Enhanced cavity-waveguide interaction in three-dimensional photonic crystals

Zeki Hayran; Mirbek Turduev; Darius Gailevičius; Vygantas Mizeikis; Saulius Juodkazis; Mangirdas Malinauskas; Kestutis Staliunas; Hamza Kurt

doi:10.1117/12.2252365

20 February 2017 Enhanced cavity-waveguide interaction in three-dimensional photonic crystals

Zeki Hayran, Mirbek Turduev, Darius Gailevičius, Vygantas Mizeikis, Saulius Juodkazis, Mangirdas Malinauskas, Kestutis Staliunas, Hamza Kurt

Author Affiliations +

Proceedings Volume 10112, Photonic and Phononic Properties of Engineered Nanostructures VII; 1011228 (2017) https://doi.org/10.1117/12.2252365
Event: SPIE OPTO, 2017, San Francisco, California, United States

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.

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Zeki Hayran, Mirbek Turduev, Darius Gailevičius, Vygantas Mizeikis, Saulius Juodkazis, Mangirdas Malinauskas, Kestutis Staliunas, and Hamza Kurt "Enhanced cavity-waveguide interaction in three-dimensional photonic crystals", Proc. SPIE 10112, Photonic and Phononic Properties of Engineered Nanostructures VII, 1011228 (20 February 2017); https://doi.org/10.1117/12.2252365

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KEYWORDS

Photonic crystals

Waveguides

Electronic filtering

Resonators

Cladding

Laser applications

Light scattering

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