Ultra-sensitive gas sensor using Fano resonance in hybrid nano-bar/nano-elliptic dielectric metasurface

Norhan A. Salama; Salah S. A. Obayya; Shaimaa M. Alexeree; Mohamed A. Swillam

doi:10.1117/12.2670170

6 June 2023 Ultra-sensitive gas sensor using Fano resonance in hybrid nano-bar/nano-elliptic dielectric metasurface

Norhan A. Salama, Salah S. A. Obayya, Shaimaa M. Alexeree, Mohamed A. Swillam

Proceedings Volume 12568, Metamaterials XIV; 1256819 (2023) https://doi.org/10.1117/12.2670170
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Conference Poster

Abstract

Fano resonance is an intriguing physical phenomenon that could be achieved by engineering a destructive interference between a superradiant bright mode and a subradiant dark mode. A variety of hybrid systems of metasurfaces have been widely explored demonstrating sharp Fano resonances with high sensitivity. However, plasmonic metasurfaces have limitations of Ohmic losses that constrain the achievable quality factor. Meanwhile, the dielectric metasurfaces provide sharp Fano resonance but with limited sensitivity and figure-of-merit (FOM) compared to plasmonic metasurfaces. In this paper, we report an ultra-sharp, ultra-sensitive refractormetric gas sensor based on Fano resonance using all dielectric metasurface. Our proposed design is composed of hybrid system of nano-bar/nano-elliptic all dielectric silicon. The proposed design has reported a sensitivity of 1,852 nm/RIU with a significant quality factor of 1225, leading to a figure-of-merit (FOM) of 411 at the operating wavelength of 5.5128 μm, within the spectral window of the nitric oxide. Our design brings a considerable impact as a cheap and easily fabricated sensor for gas chemical recognition.

Citation Download Citation

Norhan A. Salama, Salah S. A. Obayya, Shaimaa M. Alexeree, and Mohamed A. Swillam "Ultra-sensitive gas sensor using Fano resonance in hybrid nano-bar/nano-elliptic dielectric metasurface", Proc. SPIE 12568, Metamaterials XIV, 1256819 (6 June 2023); https://doi.org/10.1117/12.2670170

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available