Design and optimization of mid-infrared hot electron detector based on Al/GaAs fishnet nanostructure for CO2 sensing

Sihong Zhou; Yanming Guo; Cheng Zhang; Qinghui Pan; Qian Zhou; Yong Shuai

doi:10.1364/AO.456247

Design and optimization of mid-infrared hot electron detector based on Al/GaAs fishnet nanostructure for CO₂ sensing

Sihong Zhou
, Yanming Guo
, Cheng Zhang
, Qinghui Pan
, Qian Zhou
, Yong Shuai^*

^*Corresponding author for this work

School of Energy Science and Engineering

Harbin Institute of Technology
School of Energy Science and Engineering, Harbin Institute of Technology

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

1 Scopus citations

Abstract

Hot electron detectors (HEDs) based on plasmon resonance can circumvent a semiconductor’s bandgap limitation and have high sensitivity, suitable for infrared gas detectors. Unfortunately, there are few literature reports on research in the mid-infrared (MIR) region. Herein, we design and optimize a HED based on Al/GaAs fishnet nanostructure for MIR CO₂ sensing, and its optical–electrical properties are numerically studied. Surface plasmons not only achieve strong absorptance at CO₂ emission wavelength but also greatly improve the photoelectric responsivity over a plane structure detector (∼42 times). By changing the thickness of the GaAs layer, the detection wavelength can also be actively adjusted, achieving a larger range of multi-gas detection. The effect of external voltage is also considered. This work highlights a potential engineering application value and offers a path toward more compact and efficient MIR gas detectors.

Original language	English
Pages (from-to)	4270-4277
Number of pages	8
Journal	Applied Optics
Volume	61
Issue number	15
DOIs	https://doi.org/10.1364/AO.456247
State	Published - 20 May 2022

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title = "Design and optimization of mid-infrared hot electron detector based on Al/GaAs fishnet nanostructure for CO2 sensing",

abstract = "Hot electron detectors (HEDs) based on plasmon resonance can circumvent a semiconductor{\textquoteright}s bandgap limitation and have high sensitivity, suitable for infrared gas detectors. Unfortunately, there are few literature reports on research in the mid-infrared (MIR) region. Herein, we design and optimize a HED based on Al/GaAs fishnet nanostructure for MIR CO2 sensing, and its optical–electrical properties are numerically studied. Surface plasmons not only achieve strong absorptance at CO2 emission wavelength but also greatly improve the photoelectric responsivity over a plane structure detector (∼42 times). By changing the thickness of the GaAs layer, the detection wavelength can also be actively adjusted, achieving a larger range of multi-gas detection. The effect of external voltage is also considered. This work highlights a potential engineering application value and offers a path toward more compact and efficient MIR gas detectors.",

author = "Sihong Zhou and Yanming Guo and Cheng Zhang and Qinghui Pan and Qian Zhou and Yong Shuai",

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T1 - Design and optimization of mid-infrared hot electron detector based on Al/GaAs fishnet nanostructure for CO2 sensing

AU - Zhou, Sihong

AU - Guo, Yanming

AU - Zhang, Cheng

AU - Pan, Qinghui

AU - Zhou, Qian

AU - Shuai, Yong

PY - 2022/5/20

Y1 - 2022/5/20

N2 - Hot electron detectors (HEDs) based on plasmon resonance can circumvent a semiconductor’s bandgap limitation and have high sensitivity, suitable for infrared gas detectors. Unfortunately, there are few literature reports on research in the mid-infrared (MIR) region. Herein, we design and optimize a HED based on Al/GaAs fishnet nanostructure for MIR CO2 sensing, and its optical–electrical properties are numerically studied. Surface plasmons not only achieve strong absorptance at CO2 emission wavelength but also greatly improve the photoelectric responsivity over a plane structure detector (∼42 times). By changing the thickness of the GaAs layer, the detection wavelength can also be actively adjusted, achieving a larger range of multi-gas detection. The effect of external voltage is also considered. This work highlights a potential engineering application value and offers a path toward more compact and efficient MIR gas detectors.

AB - Hot electron detectors (HEDs) based on plasmon resonance can circumvent a semiconductor’s bandgap limitation and have high sensitivity, suitable for infrared gas detectors. Unfortunately, there are few literature reports on research in the mid-infrared (MIR) region. Herein, we design and optimize a HED based on Al/GaAs fishnet nanostructure for MIR CO2 sensing, and its optical–electrical properties are numerically studied. Surface plasmons not only achieve strong absorptance at CO2 emission wavelength but also greatly improve the photoelectric responsivity over a plane structure detector (∼42 times). By changing the thickness of the GaAs layer, the detection wavelength can also be actively adjusted, achieving a larger range of multi-gas detection. The effect of external voltage is also considered. This work highlights a potential engineering application value and offers a path toward more compact and efficient MIR gas detectors.

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Design and optimization of mid-infrared hot electron detector based on Al/GaAs fishnet nanostructure for CO₂ sensing

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