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Updated: May 13, 2026
08:01
Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
Optical magnetic field mapping using a subwavelength aperture
Hyun Woo Kihm1, Jineun Kim, Sukmo Koo
1Center for Subwavelength Optics and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
Optics Express
|March 14, 2013
Summary
Characterizing nanoscale optical magnetic fields is challenging. This study visualizes optical magnetic field profiles using metallic apertures, enabling new material development.
Area of Science:
- Optics and Photonics
- Materials Science
- Nanotechnology
Background:
- Local optical magnetic field distribution is crucial for engineered optical materials.
- Characterizing nanoscale optical magnetic fields is difficult due to weak interactions.
Purpose of the Study:
- To experimentally visualize optical magnetic field profiles at the nanoscale.
- To demonstrate a method for characterizing optical magnetic fields using metallic apertures.
Main Methods:
- Raster scanning circular apertures in metal film.
- Utilizing a conical probe for optical magnetic field visualization.
- Measuring transmission through metallic apertures.
Main Results:
- Successfully visualized optical magnetic field profiles of surface plasmon polaritons and radially polarized beams.
- Experimental results showed excellent agreement with theoretical predictions.
- Demonstrated that Bethe-Bouwkamp apertures are effective for optical magnetic field visualization.
Conclusions:
- The developed method enables experimental visualization of optical magnetic field profiles.
- Bethe-Bouwkamp apertures are a viable tool for nanoscale optical magnetic field characterization.
- This technique can advance the development of materials with engineered optical properties.
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