Investigation on the generation of photonic crystals using two-photon polymerization (2PP) of inorganic-organic hybrid polymers with ultra-short laser pulses

研究利用超短激光脉冲无机-有机杂化聚合物的双光子聚合（2PP）生成光子晶体

• 批准号: 5404259
• 负责人: Professor Dr. Boris Chichkov, Ph.D.
• 金额: --
• 依托单位: Institut für Quantenoptik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2003
• 资助国家: 德国
• 起止时间: 2002-12-31 至 2006-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5404259?language=en
• 关键词: Investigation; generation; photonic; crystals; using

In the framework of the proposed project, a novel and flexible technique for the generation of photonic structures or demonstrators, respectively, will be realized by means of two-photon polymerization (2PP) of inorganic-organic hybrid polymer (ORMOCER) resins by irradiation with femtosecond laser pulses. This technique enables one to generate any 2D or 3D photonic crystals with structural dimensions of approximately 100 nm as well as to generate integrated systems of 2D or 3D photonic crystals including waveguides to connect the crystals to any standard characterization equipment. Inorganic-organic hybrid polymers are transparent for visible or near-IR laser light. If the laser light reaches a particular threshold intensity, the organic cross-linking of the resins monomers can be initiated due to two-photon absorption. This threshold intensity is achieved for strongly focussed, ultrashort (~10-13 sec) laser pulses at a moderate average power (less than 100 mW). If the focus is moved three-dimensionally within the resin, polymerization along the path of the focus occurs. Since 2PP has a well-defined threshold fluence, lateral and vertical structures can be generated with a suitable set of parameters such as, e.g., pulse energy and pulse number, which are below the diffraction limit of the focus volume of the laser radiation.

在拟议的项目的框架内，一种新颖而灵活的技术，用于产生光子结构或示范者，分别，将通过双光子聚合（2 PP）的无机-有机杂化聚合物（ORMOCER）树脂通过飞秒激光脉冲照射来实现。该技术使人们能够产生具有大约100 nm的结构尺寸的任何2D或3D光子晶体，以及产生包括波导的2D或3D光子晶体的集成系统，以将晶体连接到任何标准表征设备。无机-有机杂化聚合物对于可见光或近红外激光是透明的。如果激光达到特定的阈值强度，则树脂单体的有机交联可以由于双光子吸收而引发。这种阈值强度是在中等平均功率（小于100 mW）下强聚焦超短（~10-13秒）激光脉冲实现的。如果焦点在树脂内三维地移动，则聚合沿着焦点的路径发生。由于2 PP具有明确定义的阈值注量，因此可以用合适的参数集生成横向和垂直结构，例如，脉冲能量和脉冲数，其低于激光辐射的聚焦体积的衍射极限。