Related Experiment Video
Updated: Jun 4, 2026
09:00
Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
Published on: December 11, 2013
Anomalous light transmission from plasmonic-capped nanoapertures
Kohei Imura1, Kosei Ueno, Hiroaki Misawa
1Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University , Okubo, Shinjuku, Tokyo 169-8555, Japan.
Nano Letters
|February 2, 2011
Summary
We observed enhanced light transmission through a nanoaperture when covered by a nanodisk near plasmon resonance. This anomalous phenomenon defies conventional optics, even with a larger disk.
Area of Science:
- Optics and Photonics
- Nanotechnology
- Plasmonics
Background:
- Conventional optical principles dictate that covering an aperture should reduce light transmission.
- Understanding light-matter interactions at the nanoscale is crucial for developing advanced optical devices.
Purpose of the Study:
- To investigate an anomalous light transmission phenomenon through a nanoaperture covered by a nanodisk.
- To explore the influence of plasmon resonance on light transmission at the nanoscale.
Main Methods:
- Experimental setup involving a nanoaperture on an opaque screen.
- Utilizing an opaque cap (nanodisk) to cover the nanoaperture.
- Optical characterization near the plasmon resonance wavelength.
Main Results:
- Observed enhanced light transmission through the nanoaperture when covered by a nanodisk.
- The enhancement occurred at wavelengths near the plasmon resonance of the nanodisk.
- The effect persisted even when the nanodisk was larger than the nanoaperture.
Conclusions:
- Demonstrated an anomalous light transmission effect defying conventional optical expectations.
- Highlighted the significant role of plasmon resonance in nanoscale light manipulation.
- Opened new avenues for designing optical components with tunable transmission properties.
