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Performing Spectroscopy on Plasmonic Nanoparticles with Transmission-Based Nomarski-Type Differential Interference Contrast Microscopy

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On-chip plasmonic spectrometer.

Yuval Tsur, Ady Arie

|July 30, 2016

Summary

This summary is machine-generated.

We developed a compact on-chip optical spectrometer using surface plasmon polaritons. This device offers tunable spectral windows and has potential applications in Raman spectroscopy and analyzing tiny samples.

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Area of Science:

Optics and Photonics
Nanotechnology
Spectroscopy

Background:

On-chip optical spectrometers are crucial for miniaturized sensing and analysis.
Surface plasmon polaritons (SPPs) offer unique light-matter interaction properties for nanoscale devices.
Existing spectrometers often face limitations in size, tunability, or spectral resolution.

Purpose of the Study:

To design, fabricate, and characterize a novel on-chip optical spectrometer.
To utilize propagating surface plasmon polaritons for spectral analysis in the telecom range.
To explore potential applications in spectroscopy and nanoscale sample analysis.

Main Methods:

Numerical and experimental investigation of an on-chip device.
Utilizing propagating surface plasmon polaritons (SPPs) for light manipulation.
Employing two holographic gratings for coupling and decoupling free-space radiation with SPPs.
Fabrication using standard lithography technology.

Main Results:

A compact spectrometer (800 μm × 100 μm) was realized.
The device resolves 17 spectral channels with 3.1 nm separation.
A freely tunable spectral window was achieved.
Demonstrated feasibility using standard lithography.

Conclusions:

The developed on-chip spectrometer offers high spectral resolution in a compact footprint.
Potential applications include intrinsic filtering for Raman spectroscopy and sensitive analysis of micro/nanoscale samples.
The device leverages plasmonic field enhancement for advanced spectroscopic capabilities.