Gas sensing in Kretschmann configuration utilizing bi-metallic layer of Rhodium-Silver in visible region

Akhilesh Kumar Mishra; Satyendra Kumar Mishra

doi:10.1016/j.snb.2016.07.041

Gas sensing in Kretschmann configuration utilizing bi-metallic layer of Rhodium-Silver in visible region

Akhilesh Kumar Mishra^*
, Satyendra Kumar Mishra

^*Corresponding author for this work

Department of Electrical Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

47 Citations (Scopus)

Abstract

Utilizing the ubiquitous phenomenon of surface plasmon resonance (SPR) a Magnesium Fluoride (MgF₂) prism-coupled gas sensing probe in Kretschmann configuration has been proposed and characterized. The sensing probe exhibits an extremely high sensitivity of 220°/refractive index unit (RIU) in visible region of the electromagnetic spectrum. The sensor's geometry utilizes bi-metallic layer of noble metals Rhodium (Rh) and Silver (Ag) as plasmonic metal layer. Field enhancing Silicon is used on top of the bi-metallic layer. The sensing probe is enabled for gas detection by depositing Graphene over Silicon. Graphene also contributes in field and therefore the sensitivity enhancement. Each of the constituent layers is optimized for maximum sensitivity at 632 nm wavelength for a change in the refractive index (RI) of 0.0005 RIU around the ambient RI of unity.

Original language	English
Pages (from-to)	969-973
Journal	Sensors and Actuators, B: Chemical
Volume	237
DOIs	https://doi.org/10.1016/j.snb.2016.07.041
Publication status	Published - Dec 2016

Funding

Akhilesh Kumar Mishra acknowledges the support in part at Technion by Israel Council for Higher Education.

Research Keywords

Graphene
Magnesium fluoride
Rhodium
Sensitivity
Silicon
Silver
Surface plasmon resonance

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10.1016/j.snb.2016.07.041

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title = "Gas sensing in Kretschmann configuration utilizing bi-metallic layer of Rhodium-Silver in visible region",

abstract = "Utilizing the ubiquitous phenomenon of surface plasmon resonance (SPR) a Magnesium Fluoride (MgF2) prism-coupled gas sensing probe in Kretschmann configuration has been proposed and characterized. The sensing probe exhibits an extremely high sensitivity of 220°/refractive index unit (RIU) in visible region of the electromagnetic spectrum. The sensor's geometry utilizes bi-metallic layer of noble metals Rhodium (Rh) and Silver (Ag) as plasmonic metal layer. Field enhancing Silicon is used on top of the bi-metallic layer. The sensing probe is enabled for gas detection by depositing Graphene over Silicon. Graphene also contributes in field and therefore the sensitivity enhancement. Each of the constituent layers is optimized for maximum sensitivity at 632 nm wavelength for a change in the refractive index (RI) of 0.0005 RIU around the ambient RI of unity.",

keywords = "Graphene, Magnesium fluoride, Rhodium, Sensitivity, Silicon, Silver, Surface plasmon resonance",

author = "Mishra, \{Akhilesh Kumar\} and Mishra, \{Satyendra Kumar\}",

year = "2016",

month = dec,

doi = "10.1016/j.snb.2016.07.041",

language = "English",

volume = "237",

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journal = "Sensors and Actuators, B: Chemical",

issn = "0925-4005",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Gas sensing in Kretschmann configuration utilizing bi-metallic layer of Rhodium-Silver in visible region

AU - Mishra, Akhilesh Kumar

AU - Mishra, Satyendra Kumar

PY - 2016/12

Y1 - 2016/12

N2 - Utilizing the ubiquitous phenomenon of surface plasmon resonance (SPR) a Magnesium Fluoride (MgF2) prism-coupled gas sensing probe in Kretschmann configuration has been proposed and characterized. The sensing probe exhibits an extremely high sensitivity of 220°/refractive index unit (RIU) in visible region of the electromagnetic spectrum. The sensor's geometry utilizes bi-metallic layer of noble metals Rhodium (Rh) and Silver (Ag) as plasmonic metal layer. Field enhancing Silicon is used on top of the bi-metallic layer. The sensing probe is enabled for gas detection by depositing Graphene over Silicon. Graphene also contributes in field and therefore the sensitivity enhancement. Each of the constituent layers is optimized for maximum sensitivity at 632 nm wavelength for a change in the refractive index (RI) of 0.0005 RIU around the ambient RI of unity.

AB - Utilizing the ubiquitous phenomenon of surface plasmon resonance (SPR) a Magnesium Fluoride (MgF2) prism-coupled gas sensing probe in Kretschmann configuration has been proposed and characterized. The sensing probe exhibits an extremely high sensitivity of 220°/refractive index unit (RIU) in visible region of the electromagnetic spectrum. The sensor's geometry utilizes bi-metallic layer of noble metals Rhodium (Rh) and Silver (Ag) as plasmonic metal layer. Field enhancing Silicon is used on top of the bi-metallic layer. The sensing probe is enabled for gas detection by depositing Graphene over Silicon. Graphene also contributes in field and therefore the sensitivity enhancement. Each of the constituent layers is optimized for maximum sensitivity at 632 nm wavelength for a change in the refractive index (RI) of 0.0005 RIU around the ambient RI of unity.

KW - Graphene

KW - Magnesium fluoride

KW - Rhodium

KW - Sensitivity

KW - Silicon

KW - Silver

KW - Surface plasmon resonance

UR - https://www.scopus.com/pages/publications/84978909877

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84978909877&origin=recordpage

U2 - 10.1016/j.snb.2016.07.041

DO - 10.1016/j.snb.2016.07.041

M3 - RGC 21 - Publication in refereed journal

SN - 0925-4005

VL - 237

SP - 969

EP - 973

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

ER -

Gas sensing in Kretschmann configuration utilizing bi-metallic layer of Rhodium-Silver in visible region

Abstract

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Research Keywords

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