A Compact Double Phase-Shifted Photonic Crystal Filter

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2015 by IJETT Journal
Volume-19 Number-5
Year of Publication : 2015
Authors : Divya Singh, Niraj Kumar, Prashant Singodiya, Bhawana Singh


Divya Singh, Niraj Kumar, Prashant Singodiya, Bhawana Singh "A Compact Double Phase-Shifted Photonic Crystal Filter", International Journal of Engineering Trends and Technology (IJETT), V19(5), 240-243 Jan 2015. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group


This document present a simple 2D filter structure build up of a narrow ridge waveguide with high lateral index contrast and equipped with a 2D photonic crystal consisting of a single row of air holes. The structure is investigated using finite difference time domain method. The classical high-Q transmission filter design is considered with a double phase-shifted photonic crystal waveguide grating. In order to improve the filter characteristic of a phase-shifted grating filter multiple phase-shift sections can be used. The phase-shift region is introduced by the insertion of an unmodulated waveguide region which is 0.5a long. This phase-shift is placed in the center of the photonic crystal waveguide grating. Three cases with the outer waveguide grating lengths of 8a, 9a, and 10a are used.


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photonic crystal; filters; phase sift region; microcavity; finite difference time domain; resonance; waveguide