Andersen Thomas B, Bozhevolnyi Sergey I, Markey Laurent, Dereux Alain
Institute of Technology and Innovation (ITI), University of Southern Denmark, Odense M, Denmark.
Opt Express. 2011 Dec 19;19(27):26423-8. doi: 10.1364/OE.19.026423.
We demonstrate optical fiber-pigtailed temperature sensors based on dielectric-loaded surface plasmon-polariton waveguide-ring resonators (DLSPP-WRRs), whose transmission depends on the ambient temperature. The DLSPP-WRR-based temperature sensors represent polymer ridge waveguides (~1×1 µm(2) in cross section) forming 5-µm-radius rings coupled to straight waveguides fabricated by UV-lithography on a 50-nm-thick gold layer atop a 2.3-µm-thick CYTOP layer covering a Si wafer. A broadband light source is used to characterize the DLSPP-WRR wavelength-dependent transmission in the range of 1480-1600 nm and to select the DLSPP-WRR component for temperature sensing. In- and out-coupling single-mode optical fibers are then glued to the corresponding access (photonic) waveguides made of 10-µm-wide polymer ridges. The sample is heated from 21°C to 46 °C resulting in the transmission change of ~0.7 dB at the operation wavelength of ~1510 nm. The minimum detectable temperature change is estimated to be ~5.1∙10(-3) °C for the bandwidth of 1 Hz when using standard commercial optical detectors.
我们展示了基于介质加载表面等离子体激元 - 极化子波导环形谐振器（DLSPP - WRRs）的光纤尾纤温度传感器，其传输取决于环境温度。基于DLSPP - WRR的温度传感器由聚合物脊形波导（横截面约为1×1 µm(2)）构成，这些波导形成半径为5 µm的环，并与通过紫外光刻在覆盖硅晶片的2.3 µm厚CYTOP层上的50 nm厚金层上制造的直波导耦合。使用宽带光源来表征DLSPP - WRR在1480 - 1600 nm范围内与波长相关的传输，并选择用于温度传感的DLSPP - WRR组件。然后将输入和输出单模光纤粘贴到由10 µm宽聚合物脊制成的相应接入（光子）波导上。样品从21°C加热到46°C，在约1510 nm的工作波长处导致约0.7 dB的传输变化。当使用标准商用光学探测器时，对于1 Hz的带宽，估计最小可检测温度变化约为5.1∙10(-3) °C。
