Zimmermann Camila Aparecida, Amouzou Koffi Novignon, Sengupta Dipankar, Kumar Aashutosh, Demarquette Nicole Raymonde, Ung Bora
Department of Electrical Engineering, École de Technologie Supérieure, Montreal, QC, H3C 1K3, Canada.
Department of Mechanical Engineering, École de Technologie Supérieure, Montreal, QC, H3C 1K3, Canada.
Front Optoelectron. 2024 Jul 15;17(1):21. doi: 10.1007/s12200-024-00124-4.
Novel poly(dimethylsiloxane) (PDMS) doped with two different spiropyran derivatives (SP) were investigated as potential candidates for the preparation of elastomeric waveguides with UV-dependent optical properties. First, free-standing films were prepared and evaluated with respect to their photochromic response to UV irradiation. Kinetics, reversibility as well as photofatigue and refractive index of the SP-doped PDMS samples were assessed. Second, SP-doped PDMS waveguides were fabricated and tested as UV sensors by monitoring changes in the transmitted optical power of a visible laser (633 nm). UV sensing was successfully demonstrated by doping PDMS using one spiropyran derivative whose propagation loss was measured as 1.04 dB/cm at 633 nm, and sensitivity estimated at 115% change in transmitted optical power per unit change in UV dose. The decay and recovery time constants were measured at 42 and 107 s, respectively, with an average UV saturation dose of 0.4 J/cm. The prepared waveguides exhibited a reversible and consistent response even under bending. The sensor parameters can be tailored by varying the waveguide length up to 21 cm, and are affected by white light and temperatures up to 70 ℃. This work is relevant to elastomeric optics, smart optical materials, and polymer optical waveguide sensors.
研究了掺杂两种不同螺吡喃衍生物（SP）的新型聚二甲基硅氧烷（PDMS），作为制备具有紫外线依赖光学特性的弹性波导的潜在候选材料。首先，制备了独立薄膜，并评估了它们对紫外线照射的光致变色响应。评估了SP掺杂PDMS样品的动力学、可逆性以及光疲劳和折射率。其次，通过监测可见激光（633 nm）的传输光功率变化，制备并测试了SP掺杂的PDMS波导作为紫外线传感器。通过使用一种螺吡喃衍生物掺杂PDMS成功证明了紫外线传感，其在633 nm处的传播损耗测量为1.04 dB/cm，每单位紫外线剂量变化时传输光功率的灵敏度估计为115%。衰减和恢复时间常数分别测量为42和107 s，平均紫外线饱和剂量为0.4 J/cm²。制备的波导即使在弯曲情况下也表现出可逆且一致的响应。传感器参数可以通过改变波导长度至21 cm来调整，并且受到白光和高达70℃的温度影响。这项工作与弹性光学、智能光学材料和聚合物光波导传感器相关。
