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Chiral Lithography with Vortex Non-diffracted Laser for Orbital Angular Momentum Detection
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2024-01-12 , DOI: 10.1002/lpor.202301050 Jiaqun Li 1 , Jianfeng Yan 1 , Lan Jiang 2 , Liangti Qu 3
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2024-01-12 , DOI: 10.1002/lpor.202301050 Jiaqun Li 1 , Jianfeng Yan 1 , Lan Jiang 2 , Liangti Qu 3
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Chiroptical response, demonstrating chiral interaction between optical vortex and chiral structure, plays an important role in variety of fields like optics and material science. However, the flexibility and efficiency of chiral structure fabrication are limited due to mask requirement and a point-by-point constructing strategy. In this paper, a novel chiral lithography method is proposed that utilizes optical vortex phase beam shaping to achieve chiral structure processing with high efficiency and flexibility. By programming topological charges of the vortex phase, chiral structures with adjustable appearance, rotation, and chirality can be produced using femtosecond laser single pulse exposure. Transmittance measurements of fabricated chiral structures array confirm a 66% helical dichroism that is predicted by simulation. Moreover, with the aid of convolutional neural networks (CNN), an accuracy of 98% in Orbital Angular Momentum (OAM) recognition can be achieved. This chiral lithography method provides an alternative for chiral structure fabrication and holds promise in the development of chiral optics, optical communications, and next-generation optical devices.
中文翻译：
用于轨道角动量检测的涡旋非衍射激光手性光刻
手性光学响应展示了光学涡旋和手性结构之间的手性相互作用，在光学和材料科学等各个领域发挥着重要作用。然而，由于掩模要求和逐点构建策略，手性结构制造的灵活性和效率受到限制。本文提出了一种新颖的手性光刻方法，利用光学涡旋相位光束整形来实现高效、灵活的手性结构加工。通过对涡旋相的拓扑电荷进行编程，可以使用飞秒激光单脉冲曝光产生具有可调节外观、旋转和手性的手性结构。制造的手性结构阵列的透射率测量证实了模拟预测的 66% 螺旋二色性。此外，借助卷积神经网络（CNN），轨道角动量（OAM）识别的准确率可以达到98%。这种手性光刻方法为手性结构制造提供了一种替代方法，并有望在手性光学、光通信和下一代光学器件的开发中发挥作用。
更新日期：2024-01-12
中文翻译：
用于轨道角动量检测的涡旋非衍射激光手性光刻
手性光学响应展示了光学涡旋和手性结构之间的手性相互作用，在光学和材料科学等各个领域发挥着重要作用。然而，由于掩模要求和逐点构建策略，手性结构制造的灵活性和效率受到限制。本文提出了一种新颖的手性光刻方法，利用光学涡旋相位光束整形来实现高效、灵活的手性结构加工。通过对涡旋相的拓扑电荷进行编程，可以使用飞秒激光单脉冲曝光产生具有可调节外观、旋转和手性的手性结构。制造的手性结构阵列的透射率测量证实了模拟预测的 66% 螺旋二色性。此外，借助卷积神经网络（CNN），轨道角动量（OAM）识别的准确率可以达到98%。这种手性光刻方法为手性结构制造提供了一种替代方法，并有望在手性光学、光通信和下一代光学器件的开发中发挥作用。
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