Surface Tamm states in a photonic crystal slab with asymmetric termination |
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| Authors: | Galina V. Li Ekaterina V. Astrova Sergey A. Dyakov Anna Baldycheva Tatiana S. Perova Sergey G. Tikhodeev Nikolay A. Gippius |
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| Affiliation: | 1. Ioffe Physical Technical Institute, RAS, Polytekhnicheskaya 26, 194021 St. Petersburg, Russia;2. Ioffe Physical Technical Institute, RAS, Polytekhnicheskaya 26, 194021 St. Petersburg, RussiaPhone: +78 122 927 957, Fax: +78 122 927 123;3. Department of Electronic and Electrical Engineering, Trinity College Dublin, Dublin 2, Ireland;4. A. M. Prokhorov General Physics Institute, RAS, Vavilova 38, 119991 Moscow, Russia |
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| Abstract: | 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) |
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| Keywords: | macroporous silicon electrochemical etching photonic crystals surface Tamm states |
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