摘要
We propose and experimentally demonstrate a 2×2 thermo-optic(TO) crossbar switch implemented by dual photonic crystal nanobeam(PCN)cavities within a silicon-on-insulator(SOI)platform.By thermally tuning the refractive index of silicon,the resonance wavelength of the PCN cavities can be red-shifted.With the help of the ultrasmall mode volumes of the PCN cavities,only~0.16 mW power is needed to change the switching state.With a spectral passband of 0.09 nm at the 1583.75 nm operation wavelength,the insertion loss(IL)and crosstalk(CT)performances were measured as IL(bar)=-0.2 dB,CT(bar)=-15 dB,IL(cross)=-1.5 dB,and CT(cross)=-15 dB.Furthermore,the thermal tuning efficiency of the fabricated device is as high as1.23 nm/mW.
We propose and experimentally demonstrate a 2×2 thermo-optic(TO)crossbar switch implemented by dual photonic crystal nanobeam(PCN)cavities within a silicon-on-insulator(SOI)platform.By thermally tuning the refractive index of silicon,the resonance wavelength of the PCN cavities can be red-shifted.With the help of the ultrasmall mode volumes of the PCN cavities,only~0.16 m W power is needed to change the switching state.With a spectral passband of 0.09 nm at the 1583.75 nm operation wavelength,the insertion loss(IL)and crosstalk(CT)performances were measured as IL?bar??-0.2 dB,CT?bar??-15 dB,IL?cross??-1.5 dB,and CT?cross??-15 dB.Furthermore,the thermal tuning efficiency of the fabricated device is as high as1.23 nm/m W.?2017 Chinese Laser Press
基金
National Natural Science Foundation of China(NSFC)(61235007,61505104,61605112)
Science and Technology Commission of Shanghai Municipality(15ZR1422800,16XD1401400)
National Key R&D Program of China(2016YFB0402501)