Major reshaping of narrow beams by resonant multilayer structures

Yurchenko V. B., Ciydem M., Gradziel M. L., Murphy J. A.

OPTICS EXPRESS, cilt.28, sa.6, ss.8211-8222, 2020 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 28 Sayı: 6
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1364/oe.386610
  • Dergi Adı: OPTICS EXPRESS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, EMBASE, MEDLINE, Directory of Open Access Journals
  • Sayfa Sayıları: ss.8211-8222
  • Gazi Üniversitesi Adresli: Hayır

Özet

Major reshaping of electromagnetic MM-wave beams transmitted at resonant frequencies through high-quality multilayer structures is demonstrated. Beam reshaping emerges due to efficient excitation of intrinsic quasi-optical modes with complex spatial profiles by an incident beam. This leads to a significant increase of width and distortion of shape of transmitted beams, which grow with increasing likelihood of excitation of higher-order modes. The beam shape is extremely sensitive to imperfections of real structures and can become complex and asymmetric even at the normal-angle transmission of symmetric incident beams. The effect is of importance for the resonant MM-wave and THz spectroscopy of low-loss dielectric materials. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement