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@ARTICLE{Korotyeyev:865352,
      author       = {Korotyeyev, V. V. and Lyashuk, M. and Kochelap, V. and
                      Varani, L. and Coqcuillat, D. and Danylyuk, S. and Brose, S.
                      and Vitusevich, Svetlana},
      title        = {{I}nteraction of sub-terahertz radiation with low-doped
                      grating-based {A}l{G}a{N}/{G}a{N} plasmonic structures.
                      {T}ime-domain spectroscopy measurements and electrodynamic
                      modeling},
      journal      = {Semiconductor physics, quantum electronics $\&$
                      optoelectronics},
      volume       = {22},
      number       = {2},
      issn         = {1605-6582},
      address      = {Kyiv},
      publisher    = {Inst. of Semiconductor Physics},
      reportid     = {FZJ-2019-04850},
      pages        = {237 - 251},
      year         = {2019},
      abstract     = {We have presented the results of terahertz time-domain
                      spectroscopy measurements and a rigorous electrodynamic
                      modeling of the optical characteristics of grating-based
                      AlGaN/GaN plasmonic structures with low-doped
                      two-dimensional electron gas in the frequency range of
                      0.1...1.5 THz. Two samples with grating aspect ratios (strip
                      width/period) of 2.4/3 and 1.2/1.5 μm have been
                      investigated. The measured transmission spectra are
                      reconstructed in the calculations with high accuracy. The
                      transmission spectra for p-polarized incident radiation
                      exhibits Fabri–Pérot oscillation behavior due to the
                      optically-thick substrate. The specific values of amplitude
                      and spectral position of the transmission maxima are
                      associated with the coupling of terahertz radiation with 2D
                      electron gas due to plasmon excitations. Both calculations
                      and transmission/reflection measurements demonstrate that
                      plasmonic structures with micro-scaled metallic grating have
                      three-fold increase of non-resonant absorption of terahertz
                      radiation in comparison with the bare heterostructure. The
                      polarization measurements of the transmission spectra of the
                      plasmonic structures well agree with calculations and
                      indicate a well-pronounced filtering effect of the grating
                      for the s-component of the incident electromagnetic wave.
                      The obtained values of the transmission for p- and
                      s-polarized incident radiation demonstrate the high quality
                      of deposited metallic grating with the extinction ratio
                      higher than 80:1 for sub- and few THz frequency range.},
      cin          = {ICS-8},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ICS-8-20110106},
      pnm          = {523 - Controlling Configuration-Based Phenomena (POF3-523)},
      pid          = {G:(DE-HGF)POF3-523},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000485818200011},
      doi          = {10.15407/spqeo22.02.237},
      url          = {https://juser.fz-juelich.de/record/865352},
}