In this report, we propose an idea of connecting 1D photonic crystal (PhC) nanocavity with novel waveguide-like strain shapers in a polydimethylsiloxane substrate. In theory, the induced film-edge strain by the strain shapers can significantly enhance the wavelength tunability of PhC nanocavity under different applied stress. By our nanofabrication process, we realize this idea in the form of a tunable nanolaser. In experiments, the nanolaser shows the enhanced wavelength tunability both under stretching and compressive stress. By investigating the effects of PhC periods and length of the strain shapers, we obtain an optimized lasing wavelength tunability of -13.9 nm under every percentage strain variation in experiments. When further taking the 2nd-order mode in the nanocavity into consideration, we observe a wide lasing wavelength tuning range over 160 nm, which takes only the applied strain Δξtot of ±0.05. In addition to the large wavelength response beneficial for tunable nanolasers and optical strain sensors, we also believe that this waveguide-like strain shapers can serve as the optical interconnections at the same time in the flexible photonic circuits.

中文翻译：

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通过类波导应变整形器增强光子晶体纳米激光器的波长可调性


在本报告中，我们提出了一种将一维光子晶体（PhC）纳米腔与聚二甲基硅氧烷基底中的新型波导状应变整形器连接的想法。理论上，应变整形器诱导的薄膜边缘应变可以显着增强光子碳纳米腔在不同外加应力下的波长可调性。通过我们的纳米制造工艺，我们以可调谐纳米激光器的形式实现了这个想法。在实验中，纳米激光器在拉伸和压缩应力下显示出增强的波长可调性。通过研究 PhC 周期和应变整形器长度的影响，我们在实验中的每个应变变化百分比下获得了 -13.9 nm 的优化激光波长可调性。当进一步考虑纳米腔中的二阶模式时，我们观察到超过 160 nm 的宽激光波长调谐范围，仅需要 ±0.05 的外加应变 Δψtot。除了有利于可调谐纳米激光器和光学应变传感器的大波长响应之外，我们还相信这种类似波导的应变整形器可以同时用作柔性光子电路中的光学互连。