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Surface Tamm states in a photonic crystal slab with asymmetric termination
Author(s) -
Li Galina V.,
Astrova Ekaterina V.,
Dyakov Sergey A.,
Baldycheva Anna,
Perova Tatiana S.,
Tikhodeev Sergey G.,
Gippius Nikolay A.
Publication year - 2013
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201307151
Subject(s) - photonic crystal , materials science , slab , spectral line , silicon , reflection (computer programming) , scattering , reciprocity (cultural anthropology) , optics , homogeneous , condensed matter physics , lattice (music) , molecular physics , optoelectronics , physics , psychology , social psychology , astronomy , geophysics , computer science , acoustics , thermodynamics , programming language
The reflection and transmission spectra of a finite thickness 2D photonic crystal slab (PCS) based on macroporous silicon are investigated. Periodic photonic crystal region is separated from air by homogeneous silicon interfacial layers. These interfacial layers at the silicon/air boundary being defects of the photonic crystal lattice, define the properties of surface Tamm states in the photonic stop‐bands (PSBs). It is demonstrated experimentally and theoretically that the reflection spectra of a structure with different thicknesses of the interfacial layers on both sides of the PCS depend on the illuminated side. At the same time, the transmission spectra are identical for both light directions in agreement with the reciprocity principle. Analysis shows that the dependence of the reflection spectrum on the side of light entrance is due to scattering losses in the real structure. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)