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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 5 — May. 5, 2009

Nanoscale optical field localization by resonantly focused plasmons

Liang Feng, Derek Van Orden, Maxim Abashin, Qian-Jin Wang, Yan-Feng Chen, Vitaliy Lomakin, and Yeshaiahu Fainman  »View Author Affiliations

Optics Express, Vol. 17, Issue 6, pp. 4824-4832 (2009)

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We experimentally demonstrate use of plasmonic resonant phenomena combined with strong field localization to enhance efficiency of confining optical fields in a Si waveguide. Our approach utilizes a plasmonic resonant nano-focusing-antenna (RNFA), that simultaneously supports several focusing mechanisms in a single nanostructure, integrated with a lossless Si waveguide utilized with silicon-on-insulator (SOI) technology, to achieve a sub-diffraction limited focusing with a nanoscale (deeply subwavelength) spot size. The metallic RNFA effectively converts an incoming propagating waveguide mode to a localized resonant plasmon mode in an ultrasmall volume in all 3 dimensions. The near-field optical measurements of the fabricated RNFA using heterodyne near-field scanning optical microscope (H-NSOM) validate the theoretical predictions showing strong optical field localization.

© 2009 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(240.6680) Optics at surfaces : Surface plasmons
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

Original Manuscript: February 3, 2009
Revised Manuscript: March 3, 2009
Manuscript Accepted: March 9, 2009
Published: March 11, 2009

Virtual Issues
Vol. 4, Iss. 5 Virtual Journal for Biomedical Optics

Liang Feng, Derek Van Orden, Maxim Abashin, Qian-Jin Wang, Yan-Feng Chen, Vitaliy Lomakin, and Yeshaiahu Fainman, "Nanoscale optical field localization by resonantly focused plasmons," Opt. Express 17, 4824-4832 (2009)

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