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Surface plasmon coupled nano-probe for near field scanning optical microscopy
Optics Express
|May 15, 2020
Summary
We developed a novel surface plasmon-coupled nano-probe for near-field scanning optical microscopy (NSOM). This hybrid probe combines scattering and collection modes, enhancing signals and reducing noise for nanoscale imaging.
Area of Science:
- Optics and Photonics
- Nanotechnology
- Materials Science
Background:
- Near-field scanning optical microscopy (NSOM) is crucial for nanoscale analysis.
- Existing NSOM probes (scattering-type and aperture-type) have limitations.
- Probe design significantly impacts NSOM performance and data quality.
Purpose of the Study:
- To propose and investigate a novel surface plasmon-coupled nano-probe for NSOM.
- To combine the advantages of scattering-type and aperture-type NSOM probes.
- To enhance signal detection and reduce background noise in NSOM.
Main Methods:
- Designed a nanoparticle-on-film structure on a tapered fiber tip.
- Utilized a hybrid scattering and surface plasmon coupled emission mechanism.
- Analyzed the probe's capability for near-field electric field distribution measurement.
Main Results:
- The proposed probe functions as a hybrid system, integrating scattering and collection modes.
- Demonstrated signal enhancement through surface plasmon coupled emission.
- Showcased significant suppression of background noise compared to conventional probes.
Conclusions:
- The surface plasmon-coupled nano-probe offers a promising solution for advanced NSOM applications.
- This hybrid probe design could overcome limitations of existing NSOM probe types.
- The developed probe has high potential for improving nanoscale imaging resolution and sensitivity.
