Related Experiment Video
Updated: Jul 13, 2026
09:00
Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
Published on: December 11, 2013
Grating-coupling of surface plasmons onto metallic tips: a nanoconfined light source
C Ropers1, C C Neacsu, T Elsaesser
1Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, D-12489 Berlin, Germany. ropers@mbi-berlin.de
Nano Letters
|August 10, 2007
Summary
We developed a novel nanometer-scale light source using surface plasmon polaritons (SPPs) on a conical metal taper. This technology enables intense light spots for advanced nanospectroscopy applications.
Area of Science:
- Optics and Photonics
- Nanotechnology
- Materials Science
Background:
- Conventional light sources face limitations in spatial resolution and intensity for nanoscale applications.
- Surface plasmon polaritons (SPPs) offer a route to confine light at the nanoscale.
Purpose of the Study:
- To demonstrate a new nanometer-scale broadband light source.
- To enable enhanced performance in nanospectroscopy and apertureless microscopy.
Main Methods:
- Fabrication of sharp conical metal tapers with tip radii of few tens of nanometers.
- Grating-coupled excitation of surface plasmon polaritons (SPPs) on the taper shaft.
- Resonant generation and propagation of SPPs to the taper apex.
Main Results:
- Generation of intense, localized light spots at the tip apex.
- SPPs traveled over 10 micrometers to the tip.
- Demonstration of a functional nanometer-scale broadband light source.
Conclusions:
- The developed nanofabricated tips are effective broadband light sources.
- This technology can overcome background illumination issues in apertureless microscopy.
- Potential for diverse applications in nanospectroscopy and nanoscale imaging.
