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首页> 外文期刊>ACS applied materials & interfaces >Improved Transfer Quality of CVD-Grown Graphene by Ultrasonic Processing of Target Substrates: Applications for Ultra-fast Laser Photonics
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Improved Transfer Quality of CVD-Grown Graphene by Ultrasonic Processing of Target Substrates: Applications for Ultra-fast Laser Photonics

机译：通过目标基板的超声处理提高CVD生长的石墨烯的传输质量：超快激光光子学的应用

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In this paper, we experimentally found that the transfer quality of CVD-grown graphene could be improved by ultrasonic processing (UP) of target substrates thanks to the improved hydrophilicity. Atomic force micrograph and Raman spectroscopy revealed that the graphene films transferred onto the target substrate with UP possess less wrinkles and defects than that of the sample without UP. The improvement technique endows graphene more suitable for photonics applications because of its weaker optical loss, higher optical damage threshold and longer stability. By integrating a fiber pigtailed graphene (treated by UP) device into a fiber laser cavity, we could obtain narrower mode-locked pulse with higher optical-to- optical conversion efficiency and better optical spectral profile, in contrast with that without UP, which further verify the improved transfer quality of graphene by the UP technique. We anticipate that this transfer technique may be applicable to boost the performance of other graphene photonics devices, such as optical modulator, detector, polarizer, etc.
机译：在本文中，我们通过实验发现，由于亲水性的提高，可以通过对目标衬底进行超声处理（UP）来提高CVD生长的石墨烯的转移质量。原子力显微镜和拉曼光谱显示，与不使用UP的样品相比，使用UP转移到目标衬底上的石墨烯膜具有较少的皱纹和缺陷。改进技术使石墨烯具有更弱的光损耗，更高的光损伤阈值和更长的稳定性，从而使其更适合光子学应用。通过将光纤尾纤石墨烯（经过UP处理）装置集成到光纤激光器腔中，与不使用UP相比，我们可以获得具有更高的光到光转换效率和更好的光谱分布的更窄的锁模脉冲。验证了通过UP技术改善了石墨烯的传输质量。我们预计，这种转移技术可能适用于提高其他石墨烯光子器件的性能，例如光学调制器，检测器，偏振器等。

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