Optical properties of opaline photonic crystals covered by phase-change material Ge\(_2\)Sb\(_2\)Te\(_5\)

The physical origin of resonant Wood's anomalies in the reflection spectra of three-dimensional (3D) opaline photonic crystals covered with Ge\(_2\)Sb\(_2\)Te\(_5\) (GST225) is discussed. For this purpose, the optical reflection spectra are studied for different incident angles of light both ex...

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Bibliographic Details
Published in:arXiv.org 2017-06
Main Authors: Dyakov, Sergey A, Gippius, Nikolay A, Voronov, Mikhail M, Yakovlev, Sergey A, Pevtsov, Alexander B, Akimov, Ilya A, Tikhodeev, Sergei G
Format: Article
Language:English
Subjects:
Angle of reflection
Anomalies
Antimony
Incident light
Optical properties
Optical reflection
Phase change materials
Photonic crystals
Resonant frequencies
Spectra
Tellurium
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Summary:The physical origin of resonant Wood's anomalies in the reflection spectra of three-dimensional (3D) opaline photonic crystals covered with Ge\(_2\)Sb\(_2\)Te\(_5\) (GST225) is discussed. For this purpose, the optical reflection spectra are studied for different incident angles of light both experimentally and theoretically. The performed eigenmode analysis reveals that the Wood's anomalies originate from the quasiguided modes which appear in the GST225 capping layer. This conclusion is supported by the simulated electromagnetic near-field distributions of incident light at resonant frequencies. The experimental reflection spectra are in a good agreement with theoretical calculations performed by the Fourier modal method in the scattering matrix form.
ISSN:2331-8422
DOI:10.48550/arxiv.1611.09789