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The Simulation of a Surface Plasmon Resonance Metallic Grating for Maximizing THz Sensitivity in Refractive Index Sensor Application
Joint Authors
Sathukarn, Asmar
Jia yi, Chia
Boonruang, Sakoolkan
Tantiwanichapan, Khwanchai
Prasertsuk, Kiattiwut
Thanapirom, Chayut
Kusolthossakul, Woraprach
Kasamsook, Kittipong
Horprathum, M.
Source
International Journal of Optics
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-01-16
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Nowadays, the simplicity of both designing and fabrication process of a terahertz (THz) resonator-based sensing technique leads to its ongoing development.
The consumable THz resonator needs to be easily integrated into an existing terahertz time domain spectroscopy (THz TDS) measurement system.
It should also be able to be fabricated in a mass scale with a low production cost.
In this work, a metal-coated surface plasmon resonance- (SPR-) based sensor is simulated and designed as a low-cost refractive index sensor utilizing rigorous coupled wave analysis (RCWA).
To demonstrate our methodology, we design a gold-coated grating with a polydimethylsiloxane (PDMS) as a substrate, in order to perform quantitative analysis of gasoline-toluene mixture composition, which has a refraction index variation of 0.1 at THz frequency.
The grating period is tuned such that its surface plasmon resonance (SPR) frequency matches with the peak frequency of the THz TDS system.
Moreover, other grating parameters, i.e., a filling factor and a grating depth, are optimized to increase the sensor sensitivity and sharpen the resonance dip.
High sensitivity up to 500 GHz/RIU with a refractive index resolution up to 0.01 is numerically revealed.
The H-field of the designed grating is then evaluated to indicate a strong SPR excitation.
The well-developed designed grating introduces a promising, low-cost, and easily fabricated THz refractive index sensor.
American Psychological Association (APA)
Sathukarn, Asmar& Jia yi, Chia& Boonruang, Sakoolkan& Horprathum, M.& Tantiwanichapan, Khwanchai& Prasertsuk, Kiattiwut…[et al.]. 2020. The Simulation of a Surface Plasmon Resonance Metallic Grating for Maximizing THz Sensitivity in Refractive Index Sensor Application. International Journal of Optics،Vol. 2020, no. 2020, pp.1-8.
https://search.emarefa.net/detail/BIM-1172905
Modern Language Association (MLA)
Sathukarn, Asmar…[et al.]. The Simulation of a Surface Plasmon Resonance Metallic Grating for Maximizing THz Sensitivity in Refractive Index Sensor Application. International Journal of Optics No. 2020 (2020), pp.1-8.
https://search.emarefa.net/detail/BIM-1172905
American Medical Association (AMA)
Sathukarn, Asmar& Jia yi, Chia& Boonruang, Sakoolkan& Horprathum, M.& Tantiwanichapan, Khwanchai& Prasertsuk, Kiattiwut…[et al.]. The Simulation of a Surface Plasmon Resonance Metallic Grating for Maximizing THz Sensitivity in Refractive Index Sensor Application. International Journal of Optics. 2020. Vol. 2020, no. 2020, pp.1-8.
https://search.emarefa.net/detail/BIM-1172905
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1172905