Abstract

In 2-D photonic crystals (PhCs), we demonstrate two novel line-defects slow light waveguides with little group velocity dispersion (less than 1 ps/nm/mm) in which light can propagate with little distortion in a wide frequency range. The first waveguide is composed of air rings located at the each side of the line-defect and the results indicate that a very flat band corresponding to average group velocity of 0.04 c can be achieved in the bandwidth of 4.9 THz. The second waveguide in which the high-index ridge waveguide is sandwiched between two photonic crystals may yield an average group velocity of 0.01777c over a bandwidth of 2.9 THz. Numerical simulations by finite-difference time domain (FDTD) verify the results of the frequency domain.

© 2009 IEEE

Ultrawideband air-core plasmonic slow-light waveguide with ultralow high-order dispersion

Lei Dai, Juan Xia, and Chun Jiang
Appl. Opt. 50(23) 4566-4573 (2011)

Wideband slow light with low dispersion in asymmetric slotted photonic crystal waveguides

Bo Liu, Tao Wang, Jian Tang, Xiaoming Li, Chuanbo Dong, and Yu He
Appl. Opt. 52(34) 8394-8401 (2013)

Wideband and low dispersion slow light by chirped photonic crystal coupled waveguide

Daisuke Mori and Toshihiko Baba
Opt. Express 13(23) 9398-9408 (2005)

Wideband and low-dispersion engineered slow light using liquid infiltration of a modified photonic crystal waveguide

Mohammad Pourmand, Arash Karimkhani, and Fakhroddin Nazari
Appl. Opt. 55(35) 10060-10066 (2016)

Low-group-velocity and low-dispersion slow light in photonic crystal waveguides

Shousaku Kubo, Daisuke Mori, and Toshihiko Baba
Opt. Lett. 32(20) 2981-2983 (2007)