Two-dimensional photonic-crystal-slab channel-drop filter with flat-top response | Zendy

Yoshihiro Akahane | Zendy; Takashi Asano | Zendy; Hitomichi Takano | Zendy; Bong-Shik Song | Zendy; Yoshinori Takana | Zendy; Susumu Noda | Zendy

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Two-dimensional photonic-crystal-slab channel-drop filter with flat-top response

Author(s) -

Yoshihiro Akahane,

Takashi Asano,

Hitomichi Takano,

Bong-Shik Song,

Yoshinori Takana,

Susumu Noda

Publication year - 2005

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/opex.13.002512

Subject(s) - photonic crystal , optics , materials science , drop (telecommunication) , slab , finite difference time domain method , bandwidth (computing) , optical filter , coupled mode theory , filter (signal processing) , wavelength division multiplexing , wavelength , refractive index , physics , telecommunications , geophysics , computer science , computer vision

We report a theoretical and experimental study of a channel drop filter with two cascaded point-defects between two line-defects in a two-dimensional photonic-crystal slab. Using coupled-mode analysis and a three-dimensional finite-difference time-domain method, we design a filter to engineer the line shape of the drop spectrum. A flat-top and sharp roll-off response is theoretically and experimentally achieved by the designed and fabricated filters. Furthermore, we theoretically demonstrate that drop efficiency is increased dramatically, up to 93%, by introducing hetero-photonic-crystals. We also describe a method to modify the bandwidth of the spectrum.

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