Lasing in Zn-doped GaAs nanowires on an iron film

In this work, we demonstrate optically pumped lasing in highly Zn-doped GaAs nanowires lying on an iron film. The conically shaped nanowires 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...

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Bibliographic Details
Published in:Nanotechnology 2023-10, Vol.34 (44), p.445201
Main Authors: Aman, Gyanan, Lysevych, Mykhaylo, Tan, Hark Hoe, Jagadish, Chennupati, Schmitzer, Heidrun, Fränzl, Martin, Cahay, Marc, Wagner, Hans Peter
Format: Article
Language:English
Subjects:
hybrid photonic-plasmonic
iron
magnetic modulation
nano-lasers
single mode
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Summary:In this work, we demonstrate optically pumped lasing in highly Zn-doped GaAs nanowires lying on an iron film. The conically shaped nanowires 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 nanowires 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 nanowire/iron film interface for the lasing modes. The high Zn acceptor concentration in the nanowires provides enhanced radiative efficiency and enables lasing on the iron film despite plasmonic losses. Our results open avenues for integrating nanowire lasers on ferromagnetic substrates to achieve new functionalities, such as magnetic field-induced modulation.&#xD.
ISSN:0957-4484
1361-6528
DOI:10.1088/1361-6528/ace914