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Fabrication and Operation of a Nano-Optical Conveyor Belt

Fabrication and Operation of a Nano-Optical Conveyor Belt

Published on: August 26, 2015

Nanoscale optical field localization by resonantly focused plasmons.

Liang Feng¹, Derek Van Orden, Maxim Abashin

¹Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, CA 92093, USA. lifeng@ucsd.edu

|March 19, 2009

Summary

We demonstrate plasmonic resonant nano-focusing-antennas (RNFA) for enhanced optical field confinement in silicon waveguides. This technology achieves sub-diffraction limited focusing, enabling nanoscale optical field manipulation.

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Area of Science:

Photonics
Plasmonics
Nanotechnology

Background:

Efficient optical field confinement is crucial for advanced photonic devices.
Silicon-on-insulator (SOI) technology offers a robust platform for integrated photonics.

Purpose of the Study:

To enhance optical field confinement in silicon waveguides using plasmonic resonant phenomena.
To achieve sub-diffraction limited focusing with a nanoscale spot size.

Main Methods:

Integration of a plasmonic resonant nano-focusing-antenna (RNFA) with a silicon-on-insulator (SOI) waveguide.
Utilizing multiple focusing mechanisms within a single nanostructure.
Near-field optical measurements using a heterodyne near-field scanning optical microscope (H-NSOM).

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Main Results:

Demonstration of strong optical field localization in all 3 dimensions.
Achieved deeply subwavelength spot size, surpassing diffraction limits.
Experimental validation of theoretical predictions for optical field confinement.

Conclusions:

Plasmonic resonant nano-focusing-antennas effectively enhance optical field confinement in Si waveguides.
The integrated RNFA-SOI platform enables nanoscale optical field manipulation.
This approach holds potential for next-generation photonic integrated circuits.