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Proceedings Paper

On-chip superfocusing of surface plasmon using metal-coat tapered optical fiber pairs with nano-gap structures
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Paper Abstract

Surface plasmons are coupling waves of electron and electromagnetic field at interfaces of metal and dielectrics or metallic nanostructures and localize at the boundary with nanoscale distribution. So, by using surface plasmons, one can construct integrated optical systems to overcome the diffraction limit of light. Recently, a special electromagnetic mode, called “superfocusing modes”, is important in this research area, owing to high field concentration effect due to increasing of wavenumber of surface plasmons. Metal-coat tapered optical fibers are commonly used for the probes of near-field microscopy and are suitable for fabrication of these superfocusing devices. Furthermore, when these probes are arranged face to face with nano-scale gap, the electric fields in nano-gap also can be enhanced. In this presentation, we show the fabrication processes and numerical analysis of these metal cone structures consist of tapered optical fiber pairs on chip.

Paper Details

Date Published: 21 February 2013
PDF: 8 pages
Proc. SPIE 8632, Photonic and Phononic Properties of Engineered Nanostructures III, 863228 (21 February 2013); doi: 10.1117/12.2001735
Show Author Affiliations
Kazuhiro Yamamoto, Kyushu Univ. (Japan)
Shiyoshi Yokoyama, Kyushu Univ. (Japan)
Akira Otomo, National Institute of Information and Communications Technology (Japan)


Published in SPIE Proceedings Vol. 8632:
Photonic and Phononic Properties of Engineered Nanostructures III
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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