Abstract

We comprehensively calculated the photonic bands of the waveguide modes in practical lattice-shifted photonic crystal waveguides, which are completely cladded by silica. We assumed various lattice shifts and found that the shift of the second rows and the mixed shift of the first and third rows along the waveguide generate low-dispersion slow light with group indices of 34–36, which is higher than those with a conventional shift of the third rows, maintaining a wide bandwidth over 10 nm at telecom wavelengths. We fabricated the waveguides using a CMOS-compatible process and confirmed correspondence with the calculation results. We also compared 25-Gb/s photonic crystal slow light Mach–Zehnder modulators and confirmed the improvement of the modulation efficiency by second-row shifts.

© 2015 IEEE

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)

Wideband slow light with ultralow dispersion in a W1 photonic crystal waveguide

Jian Liang, Li-Yong Ren, Mao-Jin Yun, and Xing-Jun Wang
Appl. Opt. 50(31) G98-G103 (2011)

Wideband slow light and dispersion control in oblique lattice photonic crystal waveguides

Feng-Chun Leng, Wen-Yao Liang, Bin Liu, Tong-Biao Wang, and He-Zhou Wang
Opt. Express 18(6) 5707-5712 (2010)

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 ultralow high-order-dispersion photonic crystal slow-light waveguide

Lei Dai, Tong Li, and Chun Jiang
J. Opt. Soc. Am. B 28(7) 1622-1626 (2011)