Related Experiment Video
Updated: May 23, 2026
08:54
Performing Spectroscopy on Plasmonic Nanoparticles with Transmission-Based Nomarski-Type Differential Interference Contrast Microscopy
Published on: June 5, 2019
Chiroptical effects in planar achiral plasmonic oriented nanohole arrays
Ben M Maoz1, Assaf Ben Moshe, Daniel Vestler
1Department of Chemical Physics, School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel.
Nano Letters
|April 5, 2012
Summary
Symmetric nanostructure arrays exhibit strong chiroptical effects when tilted, offering a novel method for chiral sensing and negative refraction applications.
Area of Science:
- Plasmonics and Nanophotonics
- Chiroptical Spectroscopy
Background:
- Chiroptical effects are typically observed in asymmetric 3D objects or chiral thin films.
- Plasmonic nanostructures offer tunable optical properties for advanced applications.
Purpose of the Study:
- To investigate chiroptical responses in symmetric plasmonic nanostructures.
- To explore the potential of extrinsic chiroptical effects for sensing and negative refraction.
Main Methods:
- Fabrication of symmetric planar arrays of circular nanoholes.
- Tilting the nanostructure arrays with respect to incident light beams.
- Analysis of surface plasmon excitations and resulting chiroptical responses at visible wavelengths.
Main Results:
- Symmetric plasmonic arrays of circular nanoholes demonstrated strong chiroptical responses upon tilting.
- The observed extrinsic chiroptical effect originated from collective asymmetric surface plasmon excitations.
- This effect was found to be potentially stronger than intrinsic chiroptical responses.
Conclusions:
- Symmetric plasmonic nanostructures can exhibit significant extrinsic chiroptical effects.
- This phenomenon provides a new avenue for developing chiral sensors.
- Potential applications include negative refraction and advanced optical devices.
