 layer at the NW/iron film interface for the lasing modes. The high Zn acceptor concentration in the NWs provides enhanced radiative efficiency and enables lasing on the iron film despite plasmonic losses. Our results open avenues for integrating NW lasers on ferromagnetic substrates to achieve new functionalities, such as magnetic field-induced modulation.
Funder
National Science Foundation
University Research Council (URC) at the University of Cincinnati
John Hauck Foundation
The Australian Research Council
the Australian National Fabrication Facility, ACT
Subject
Electrical and Electronic Engineering,Mechanical Engineering,Mechanics of Materials,General Materials Science,General Chemistry,Bioengineering