naa a22 4500 510817424 CHVBK 20180411083514.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11468-012-9388-7 doi (NATIONALLICENCE)springer-10.1007/s11468-012-9388-7 Double-Layered Metal Nano-Strip Antennas for Sensing Applications [Elektronische Daten] [Zhiwen Kang, Haixi Zhang, Haifei Lu, Ho-Pui Ho] A coupled plasmonic system based on double-layered metal nano-strips for sensing applications is investigated by means of mode analysis and two-dimensional finite-difference time-domain simulations. The nano-strips act as optical antennas through constructive interference of short-range surface plasmon polaritons, thus increasing their scattering cross-section and optical field enhancement. Near-field modulation by optical trapped metal nanoparticles (NPs) is also demonstrated. Our results reveal that the device exhibits a refractive index sensitivity of ∼200nm/RIU, and a maximum surface-enhanced Raman scattering (SERS) factor of 109-1010 from metal NPs trapped in the near-field region. The proposed device shows reasonable figure-of-merit and is ready for integration with common optofluidic biosensors. Springer Science+Business Media, LLC, 2012 Metal nano-strips nationallicence Refractive index sensitivity nationallicence SERS nationallicence Optical trapping nationallicence Kang Zhiwen Centre for Advanced Research in Photonics, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China aut Zhang Haixi Centre for Advanced Research in Photonics, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China aut Lu Haifei Centre for Advanced Research in Photonics, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China aut Ho Ho-Pui Centre for Advanced Research in Photonics, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China aut Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 289-294 1557-1955 8:2<289 2013 8 11468 https://doi.org/10.1007/s11468-012-9388-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11468-012-9388-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kang Zhiwen Centre for Advanced Research in Photonics, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China aut NATIONALLICENCE 700 1- Zhang Haixi Centre for Advanced Research in Photonics, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China aut NATIONALLICENCE 700 1- Lu Haifei Centre for Advanced Research in Photonics, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China aut NATIONALLICENCE 700 1- Ho Ho-Pui Centre for Advanced Research in Photonics, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China aut NATIONALLICENCE 773 0- Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 289-294 1557-1955 8:2<289 2013 8 11468 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer