Lasing in Zn-doped GaAs nanowires on an iron film

Gyanan Aman; Mykhaylo Lysevych; Hark Hoe Tan; Chennupati Jagadish; Heidrun Schmitzer; Martin Fränzl; Marc Cahay; Hans Peter Wagner

doi:10.1088/1361-6528/ace914

Lasing in Zn-doped GaAs nanowires on an iron film

Gyanan Aman, Mykhaylo Lysevych, Hark Hoe Tan, Chennupati Jagadish, Heidrun Schmitzer, Martin Fränzl, Marc Cahay, Hans Peter Wagner^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	445201
Journal	Nanotechnology
Volume	34
Issue number	44
DOIs	https://doi.org/10.1088/1361-6528/ace914
Publication status	Published - 30 Oct 2023

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title = "Lasing in Zn-doped GaAs nanowires on an iron film",

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.",

keywords = "hybrid photonic-plasmonic, iron, magnetic modulation, nano-lasers, single mode",

author = "Gyanan Aman and Mykhaylo Lysevych and Tan, {Hark Hoe} and Chennupati Jagadish and Heidrun Schmitzer and Martin Fr{\"a}nzl and Marc Cahay and Wagner, {Hans Peter}",

note = "Publisher Copyright: {\textcopyright} 2023 The Author(s). Published by IOP Publishing Ltd.",

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doi = "10.1088/1361-6528/ace914",

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T1 - Lasing in Zn-doped GaAs nanowires on an iron film

AU - Aman, Gyanan

AU - Lysevych, Mykhaylo

AU - Tan, Hark Hoe

AU - Jagadish, Chennupati

AU - Schmitzer, Heidrun

AU - Fränzl, Martin

AU - Cahay, Marc

AU - Wagner, Hans Peter

PY - 2023/10/30

Y1 - 2023/10/30

N2 - 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.

AB - 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.

KW - hybrid photonic-plasmonic

KW - iron

KW - magnetic modulation

KW - nano-lasers

KW - single mode

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U2 - 10.1088/1361-6528/ace914

DO - 10.1088/1361-6528/ace914

M3 - Article

SN - 0957-4484

VL - 34

JO - Nanotechnology

JF - Nanotechnology

IS - 44

M1 - 445201

ER -

Lasing in Zn-doped GaAs nanowires on an iron film

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