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    Öğe
    Broadband one way propagation via dielectric waveguides with unequal effective index
    (Institute of Electrical and Electronics Engineers Inc., 2014) Öner, Bilgehan Barış; Üstün, Kadir; Kurt, Hamza; Okyay, Ali Kemal; Turhan Sayan, Gönül
    We present an efficient approach for broad band one way propagation of light by parallel and unequal dielectric waveguides leading different effective phase shifts. Three dimensional numerical simulations show that 30% operating bandwidth is achieved. © 2014 IEEE.
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    Öğe
    Large bandwidth mode order converter by differential waveguides
    (Optical Society of American (OSA), 2015) Öner, Bilgehan Barış; Üstün, Kadir; Kurt, Hamza; Okyay, Ali Kemal; Turhan Sayan, Gönül
    In this article, we propose a large bandwidth mode-order converter design by dielectric waveguides with equal lengths but different cross-sectional areas. The efficient conversion between even and odd modes is verified by inducing required phase difference between the equal length waveguides of different widths. Y-junctions are composed of both tapered mode splitter and combiner to connect mono-mode waveguide to multi-mode waveguide. The converted mode profiles at the output port show that the device operates successfully at designed wavelengths with wide bandwidth. This study provides a novel technique to implement compact mode order converters and direction selective/sensitive photonic structures. © 2015 Optical Society of America.