Fast response and low power consumption 1x2 thermo-optic switch based on dielectric-loaded surface plasmon polariton waveguides

作者：Qi, Zhipeng; Hu, Guohua^*; Yun, Binfeng; Zhang, Xiong; Cui, Yiping

来源：Journal of Modern Optics, 2016, 63(14): 1354-1363.

DOI：10.1080/09500340.2016.1150529

• 1 x 2 thermo-optic switch
• dielectric-loaded SP waveguide
• LFR polymer ridge
• switching power
• switching time
• crosstalk

In this paper, we present a 1 x 2 thermo-optic (TO) switch based on the integration of the dielectric-loaded surface plasmon polariton (SPP) waveguides with the silicon nanowires. Liquid-curable fluorinated resin (LFR) made of perfluorinated polymer was adopted as the ridge, which has a TO coefficient twice more than that of polymethyl methacrylate, leading to a significant decrease in the power consumption. It was shown that the response time of the dielectric-loaded SPP waveguide could be improved through optimizing the dimensions of the LFR polymer ridge without loss of relative high figure of merit and large confinement factor. Performance characteristics of such a 1 x 2 TO switch operating at a telecom wavelength of 1550 nm was investigated theoretically from the analysis of both heat and optical fields. The results reveal that a switching power as low as 7 mW and an extremely short switching time (with rise time of 3 mu s and fall time of 6.7 mu s) could be achieved with the proposed dielectric-loaded SPP-based 1 x 2 TO switch. In addition, the crosstalk could be enhanced to at least 40 dB with the applied power of 7 mW at the wavelength of 1550 nm, and it could be retained to be above 20 dB in the wavelength spectrum of 1500-1600 nm during the on/off state.

• 出版日期2016
• 单位东南大学