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

Kazuhiro Yamamoto; Shiyoshi Yokoyama; Akira Otomo

doi:10.1117/12.2001735

21 February 2013 On-chip superfocusing of surface plasmon using metal-coat tapered optical fiber pairs with nano-gap structures

Kazuhiro Yamamoto, Shiyoshi Yokoyama, Akira Otomo

Author Affiliations +

Proceedings Volume 8632, Photonic and Phononic Properties of Engineered Nanostructures III; 863228 (2013) https://doi.org/10.1117/12.2001735
Event: SPIE OPTO, 2013, San Francisco, California, United States

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.

Citation Download Citation

Kazuhiro Yamamoto, Shiyoshi Yokoyama, and Akira Otomo "On-chip superfocusing of surface plasmon using metal-coat tapered optical fiber pairs with nano-gap structures", Proc. SPIE 8632, Photonic and Phononic Properties of Engineered Nanostructures III, 863228 (21 February 2013); https://doi.org/10.1117/12.2001735

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