We introduce a photonic crystal nanocavity consisting of one-dimensional periodic nanorods embedded in a deformable polydimethylsiloxane substrate, which exhibits a high-quality factor and a large wavelength response to the applied strain. By further investigating its wavelength response to nonaxial planar strains, we propose and experimentally demonstrate a sensor unit that can precisely identify different planar strains, including their application direction, type, and value. This sensor prototype with small footprint and feasible coupling with optical waveguides could provide additional flexibility for strain analysis in a wide range of fields.

中文翻译：

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一维光子晶体应变传感器

我们介绍了一种光子晶体纳米腔，它由嵌入在可变形聚二甲基硅氧烷衬底中的一维周期性纳米棒组成，该纳米棒表现出高品质因数和对所施加应变的大波长响应。通过进一步研究其对非轴向平面应变的波长响应，我们提出并实验证明了一种传感器单元，可以精确识别出不同的平面应变，包括其施加方向，类型和值。这种传感器原型具有较小的占地面积，并且可以与光波导耦合，可以为广泛领域中的应变分析提供额外的灵活性。