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Updated: Feb 24, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
Formation of Degenerate Band Gaps in Layered Systems
Anton I Ignatov1, Alexander M Merzlikin2, Miguel Levy3
1Institute for Theoretical and Applied Electromagnetics, Russian Academy of Sciences, Izhorskaya Street 13, Moscow 125412, Russia. ignatovtoha@gmail.com.
Abstract:
In the review, peculiarities of spectra of one-dimensional photonic crystals made of anisotropic and/or magnetooptic materials are considered. The attention is focused on band gaps of a special type-the so called degenerate band gaps which are degenerate with respect to polarization. Mechanisms of formation and properties of these band gaps are analyzed. Peculiarities of spectra of photonic crystals that arise due to the linkage between band gaps are discussed. Particularly, it is shown that formation of a frozen mode is caused by linkage between Brillouin and degenerate band gaps. Also, existence of the optical Borrmann effect at the boundaries of degenerate band gaps and optical Tamm states at the frequencies of degenerate band gaps are analyzed.
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