Spatially switched near field distribution using plasmonic random nanoislands

Gwiyeong Moon; Taehwang Son; Hongki Lee; Donghyun Kim

doi:10.1117/12.2508114

7 March 2019 Spatially switched near field distribution using plasmonic random nanoislands

Gwiyeong Moon, Taehwang Son, Hongki Lee, Donghyun Kim

Proceedings Volume 10894, Plasmonics in Biology and Medicine XVI; 108941H (2019) https://doi.org/10.1117/12.2508114
Event: SPIE BiOS, 2019, San Francisco, California, United States

Abstract

We investigate switching near-field distribution on metal random nanoislands by changing the direction and the angle of light incidence in 14 channel modes. Distribution of the near-fields induced by different channel modes was calculated by finite difference time domain method. The size of near-fields under oblique channel modes ranges 48 - 77 nm in contrast to 127 - 145 nm with normal incidence. Quantitative analysis of near-field position was performed relative to nanoislands. Near-field position was largely well aligned with the direction of incident channel modes. Switching near fields was experimentally confirmed in two ways, first by measurement of fluorescence intensity and by NSOM. Fluorescence experiment was conducted by using bare glass substrate and gold nanoislands in seven channel modes. Fluorescence intensity on bare glass substrate shows symmetric intensity changes with channel modes. However, fluorescence intensity on gold nanoislands was found to be asymmetric. For quantitative analysis, mean-squared error (MSE) was calculated by defining fluorescence intensity as a 7D vector. Distribution of MSE in case of gold nanoislands was broader than on bare glass substrate. In other words, near fields induced on gold nanoislands were switched more strongly than bare glass substrate. Also, near fields induced on nanoislands were measured directly using NSOM in two channel modes. It was confirmed that spatial positions of near-fields depend on channel modes. The results of this study suggest that the near fields can be controlled by adjusting channel modes, which opens possibilities of highly sensitive and super-resolved detection and imaging.

Citation Download Citation

Gwiyeong Moon, Taehwang Son, Hongki Lee, and Donghyun Kim "Spatially switched near field distribution using plasmonic random nanoislands", Proc. SPIE 10894, Plasmonics in Biology and Medicine XVI, 108941H (7 March 2019); https://doi.org/10.1117/12.2508114

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Near field

Gold

Nanostructures

Switching

Plasmonics

Near field scanning optical microscopy

Atomic force microscopy

Show All Keywords

Keywords/Phrases

Search In:

Publication Years