Fundamental limits to large-area plasmonic field enhancements

Zhaowei Dai; Owen D. Miller

doi:10.1117/12.2677539

5 October 2023 Fundamental limits to large-area plasmonic field enhancements

Zhaowei Dai, Owen D. Miller

Proceedings Volume PC12648, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI; PC126481C (2023) https://doi.org/10.1117/12.2677539
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

For applications from optical sensing to photoemission spectroscopy, it is desirable to pattern a plasmonic surface and enhance, over a large area, the field intensity near the surface. What is the largest possible large-area field enhancement? Here, we show a simple semi-analytical bound, based primarily on power-conservation principles, that dictates the fundamental limits to large-area plasmonic field enhancements. Our bounds depend only on the material permittivity and the angle of incidence. Our theory predicts that > 1000X field enhancements are possible with patterned silver metasurfaces. Through numerical optimization, we discover structures that achieve enhancements over 97% of the fundamental limit, for designable wavelengths across the visible and near-infrared.

Conference Presentation

Citation Download Citation

Zhaowei Dai and Owen D. Miller "Fundamental limits to large-area plasmonic field enhancements", Proc. SPIE PC12648, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI, PC126481C (5 October 2023); https://doi.org/10.1117/12.2677539

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