Zhang Weiwei, Serna Samuel, Le Roux Xavier, Vivien Laurent, Cassan Eric
Opt Lett. 2016 Feb 1;41(3):532-5. doi: 10.1364/OL.41.000532.
We experimentally investigate refractive index sensing in silicon slot waveguide ring resonators by the detection of the giant shift of the ring transmission spectrum envelope enabled by the following specific conditions: the slot waveguide cross section as well as the ring couplers have been designed to lead to a V-shaped microring resonator spectrum modulated by the classical frequency comb and exhibiting quality factor peaks of 2000-6000 around λ=1.5 μm. By tracking the spectrum envelope wavelength shift, sensitivity up to S=1,300 nm per refraction index unit (RIU) is reported when the slots are filled by liquids with refraction index values close to 1.33.
我们通过检测在以下特定条件下实现的环形传输光谱包络的巨大偏移，对硅槽波导环形谐振器中的折射率传感进行了实验研究：槽波导横截面以及环形耦合器的设计使得产生由经典频率梳调制的V形微环谐振器光谱，并且在λ = 1.5μm附近呈现出2000 - 6000的品质因数峰值。通过跟踪光谱包络的波长偏移，当槽中填充折射率值接近1.33的液体时，报告的灵敏度高达每折射率单位（RIU）S = 1300nm。
