Plasmon resonances on opto-capacitive nanostructures

N. Shahcheraghi; A. Dowd; M. D. Arnold; M. B. Cortie

doi:10.1117/12.2202282

22 December 2015 Plasmon resonances on opto-capacitive nanostructures

N. Shahcheraghi, A. Dowd, M. D. Arnold, M. B. Cortie

Proceedings Volume 9668, Micro+Nano Materials, Devices, and Systems; 96685C (2015) https://doi.org/10.1117/12.2202282
Event: SPIE Micro+Nano Materials, Devices, and Applications, 2015, Sydney, New South Wales, Australia

Abstract

Silver is considered as one of the most desirable materials for plasmonic devices due to it having low loss, low epsilon₂, across the visible spectrum. In addition, silver nanotriangles can self-assemble into complex structures that can include tip-totip or base-to-base arrangements. While the optical properties of tip-to-tip dimers of nanotriangles have been quite intensively studied, the geometric inverse, the base-to-base configuration, has received much less attention. Here we report the results of a computational study of the optical response of this latter configuration. Calculations were performed using the discrete dipole approximation. The effect of gap size and substrate are considered. The results indicate that the base-to-base configuration can sustain a strong coupled dipole and various multimode resonances. The pairing of the parallel triangle edges produces a strongly capacitive configuration and very intense electric fields over an extended volume of space. Therefore, the base-to-base configuration could be suitable for a range of plasmonic applications that require a strong and uniform concentration of electric field. Examples include refractometeric sensing or metal-enhanced fluorescence.

Citation Download Citation

N. Shahcheraghi, A. Dowd, M. D. Arnold, and M. B. Cortie "Plasmon resonances on opto-capacitive nanostructures", Proc. SPIE 9668, Micro+Nano Materials, Devices, and Systems, 96685C (22 December 2015); https://doi.org/10.1117/12.2202282

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