Design and simulation of metasurfaces for enhancing mid-infared photodetection

Nowadays, middle wavelength infrared (MWIR, 3–5 m) photodetectors have been applied in a variety of areas, such as communication, security, remote sensing, and medical diagnostics. However, most of MWIR photodetectors can only work under low temperature with a limited sensitivity for the light due...

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Main Author: Ma, Junhuizhi
Other Authors: Zhang Dao Hua
Format: Theses and Dissertations
Language:English
Published: 2019
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Online Access:http://hdl.handle.net/10356/78502
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-785022023-07-04T15:55:39Z Design and simulation of metasurfaces for enhancing mid-infared photodetection Ma, Junhuizhi Zhang Dao Hua School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering Nowadays, middle wavelength infrared (MWIR, 3–5 m) photodetectors have been applied in a variety of areas, such as communication, security, remote sensing, and medical diagnostics. However, most of MWIR photodetectors can only work under low temperature with a limited sensitivity for the light due to material property. At the same time, surface plasmon polaritons (SPPs) have a rapid development and attracted wide attention as they can enhance the interaction of light with matter remarkably. The photocurrent in the photodetector can be enhanced significantly by confining the light to a very small volume and promoting absorption of intense light. Thus, they can improve the detection performance owing to their strong capability of localizing electromagnetic waves in the deep subwavelength scale. In this dissertation, we used plasmonic enhancement strategy to improve the sensitivity without sacrificing the response speed. We designed several novel metallic patch structures for promoting the performance of InAs0.91Sb0.09-based heterojunction p-i-n photodiode. The corresponding simulation results using the FDTD software show that using square-shaped Al or Au patch structures excites the obvious resonance in MWIR range. Thus, they can enhance the electrical field significantly, thus leading to a better detection performance. The characteristic makes it possible for the MWIR detector to operate well under room temperature. Master of Science (Electronics) 2019-06-20T09:17:01Z 2019-06-20T09:17:01Z 2019 Thesis http://hdl.handle.net/10356/78502 en 79 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering
spellingShingle DRNTU::Engineering::Electrical and electronic engineering
Ma, Junhuizhi
Design and simulation of metasurfaces for enhancing mid-infared photodetection
description Nowadays, middle wavelength infrared (MWIR, 3–5 m) photodetectors have been applied in a variety of areas, such as communication, security, remote sensing, and medical diagnostics. However, most of MWIR photodetectors can only work under low temperature with a limited sensitivity for the light due to material property. At the same time, surface plasmon polaritons (SPPs) have a rapid development and attracted wide attention as they can enhance the interaction of light with matter remarkably. The photocurrent in the photodetector can be enhanced significantly by confining the light to a very small volume and promoting absorption of intense light. Thus, they can improve the detection performance owing to their strong capability of localizing electromagnetic waves in the deep subwavelength scale. In this dissertation, we used plasmonic enhancement strategy to improve the sensitivity without sacrificing the response speed. We designed several novel metallic patch structures for promoting the performance of InAs0.91Sb0.09-based heterojunction p-i-n photodiode. The corresponding simulation results using the FDTD software show that using square-shaped Al or Au patch structures excites the obvious resonance in MWIR range. Thus, they can enhance the electrical field significantly, thus leading to a better detection performance. The characteristic makes it possible for the MWIR detector to operate well under room temperature.
author2 Zhang Dao Hua
author_facet Zhang Dao Hua
Ma, Junhuizhi
format Theses and Dissertations
author Ma, Junhuizhi
author_sort Ma, Junhuizhi
title Design and simulation of metasurfaces for enhancing mid-infared photodetection
title_short Design and simulation of metasurfaces for enhancing mid-infared photodetection
title_full Design and simulation of metasurfaces for enhancing mid-infared photodetection
title_fullStr Design and simulation of metasurfaces for enhancing mid-infared photodetection
title_full_unstemmed Design and simulation of metasurfaces for enhancing mid-infared photodetection
title_sort design and simulation of metasurfaces for enhancing mid-infared photodetection
publishDate 2019
url http://hdl.handle.net/10356/78502
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