Nanoblocks embedded in L-shaped nanocavity of a plasmonic sensor for best sensor performance

• Autorzy: Butt M. A. , Kazanskiy N. L.

Identyfikatory

DOI

10.37190/oa210109

• Języki publikacji: EN

Abstrakty

EN

In this work, we proposed a highly sensitive design of a plasmonic sensor which is formed by embedding a periodic array of nanoblocks in L-shaped cavity formed by the metal–insulator–metal waveguide. The nanoblocks are placed in the strong electric field confinement region to further enhance its strength by confining it to a small area. To validate the study, the spectral characteristics of the proposed sensor design is compared to the spectral characteristics of a standard design having the same geometric parameters excluding nanoblocks in the cavity. The study shows that the incorporation of 5 nanoblocks of length 25 nm in the cavity can provide best performance indicators in the form of sensitivity, figure of merit and Q-factor. The sensitivity, figure of merit and Q-factor of the proposed sensor design is 1065 nm/RIU, 251.17 and 343.4 which is significantly higher than the standard L-shape resonator design. The sensor design can be developed with a single fabrication step. Due to the ease of fabrication and the highly responsive nature of the design, it can be used in biomedical applications.

Słowa kluczowe

EN

plasmonic sensor; refractive index sensor; metal-insulator-metal waveguide; L-shaped cavity; finite element method

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2021
• Tom: Vol. 51, nr 1
• Strony: 109--120
• Opis fizyczny: Bibliogr. 33 poz., rys., tab.

Twórcy

autor

Butt M. A.

• Samara National Research University, 443086 Samara, Russia
• Warsaw University of Technology, Institute of Microelectronics and Optoelectronics, Koszykowa 75, 00-662 Warszawa, Poland

autor

Kazanskiy N. L.

• Samara National Research University, 443086 Samara, Russia
• Institute of RAS – Branch of the FSRC “Crystallography and Photonics” RAS, Samara, Russia

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