Numerical investigation of a plasmonic slot waveguide for CO2 sensing application

Parviz Saeidi; Bernhard Jakoby; Gerald Pühringer; Andreas Tortschanoff; Gerald Stocker; Jasmin Spettel; Florian Dubois; Thomas Grille; Reyhaneh Jannesari

Numerical investigation of a plasmonic slot waveguide for CO2 sensing application

Parviz Saeidi, Bernhard Jakoby, Gerald Pühringer, Andreas Tortschanoff, Gerald Stocker, Jasmin Spettel, Florian Dubois, Thomas Grille, Reyhaneh Jannesari

Photonic Systems (PHOS)

Research output: Contribution to conference (No Proceedings) › Poster

Abstract

In this work, a sensor based on a plasmonic slot waveguide (PSWG) is
numerically designed and investigated. The sensor consists of a gold PSWG
on a silicon oxide substrate which is coated with a thin silicon nitride layer.
The waveguide was optimized using COMSOL Multiphysics based on the
finite element method for a wavelength of 4.26 µm. This wavelength
corresponds to the center of the mid-infrared absorption lines of CO2 gas
representing a typical sensing application. A figure of merit (FOM), which is
given by a product of confinement factor and propagation length, i.e. two
crucial parameters for sensing applications, was calculated. To characterize
the propagation length, the imaginary part of the effective mode index of a
guided mode is considered, resulting in a dimensionless FOM. The best FOM
for the optimized parameters is 70.1.

Original language	English
Publication status	Published - 1 Jun 2022
Event	Microelectronic System Symposium - Hasu der Ingenieure, Eschenbachgasse 9, Vienna, Austria Duration: 1 Jun 2022 → 2 Jun 2022 http://www.mess.co.at/

Conference

Conference	Microelectronic System Symposium
Abbreviated title	MESS22
Country/Territory	Austria
City	Vienna
Period	1/06/22 → 2/06/22
Internet address	http://www.mess.co.at/

Cite this

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title = "Numerical investigation of a plasmonic slot waveguide for CO2 sensing application",

abstract = "In this work, a sensor based on a plasmonic slot waveguide (PSWG) isnumerically designed and investigated. The sensor consists of a gold PSWGon a silicon oxide substrate which is coated with a thin silicon nitride layer.The waveguide was optimized using COMSOL Multiphysics based on thefinite element method for a wavelength of 4.26 µm. This wavelengthcorresponds to the center of the mid-infrared absorption lines of CO2 gasrepresenting a typical sensing application. A figure of merit (FOM), which isgiven by a product of confinement factor and propagation length, i.e. twocrucial parameters for sensing applications, was calculated. To characterizethe propagation length, the imaginary part of the effective mode index of aguided mode is considered, resulting in a dimensionless FOM. The best FOMfor the optimized parameters is 70.1.",

author = "Parviz Saeidi and Bernhard Jakoby and Gerald P{\"u}hringer and Andreas Tortschanoff and Gerald Stocker and Jasmin Spettel and Florian Dubois and Thomas Grille and Reyhaneh Jannesari",

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TY - CONF

T1 - Numerical investigation of a plasmonic slot waveguide for CO2 sensing application

AU - Saeidi, Parviz

AU - Jakoby, Bernhard

AU - Pühringer, Gerald

AU - Tortschanoff, Andreas

AU - Stocker, Gerald

AU - Spettel, Jasmin

AU - Dubois, Florian

AU - Grille, Thomas

AU - Jannesari, Reyhaneh

PY - 2022/6/1

Y1 - 2022/6/1

N2 - In this work, a sensor based on a plasmonic slot waveguide (PSWG) isnumerically designed and investigated. The sensor consists of a gold PSWGon a silicon oxide substrate which is coated with a thin silicon nitride layer.The waveguide was optimized using COMSOL Multiphysics based on thefinite element method for a wavelength of 4.26 µm. This wavelengthcorresponds to the center of the mid-infrared absorption lines of CO2 gasrepresenting a typical sensing application. A figure of merit (FOM), which isgiven by a product of confinement factor and propagation length, i.e. twocrucial parameters for sensing applications, was calculated. To characterizethe propagation length, the imaginary part of the effective mode index of aguided mode is considered, resulting in a dimensionless FOM. The best FOMfor the optimized parameters is 70.1.

AB - In this work, a sensor based on a plasmonic slot waveguide (PSWG) isnumerically designed and investigated. The sensor consists of a gold PSWGon a silicon oxide substrate which is coated with a thin silicon nitride layer.The waveguide was optimized using COMSOL Multiphysics based on thefinite element method for a wavelength of 4.26 µm. This wavelengthcorresponds to the center of the mid-infrared absorption lines of CO2 gasrepresenting a typical sensing application. A figure of merit (FOM), which isgiven by a product of confinement factor and propagation length, i.e. twocrucial parameters for sensing applications, was calculated. To characterizethe propagation length, the imaginary part of the effective mode index of aguided mode is considered, resulting in a dimensionless FOM. The best FOMfor the optimized parameters is 70.1.

M3 - Poster

T2 - Microelectronic System Symposium

Y2 - 1 June 2022 through 2 June 2022

ER -

Numerical investigation of a plasmonic slot waveguide for CO2 sensing application

Abstract

Conference

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