Design and fabrication of singular phase nanophotonic cavities for phase sensitive hydrogen sensing

Optical sensors have widely been accepted as a better alternative to electrical sensors for hydrogen sensing. For both optical and electrical sensors, palladium is commonly used for hydrogen sensing due to its high selectivity and response to hydrogen adsorption. There are many different types of op...

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主要作者: Goh, Gordon Jun Sheng
其他作者: Ranjan Singh
格式: Final Year Project
語言:English
出版: Nanyang Technological University 2021
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在線閱讀:https://hdl.handle.net/10356/148574
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spelling sg-ntu-dr.10356-1485742023-02-28T23:19:37Z Design and fabrication of singular phase nanophotonic cavities for phase sensitive hydrogen sensing Goh, Gordon Jun Sheng Ranjan Singh School of Physical and Mathematical Sciences ranjans@ntu.edu.sg Science::Physics Optical sensors have widely been accepted as a better alternative to electrical sensors for hydrogen sensing. For both optical and electrical sensors, palladium is commonly used for hydrogen sensing due to its high selectivity and response to hydrogen adsorption. There are many different types of optical hydrogen sensor whose transducing technique is based on intensity change, and spectral and angular shift. In this context, we design and fabricate singular phase nanophotonic cavities for phase sensitive hydrogen sensing. More importantly, the proposed hydrogen sensor will in theory have better response time, recovery time and limit of detection than existing hydrogen sensors. In this project, we show the basic concepts of phase sensitive hydrogen sensing by achieving singular phase at the point of darkness. By using variable-angle high resolution spectroscopic ellipsometer, we experimentally demonstrate singular phase in palladium-based cavities at the Brewster angle. Moreover, we show the detection of low concentrations of hydrogen by monitoring the phase shift due to the adsorption hydrogen. This form of hydrogen sensor does not require complex lithography to be fabricated, hence reduce the experimental complexity, and improve the reproducibility. Bachelor of Science in Applied Physics 2021-05-06T06:51:25Z 2021-05-06T06:51:25Z 2021 Final Year Project (FYP) Goh, G. J. S. (2021). Design and fabrication of singular phase nanophotonic cavities for phase sensitive hydrogen sensing. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/148574 https://hdl.handle.net/10356/148574 en application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
spellingShingle Science::Physics
Goh, Gordon Jun Sheng
Design and fabrication of singular phase nanophotonic cavities for phase sensitive hydrogen sensing
description Optical sensors have widely been accepted as a better alternative to electrical sensors for hydrogen sensing. For both optical and electrical sensors, palladium is commonly used for hydrogen sensing due to its high selectivity and response to hydrogen adsorption. There are many different types of optical hydrogen sensor whose transducing technique is based on intensity change, and spectral and angular shift. In this context, we design and fabricate singular phase nanophotonic cavities for phase sensitive hydrogen sensing. More importantly, the proposed hydrogen sensor will in theory have better response time, recovery time and limit of detection than existing hydrogen sensors. In this project, we show the basic concepts of phase sensitive hydrogen sensing by achieving singular phase at the point of darkness. By using variable-angle high resolution spectroscopic ellipsometer, we experimentally demonstrate singular phase in palladium-based cavities at the Brewster angle. Moreover, we show the detection of low concentrations of hydrogen by monitoring the phase shift due to the adsorption hydrogen. This form of hydrogen sensor does not require complex lithography to be fabricated, hence reduce the experimental complexity, and improve the reproducibility.
author2 Ranjan Singh
author_facet Ranjan Singh
Goh, Gordon Jun Sheng
format Final Year Project
author Goh, Gordon Jun Sheng
author_sort Goh, Gordon Jun Sheng
title Design and fabrication of singular phase nanophotonic cavities for phase sensitive hydrogen sensing
title_short Design and fabrication of singular phase nanophotonic cavities for phase sensitive hydrogen sensing
title_full Design and fabrication of singular phase nanophotonic cavities for phase sensitive hydrogen sensing
title_fullStr Design and fabrication of singular phase nanophotonic cavities for phase sensitive hydrogen sensing
title_full_unstemmed Design and fabrication of singular phase nanophotonic cavities for phase sensitive hydrogen sensing
title_sort design and fabrication of singular phase nanophotonic cavities for phase sensitive hydrogen sensing
publisher Nanyang Technological University
publishDate 2021
url https://hdl.handle.net/10356/148574
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