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PIER PIER B PIER C PIER M PIER Letters
2014-11-17
Realizing Flexible Ultra-Flat-Band Slow Light in Hybrid Photonic Crystal Waveguides for Efficient Out-of-Plane Coupling
By
Jianhao Zhang,

    Dr. Jianhao Zhang

    Zhejiang Provincial Key Laboratory for Sensing Technologies, Zhejiang University, East Building No.5, Zijingang Campus

    Zhejiang University

    China

    Homepage

Yaocheng Shi,

    Dr. Yaocheng Shi

    Zhejiang University

    China

    Homepage

Sailing He

    Prof. Sailing He

    Department of Electromagnetic Theory

    Royal Institute of Technology

    Sweden

    Homepage

Progress In Electromagnetics Research, Vol. 149, 281-289, 2014
doi:10.2528/PIER14102113
Abstract
The realization of slow light with ultra-flat dispersion in hybrid photonic crystal (HPhC) waveguide is systematically investigated. Metal strips have been introduced to the photonic crystal (PhC) waveguide. The dispersion of the odd mode is commendably flattened in the leaky region. Ultra-flat-band slow light with nearly constant average group indices of 192 over 2 nm (i.e., 330 GHz) bandwidth is achieved. Flexible tuning for the ultra-high group index can also be achieved while keeping the normalized delay-bandwidth product fairly high. The introduction of the metal strips is further demonstrated to help reduce the azimuthal angle of the farfield and provide a high coupling efficiency.
Citation
Jianhao Zhang, Yaocheng Shi, and Sailing He, "Realizing Flexible Ultra-Flat-Band Slow Light in Hybrid Photonic Crystal Waveguides for Efficient Out-of-Plane Coupling," Progress In Electromagnetics Research, Vol. 149, 281-289, 2014.
doi:10.2528/PIER14102113
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