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Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

A periodically coupled plasmon nanostructure for refractive index sensing.

Jayson L Briscoe¹, Sang-Yeon Cho

¹Klipsch School of Electrical and Computer Engineering, New Mexico State University, Las Cruces, New Mexico 88003-8001, USA. briscojl@nmsu.edu

|June 7, 2011

Summary

We demonstrate subwavelength surface plasmon polaritons in a novel nanowell structure, achieving high-quality surface plasmon resonance for advanced optical sensing applications with exceptional sensitivity.

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Area of Science:

Photonics and Nanotechnology
Optical Sensing
Plasmonics

Background:

Subwavelength surface plasmon polaritons (SPPs) are crucial for nanoscale light manipulation.
Periodic nanostructures offer unique optical properties for enhanced light-matter interactions.
High-quality resonance is essential for sensitive optical sensing.

Purpose of the Study:

To investigate the unique characteristics of SPPs in a periodically coupled nanowell structure.
To evaluate the potential of this structure for high-performance optical sensing applications.
To determine the sensitivity of the nanowell structure to changes in its surface environment.

Main Methods:

Numerical calculations of optical transmission and resonance characteristics.

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Published on: January 3, 2016

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Analysis of subwavelength surface plasmon polariton behavior within the nanowell structure.

Characterization of the structure's sensitivity using refractive index (RI) changes.

Main Results:

The nanowell structure exhibits high-quality internal surface plasmon resonance.
A narrow Full Width at Half Maximum (FWHM) of 6 nm for the transmission peak was calculated.
Near-perfect optical transmission (~100%) was achieved at a resonant wavelength of 815.8 nm.
The structure demonstrated a high sensitivity of 4800% RIU⁻¹ due to concentrated polaritons.

Conclusions:

The periodically coupled nanowell structure is a promising platform for subwavelength SPPs.
The demonstrated high-quality resonance and sensitivity make it suitable for advanced optical sensing.
This nanostructure offers a significant advancement in the field of plasmonic sensing technology.