Ultra-high figure-of-merit dielectric metasurface

Keshav Samrat Modi; Jasleen Kaur; Satya Pratap Singh; Umesh Tiwari; Ravindra Kumar Sinha

doi:10.1117/12.2579219

5 March 2021 Ultra-high figure-of-merit dielectric metasurface

Keshav Samrat Modi, Jasleen Kaur, Satya Pratap Singh, Umesh Tiwari, Ravindra Kumar Sinha

Proceedings Volume 11695, High Contrast Metastructures X; 1169508 (2021) https://doi.org/10.1117/12.2579219
Event: SPIE OPTO, 2021, Online Only

Abstract

Metamaterials are the sub-wavelength arrays of the composite structure made of metallic and/or dielectric materials. The metal-dielectric structure provides a significant enhancement in the field but has a high loss, low Q-Factor and poor spectral contrast in the visible and infrared frequencies. To overcome these problems, all-dielectric metamaterials structures are the better alternative which offers negligible losses due to their low absorption and hence they have narrow resonance peak and high spectral contrast. When all-dielectric metamaterial with specific geometry (asymmetric oscillators) interacts with the electromagnetic field in visible and infrared (IR) wavelength range, the interaction produces the Fano-Resonance. The Fano resonance depends on the shape and size of the metasurface structure and the refractive index of the surrounding. The Fano-resonance based on all-dielectric metamaterials can be used as a refractive index sensor for biomedical sensing and optical modulation in telecommunication. All-dielectric metamaterials based on Fano resonance can be utilized to have a high Figure-of-merit (FoM) refractive index sensor device. In this work, we are proposing a Fano resonance-based refractive index (RI) sensor which has a high FoM of the order of 2465.

Conference Presentation

Citation Download Citation

Keshav Samrat Modi, Jasleen Kaur, Satya Pratap Singh, Umesh Tiwari, and Ravindra Kumar Sinha "Ultra-high figure-of-merit dielectric metasurface", Proc. SPIE 11695, High Contrast Metastructures X, 1169508 (5 March 2021); https://doi.org/10.1117/12.2579219

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