Novel Kind of Semislow Light Photonic Crystal Waveguides With Large Delay-Bandwidth Product

作者：Hao, Ran^*; Cassan, Eric; Kurt, Hamza; Hou, Jin; Le Roux, Xavier; Marris-Morini, Delphine; Vivien, Laurent; Gao, Dingshan; Zhou, Zhiping; Zhang, Xinliang

来源：IEEE Photonics Technology Letters, 2010, 22(11): 844-846.

DOI：10.1109/LPT.2010.2046403

• Dispersion compensation
• group index
• group velocity dispersion (GVD)
• photonic crystals (PCs)
• slow light
• waveguide

A novel type of semislow light photonic crystal waveguide obtained by shifting the boundaries of a W1 waveguide in the direction of light propagation is presented. The structure produces unusual "U-type" group index-frequency curves, which results in a nearly constant group index n(g) over large bandwidth. A versatile control of n(g) (11 < n(g) < 210) with large normalized delay-bandwidth products ranging from 0.1363 to 0.3141 is obtained at the wavelength of 1550 nm using a unique geometrical parameter. Additionally, depending on the chosen waveguide geometry, ultralow group velocity dispersion (GVD) values in large slow light bandwidth can be achieved, with controllable positive or negative GVD.

• 出版日期2010-6-1
• 单位华中科技大学