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Proceedings Paper

Template-guided self-assembly strategies for discrete and extended optoplasmonic materials
Author(s): Yan Hong; Wonmi Ahn; Xin Zhao; Björn M. Reinhard
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Paper Abstract

Optoplasmonic materials that contain both metallic (plasmonic) and dielectric building blocks can sustain synergistic electromagnetic interactions between photonic and plasmonic resonances and, thus, pave the way to overcoming the limitations of the respective building blocks. A significant challenge in realizing the full potential of these unique electromagnetic materials is the integration of building blocks with different chemical compositions and sizes into defined morphologies. We demonstrate in this paper that template guided self-assembly strategies show great promise in realizing intricate discrete and extended optoplasmonic materials. Selected examples of optoplasmonic materials and the underlying fabrication methods are discussed. The first example combines dielectric microspheres as whispering gallery mode resonators with plasmonic antennas. The latter are located at defined locations in close vicinity of (but not attached to) the dielectric microsphere. The interactions of WGMs with plasmonic resonators located in their evanescent field are analyzed. The second example describes two-dimensional interdigitated arrays of 250 nm diameter TiO2 NPs and clusters of electromagnetically strongly coupled 60 nm gold nanoparticles. It is demonstrated that delocalized photonic– plasmonic modes in the arrays achieve a cascaded E-field enhancement in the gap junctions of the gold NP clusters.

Paper Details

Date Published: 13 March 2015
PDF: 8 pages
Proc. SPIE 9374, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics VIII, 93740Q (13 March 2015); doi: 10.1117/12.2076065
Show Author Affiliations
Yan Hong, Boston Univ. (United States)
Wonmi Ahn, Boston Univ. (United States)
Xin Zhao, Boston Univ. (United States)
Björn M. Reinhard, Boston Univ. (United States)

Published in SPIE Proceedings Vol. 9374:
Advanced Fabrication Technologies for Micro/Nano Optics and Photonics VIII
Georg von Freymann; Winston V. Schoenfeld; Raymond C. Rumpf; Henry Helvajian, Editor(s)

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