Atomic Carbon Spraying: Direct Growth of Graphene on Customized 3D Surfaces of Ultrafast Optical Devices,Advanced Optical Materials

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Atomic Carbon Spraying: Direct Growth of Graphene on Customized 3D Surfaces of Ultrafast Optical Devices
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-04-20 , DOI: 10.1002/adom.201902091
Siam Uddin _{1,

2} , Yong‐Won Song _{1,

2}

Affiliation

Despite the long‐standing efforts to develop 3D graphene, which is critical for practical electronic, optoelectronic, and optical devices, the lack of synthetic methods and the use of conventional transfer approaches have limited its realization. Herein, a metal‐free, etching‐free, transfer‐free, direct synthesis of functional graphene is introduced that contours 3D‐structured surfaces of nonlinear optical devices, thereby maximizing the nonlinear interaction of graphene with guided light. Central to this method is the use of γ‐Al₂O₃, a ceramic catalyst, which generates carbon atoms from the precursor molecules and supplies them for the graphene synthesis on the 3D structures located near the catalyst through spatial diffusion, described as atomic carbon spraying (ACS). The optical nonlinearity facilitated by ACS‐processed 3D graphene is experimentally verified by realizing both passively mode‐locked laser with a pulse width of 770 fs and ultrafast optical switching with 67% enhancement in nonlinear effect over 6 mm interaction length.

中文翻译：

原子碳喷涂：石墨烯在超快光学设备的定制3D表面上直接生长

尽管长期致力于开发3D石墨烯，这对于实际的电子，光电和光学设备至关重要，但由于缺乏合成方法和常规转移方法的使用，其实现受到了限制。本文介绍了一种无金属，无蚀刻，无转移的功能性石墨烯直接合成方法，该方法使非线性光学器件的3D结构表面轮廓化，从而最大程度地增强了石墨烯与导光的非线性相互作用。该方法的核心是使用γ‐Al ₂ O ₃，一种陶瓷催化剂，从前驱物分子生成碳原子，并通过空间扩散将其提供给位于催化剂附近的3D结构上的石墨烯合成，称为原子碳喷涂（ACS）。通过实现770 fs脉冲宽度的无源锁模激光器和在6 mm相互作用长度上非线性效应增强67％的超快光开关，可以对ACS处理的3D石墨烯促进的光学非线性进行实验验证。

更新日期：2020-06-19

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