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

We proposed and fabricated a double-slots photonic crystal waveguides (PCWGs) Structure formed by introducing two slots into PCWGs with air-bridge structure oil 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 ill the W3 PCWG. Additionally, dependence of the dip oil temperature in the double-slots PCWG was measured and a temperature coefficient 0.159 nm/degrees C call be concluded. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3258072]