Nanometric Plasmonic Rulers Based on Orthogonal Plasmonic Gap Modes in Metal Nanoblocks
- Authors
- Lee, Tae-Woo; Lee, Young Jin; Shin, Eunso; Kwon, Soon-Hong
- Issue Date
- Mar-2018
- Publisher
- MDPI
- Keywords
- surface plasmon; plasmon ruler; sensor; nanoparticles
- Citation
- APPLIED SCIENCES-BASEL, v.8, no.3
- Journal Title
- APPLIED SCIENCES-BASEL
- Volume
- 8
- Number
- 3
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/1169
- DOI
- 10.3390/app8030386
- ISSN
- 2076-3417
- Abstract
- We theoretically propose a three-dimensional (3D) plasmonic ruler based on orthogonal plasmonic gap modes which have different wavelengths. The ruler consists of three silver nanoblocks with two ten-nanometer air gaps. First, in a two-block structure, the lateral displacement of one block can be determined by the absorption spectrum, in which two orthogonal modes are observed with different wavelengths. Secondly, in a three-block structure, due to the distinctive wavelength dependencies on the x- or y-directional movement of the two orthogonal modes and the strong dependencies on the air gap size, the 3D positioning of one nanoblock relative to a reference nanoblock can be measured with a 2.5 nm resolution using the spectral positions of the absorption spectrum.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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