In situ measurement of the effective nonlinear absorption order in multiphoton photoresists
In situ measurement of the effective nonlinear absorption order in multiphoton photoresists
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多光子光刻胶有效非线性吸收级的原位测量
DOI：
10.1002/lpor.201600079
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发表时间：
2016
影响因子：
11
通讯作者：
J. Fourkas
中科院分区：
文献类型：
--
作者：
Z. Tomova;N. Liaros;Sandra A. Gutierrez Razo;Steven M. Wolf;J. Fourkas
了解多光子光致抗蚀剂中有效非线性吸收的阶数是开发改进的多光子吸收聚合（MAP）材料的关键因素。这种非线性的直接测量已被证明具有挑战性。提出了一种称为2-光束起始阈值（2-BIT）的新技术，该技术允许使用简单的光学布置来明确地原位测量有效非线性吸收的阶数，该光学布置可以与几乎任何MAP设置一起使用。该技术是基准使用三种常见的商业光引发剂，已在MAP和一种常见的染料，作为一种光引发剂。线性吸收光谱被证明是一个穷人的预测在给定波长的非线性吸收的有效阶数。令人惊讶的是，对于这些引发剂中的两种，有效的非线性吸收过程由800 nm波长范围内的3光子吸收主导，这表明2-BIT是识别可以提高MAP分辨率的引发剂的有价值的手段。
Knowledge of the order of the effective nonlinear absorption in multiphoton photoresists is a key element in the development of improved materials for multiphoton absorption polymerization (MAP). The direct measurement of this nonlinearity has proven challenging. A new technique called 2‐beam initiation threshold (2‐BIT) is presented that allows for the unambiguous, in situ measurement of the order of the effective nonlinear absorption using a simple optical arrangement that can be employed with virtually any MAP setup. This technique is benchmarked using three common commercial photoinitiators that have been used previously in MAP and one common dye that acts as a photoinitiator. The linear absorption spectrum is demonstrated to be a poor predictor of the effective order of nonlinear absorption at a given wavelength. Surprisingly, for two of these initiators the effective nonlinear absorption process is dominated by 3‐photon absorption in the 800 nm wavelength range, suggesting that 2‐BIT is a valuable means of identifying initiators that can improve the resolution of MAP.
通过水溶液中的两光刻光刻对水凝胶的直接三维微分化。
影响因子：
8.6
作者：
Jhaveri, Shalin J.;McMullen, Jesse D.;Sijbesma, Rint;Tan, Loon-Seng;Zipfel, Warren;Ober, Christopher K.
通讯作者：
Ober, Christopher K.