Enhancing throughput over 100 times by a triple-tapered structure for a near-field optical fiber probe

Takashi Yatsui; Motonobu Kourogi; Kazuo Tsutsui; Motoichi Ohtsu

doi:10.1117/12.326807

13 October 1998 Enhancing throughput over 100 times by a triple-tapered structure for a near-field optical fiber probe

Takashi Yatsui, Motonobu Kourogi, Kazuo Tsutsui, Motoichi Ohtsu

Proceedings Volume 3467, Far- and Near-Field Optics: Physics and Information Processing; (1998) https://doi.org/10.1117/12.326807
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

We have successfully fabricated an extremely high throughput probe for near-field optics introducing a triple-tapered structure to reduce the loss in a tapered core, to focus the light, and to excite effectively the HE₁₁ mode. A focused ion beam and selective chemical etching were used for fabrication. Over 100 times increase in the throughput of the triple-tapered probe with the aperture diameter D < 100 nm was realized in comparison with the conventional single-tapered probe. Furthermore, due to the third taper with a small cone angle, the localized optical near-field on the triple-tapered probe with D equals 60 nm has been confirmed.

Citation Download Citation

Takashi Yatsui, Motonobu Kourogi, Kazuo Tsutsui, and Motoichi Ohtsu "Enhancing throughput over 100 times by a triple-tapered structure for a near-field optical fiber probe", Proc. SPIE 3467, Far- and Near-Field Optics: Physics and Information Processing, (13 October 1998); https://doi.org/10.1117/12.326807

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