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Title: Design and Simulation of a Palladium-Aluminum Nanostructure-Based Hydrogen Sensor With Improved Figure of Merit
Authors: Bijalwan A.
Rastogi, Vipul K.
Published in: IEEE Sensors Journal
Abstract: We present Palladium (Pd) and Aluminum (Al) nanostructure-based hydrogen sensor in infrared region. Dip strength, full width half maximum, and figure of merit (FOM) are considered for designing the sensor. We numerically demonstrated Pd and Al combination is the appropriate choice for hydrogen sensing as it provides narrow reflection curve in comparison to the reflection curves of Pd-Au combination. Replacing Au by Al, FOM becomes twice. To further improve the performance of the sensor, we optimize the Pd grating depth using rigorous coupled wave analysis method. Using optimized grating depth, FOM could be increased to about 25%. Duty cycle of the structure has also been optimized. FOM of the sensor with optimized parameters is 0.343, and which is about six times higher than that of previously reported grating-based sensor. This proposed sensor can be used for remote sensing of hydrogen gas. © 2019 IEEE.
Citation: IEEE Sensors Journal (2019), 19(15): 6112-6118
Issue Date: 2019
Publisher: Institute of Electrical and Electronics Engineers Inc.
Keywords: gas detectors
optical sensors
ISSN: 1530437X
Author Scopus IDs: 57193803914
Author Affiliations: Bijalwan, A., Department of Physics, Indian Institute of Technology Roorkee, Roorkee, India
Rastogi, V., Department of Physics, Indian Institute of Technology Roorkee, Roorkee, India
Corresponding Author: Bijalwan, A.; Department of Physics, Indian Institute of Technology RoorkeeIndia; email:
Appears in Collections:Journal Publications [PH]

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