Suppression of photothermal convection using silicon carbide substrates for optofluidics experiments
Suppression of photothermal convection using silicon carbide substrates for optofluidics experiments
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DOI：
10.1016/j.rineng.2020.100097
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发表时间：
2020-06
期刊：
影响因子：
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通讯作者：
Ya-Tang Yang;K. Namura;M. Tsai;Motofumi Suzuki
中科院分区：
文献类型：
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作者：
Ya-Tang Yang;K. Namura;M. Tsai;Motofumi Suzuki
玻璃基板上的光热对流一直是光流变测量的主要障碍。在这里，我们展示了一种策略，通过使用高导热系数的碳化硅衬底来抑制光热对流，以实现最佳的散热。我们测量并比较了镀金碳化硅衬底上的光热对流流型，证实了镀金碳化硅衬底上的光热对流确实比镀金玻璃衬底上的要小得多。我们进一步证明了用硅碳作为光学窗口和稳定的等离子体光陷集实现了无中断的光加速。该技术一般适用于减小光热加热和基于图案化等离子体纳米结构的等离子体光钳。
Photothermal convection on glass substrate has been a major obstacle for optofluidic measurement at elavated optical power. Here we demonstrate a strategy to suppress the photothermal convection by using silicon carbide substrates of high thermal conductivity for optimal heat sinking. We measure and compare the photothermal convection flow pattern and confirm that the photothermal convection on gold coated silicon carbide substrate is indeed much smaller than that on gold coated glass substrate. We further demonstrate the undisrupted optical acceleration using silicon carbon as optical window and stable plasmonic optical trapping. This technique is generally applicable to reduce photothermal heating and plasmonic optical tweezers based on patterned plasmonic nanostructures.