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- Title
Anomalous Picosecond Optical Transmittance Dynamics in Au-Bi:YIG Hybrid Metasurface.
- Authors
Kiryanov, M. A.; Ostanin, G. S.; Dolgova, T. V.; Inoue, M.; Fedyanin, A. A.
- Abstract
The sub- and picosecond optical response dynamics of the metal–dielectric metasurface based on gold nanospheres placed in a layer of bismuth-substituted yttrium iron garnet has been studied via the pump–probe femtosecond spectroscopy with time resolution. It is shown that the plasmon modes of the metasurface demonstrate bulk gold dynamics, while the observed relaxation of the polariton mode is slowed down by several picoseconds. The difference arise because of the detection of different processes at the wavelengths of the plasmon and polariton modes by the probe beam.
- Subjects
YTTRIUM iron garnet; BISMUTH; GOLD films
- Publication
JETP Letters, 2023, Vol 117, Issue 3, p196
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364022603220