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Title: Enhanced cavity-waveguide interaction in three-dimensional photonic crystals
Authors: Hayran, Zeki
Turduev, Mirbek
Gailevicius, Darius
Mizeikis, Vygantas
Juodkazis, Saulius
Malinauskas, Mangirdas
Kurt, Hamza
Keywords: slow light
photonic crystal
wavelength filtering devices
light trapping
photonic integrated circuits
Issue Date: 2017
Publisher: Spie-Int Soc Optical Engineering
Source: Conference on Photonic and Phononic Properties of Engineered Nanostructures VII -- JAN 30-FEB 02, 2017 -- San Francisco, CA
Series/Report no.: Proceedings of SPIE
Abstract: In this study, we propose a drop-out mechanism based on the enhanced interaction between a defect waveguide and defect microcavities in three-dimensional chirped woodpile photonic crystals (WPCs). We first show that light can be gradually slowed down in the defect waveguide (WG), which is obtained by gradually changing the period of the surrounding WPC along the propagation direction. In result, the waveguide mode gradually approaches the band edge region, while this phenomenon has three consequences. First, the Fourier components of propagating wave will be spatially separated as each frequency will reach its zero velocity at different positions. Second, as the wave slows down, it will penetrate deeper into the surrounding cladding, thus increasing the coupling efficiency between the WG and a nearby placed resonator. Third, the high density of states near the band edge result in highly efficient light scattering of a nearby placed resonator, which in turn increases the quality factor of the interaction. Following this idea, the acceptor type cavities, which are tuned to the localized frequencies, are side-coupled to the WG at respective wave localization areas. Furthermore, drop channels have been introduced to read-out the trapped spectra, showing that the targeted frequencies can be detected selectively. Compared to previous studies, our approach has the advantages of low radiation losses, the absence of any reflection feedback and both enhanced quality factor and transmission of the captured light.
ISBN: 978-1-5106-0665-4; 978-1-5106-0666-1
ISSN: 0277-786X
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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