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Silicon-Based All-Dielectric Metasurface on an Iron Garnet Film for Efficient Magneto-Optical Light Modulation in
Denis M Krichevsky1,2,3, Shuang Xia4,5, Mikhail P Mandrik6
1Moscow Institute of Physics and Technology (MIPT), 141700 Dolgoprudny, Russia.
Nanomaterials (Basel, Switzerland)
|November 27, 2021
Summary
We enhanced the transverse magneto-optical Kerr effect using silicon nanodisks on a magnetic garnet film. This all-dielectric metasurface shows potential for advanced optical devices like modulators and sensors.
Area of Science:
- Photonics and Nanotechnology
- Magneto-optics
- Materials Science
Background:
- All-dielectric nanostructures enable enhanced light-matter interactions through optical modes.
- Magneto-optical effects are crucial for optical device applications.
Purpose of the Study:
- To enhance the transverse magneto-optical Kerr effect in an all-dielectric metasurface.
- To investigate the performance of silicon nanodisks on a magnetic garnet thin film.
Main Methods:
- Fabrication of a two-dimensional array of silicon nanodisks on a cerium substituted dysprosium iron garnet thin film.
- Excitation of transverse magnetic (TM) modes to observe the magneto-optical effect.
- Analysis of light intensity modulation and its dependence on light incidence plane rotation.
Main Results:
- Observed up to 15% light intensity modulation.
- The magneto-optical effect was nearly independent of the light incidence plane rotation.
- Demonstrated enhancement of the transverse magneto-optical Kerr effect.
Conclusions:
- The developed all-dielectric metasurface effectively enhances the transverse magneto-optical Kerr effect.
- The structure's compatibility with semiconductor technology offers potential for device applications.
- Promising applications include light modulators, magnetic sensors, and chemical sensors.
