Temperature dependence of ministop band in double-slots photonic crystal waveguides

Kaiyu Cui; Yidong Huang; Gengyan Zhang; Yongzhuo Li; Xuan Tang; Xiaoyu Mao; Qiang Zhao; Wei Zhang; Jiangde Peng
November 2009
Applied Physics Letters;11/9/2009, Vol. 95 Issue 19, p191901
Academic Journal
We proposed and fabricated a double-slots photonic crystal waveguides (PCWGs) structure formed by introducing two slots into PCWGs with air-bridge structure on silicon-on-insulator substrate. The mode characteristics of double-slots PCWGs were investigated theoretically and experimentally. The transmission spectra present a sharp and deep dip (22 dB with bandwidth of 6 nm) caused by ministop band in the proposed structure, which is 15 dB deeper than that in the W3 PCWG. Additionally, dependence of the dip on temperature in the double-slots PCWG was measured and a temperature coefficient 0.159 nm/°C can be concluded.


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