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Title: Effect of in-material losses on terahertz absorption, transmission, and reflection in photonic crystals made of polar dielectrics

Abstract

The effect of the material absorption factor on terahertz absorption (A), transmittance (T), and reflectance (R) for slabs of PhC that comprise rods made of GaAs, a polar dielectric, is studied. The main goal was to illustrate how critical a choice of the absorption factor for simulations is and to indicate the importance of the possible modification of the absorption ability by using either active or lossy impurities. The spectra of A, T, and R are strongly sensitive to the location of the polaritonic gap with respect to the photonic pass and stop bands connected with periodicity that enables the efficient combination of the effects of material and structural parameters. It will be shown that the spectra can strongly depend on the utilized value of the material absorption factor. In particular, both narrow and wide absorption bands may appear owing to a variation of the material parameters with a frequency in the vicinity of the polaritonic gap. The latter are often achieved at wideband suppression of transmission, so that an ultra-wide stop band can appear as a result of adjustment of the stop bands having different origin. The results obtained at simultaneous variation of the absorption factor and frequency, andmore » angle of incidence and frequency, indicate the possibility of the existence of wide ranges of tolerance, in which the basic features do remain. This allows for mitigating the accuracy requirements for the absorption factor in simulations and promises the efficient absorption of nonmonochromatic waves and beams with a wide angular spectrum. Suppression of narrowband effects in transmission is demonstrated at rather large values of the absorption factor, when they appear due to either the defect modes related to structural defects or dispersion inspired variations of the material parameters in the vicinity of the polaritonic gap. Comparison with auxiliary structures helps one to detect the common features and differences of homogeneous slabs and slabs of a PhC, which are made of GaAs.« less

Authors:
 [1];  [2];  [3]
  1. Yokohama City University, Department of Nanosystem Science, Graduate School of Nanobioscience, Kanazawa Ku, 22-2 Seto, Yokohama, Kanagawa 2360027 (Japan)
  2. TUBITAK Marmara Research Center, Materials Institute, 41470 Gebze, Kocaeli (Turkey)
  3. Nanotechnology Research Center—NANOTAM, Bilkent University, 06800 Ankara (Turkey)
Publication Date:
OSTI Identifier:
22492762
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 118; Journal Issue: 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; ACCURACY; CRYSTALS; DIELECTRIC MATERIALS; GALLIUM ARSENIDES; IMPURITIES; INCIDENCE ANGLE; LOSSES; PERIODICITY; REFLECTION; SIMULATION; SLABS; SPECTRA

Citation Formats

Serebryannikov, Andriy E., E-mail: andser@amu.edu.pl, Nanotechnology Research Center—NANOTAM, Bilkent University, 06800 Ankara, Nojima, S., Alici, K. B., and Ozbay, Ekmel. Effect of in-material losses on terahertz absorption, transmission, and reflection in photonic crystals made of polar dielectrics. United States: N. p., 2015. Web. doi:10.1063/1.4932017.
Serebryannikov, Andriy E., E-mail: andser@amu.edu.pl, Nanotechnology Research Center—NANOTAM, Bilkent University, 06800 Ankara, Nojima, S., Alici, K. B., & Ozbay, Ekmel. Effect of in-material losses on terahertz absorption, transmission, and reflection in photonic crystals made of polar dielectrics. United States. https://doi.org/10.1063/1.4932017
Serebryannikov, Andriy E., E-mail: andser@amu.edu.pl, Nanotechnology Research Center—NANOTAM, Bilkent University, 06800 Ankara, Nojima, S., Alici, K. B., and Ozbay, Ekmel. 2015. "Effect of in-material losses on terahertz absorption, transmission, and reflection in photonic crystals made of polar dielectrics". United States. https://doi.org/10.1063/1.4932017.
@article{osti_22492762,
title = {Effect of in-material losses on terahertz absorption, transmission, and reflection in photonic crystals made of polar dielectrics},
author = {Serebryannikov, Andriy E., E-mail: andser@amu.edu.pl and Nanotechnology Research Center—NANOTAM, Bilkent University, 06800 Ankara and Nojima, S. and Alici, K. B. and Ozbay, Ekmel},
abstractNote = {The effect of the material absorption factor on terahertz absorption (A), transmittance (T), and reflectance (R) for slabs of PhC that comprise rods made of GaAs, a polar dielectric, is studied. The main goal was to illustrate how critical a choice of the absorption factor for simulations is and to indicate the importance of the possible modification of the absorption ability by using either active or lossy impurities. The spectra of A, T, and R are strongly sensitive to the location of the polaritonic gap with respect to the photonic pass and stop bands connected with periodicity that enables the efficient combination of the effects of material and structural parameters. It will be shown that the spectra can strongly depend on the utilized value of the material absorption factor. In particular, both narrow and wide absorption bands may appear owing to a variation of the material parameters with a frequency in the vicinity of the polaritonic gap. The latter are often achieved at wideband suppression of transmission, so that an ultra-wide stop band can appear as a result of adjustment of the stop bands having different origin. The results obtained at simultaneous variation of the absorption factor and frequency, and angle of incidence and frequency, indicate the possibility of the existence of wide ranges of tolerance, in which the basic features do remain. This allows for mitigating the accuracy requirements for the absorption factor in simulations and promises the efficient absorption of nonmonochromatic waves and beams with a wide angular spectrum. Suppression of narrowband effects in transmission is demonstrated at rather large values of the absorption factor, when they appear due to either the defect modes related to structural defects or dispersion inspired variations of the material parameters in the vicinity of the polaritonic gap. Comparison with auxiliary structures helps one to detect the common features and differences of homogeneous slabs and slabs of a PhC, which are made of GaAs.},
doi = {10.1063/1.4932017},
url = {https://www.osti.gov/biblio/22492762}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 13,
volume = 118,
place = {United States},
year = {Wed Oct 07 00:00:00 EDT 2015},
month = {Wed Oct 07 00:00:00 EDT 2015}
}