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Microfluidic tuning of linear and nonlinear absorption in graphene oxide liquid crystals

机译：石墨烯氧化物液晶线性和非线性吸收的微流体调谐

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Manipulation of the nonlinear optical response of materials plays a significant role in photonics applications; however, it may be irreversible, untunable, and uncontrollable, which makes it difficult. In this Letter, we present a mechanical-hydrodynamical approach through a microchannel to tune the nonlinear absorption response of graphene oxide liquid. crystals. In this material, the optical properties depend on the flake orientation. This feature has helped us to study empirically the dependency of the nonlinear absorption coefficients to external hydrodynamical force by employing the Z-scan technique. The experimental results show that increasing the flow rate in the microchannel enhances both linear and nonlinear absorption coefficients and, as a result, reduces the laser beam transmission through the sample. It has been observed that the percentage change in the nonlinear absorption coefficient of the sample is significant due to the flow rate. (C) 2021 Optical Society of America
机译：材料非线性光学响应的操纵在光子学应用中起着重要作用；然而，它可能是不可逆转的、无法控制的，这使它变得困难。在这封信中，我们提出了一种通过微通道调节氧化石墨烯液体非线性吸收响应的机械流体动力学方法。水晶。在这种材料中，光学性能取决于薄片的取向。这一特性有助于我们利用Z扫描技术从经验上研究非线性吸收系数对外部水动力的依赖性。实验结果表明，增加微通道中的流速可以提高线性和非线性吸收系数，从而降低激光束通过样品的传输。已经观察到，由于流速，样品非线性吸收系数的百分比变化非常显著。（2021）美国光学学会

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