Engineering the group velocities of the guiding modes in two-dimensional annular coupled-cavity waveguides

作者：Feng Shuai^*; Chen Xiao; Yang Di; Yang Yuping; Wang Yiquan

来源：Journal of Optics, 2011, 13(1): 015705.

DOI：10.1088/2040-8978/13/1/015705

• photonic crystal
• microcavity
• coupled-resonator optical waveguide
• group velocity

The propagating characteristics of the electromagnetic waves through annular coupled-resonator optical waveguides (CROWs) based on two-dimensional square-lattice photonic crystals are studied by the finite-difference time-domain method. Comparing with the traditional line-typed CROWs, the annular CROW studied in this paper have more minibands within the bandgap. With the increasing of the distance between two adjacent annular cavities, the values of the corresponding group velocities and the field distributions of the guiding modes are numerically calculated. When the annular cavities are interlaced in the direction perpendicular to the waveguide, the group velocities can be further reduced and a maximum value of 0.000 37c can be obtained.

• 出版日期2011-1
• 单位中央民族大学