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Circular waveguides with Kronig–Penney morphology as photonic band‐gap filters
Author(s) -
Gómez Álvaro,
Solano Miguel A.,
Lakhtakia Akhlesh,
Vegas Angel
Publication year - 2003
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.10906
Subject(s) - microwave , ideal (ethics) , photonic crystal , optics , scattering , physics , band gap , photonics , waveguide , scattering parameters , optoelectronics , materials science , quantum mechanics , philosophy , epistemology
Guided wave propagation in a circular waveguide filled with dielectric materials in the Kronig–Penney morphology is theoretically examined. Allowed and forbidden frequency bands in these ideal photonic band‐gap (PBG) structures are obtained for the TE z and TM z propagation modes by invoking the Bloch theorem. Results show the many engineering possibilities for designing electromagnetic filters for ideal structures. Filtering by real PBG structures with a finite number of unit cells is also studied by using the scattering matrix technique. As the number of unit cells in a real filter increases, its transmission characteristics converge to those of its ideal analog in the forbidden frequency bands. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 37: 316–321, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10906