Ultrasensitive and ultrafast nonlinear optical characterization of surface plasmons
Ultrasensitive and ultrafast nonlinear optical characterization of surface plasmons
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DOI：
10.1063/5.0083239
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发表时间：
2022-03
期刊：
影响因子：
6.1
通讯作者：
Jingyu Wang;Min Gao;Yonglin He;Zhilin Yang
中科院分区：
文献类型：
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作者：
Jingyu Wang;Min Gao;Yonglin He;Zhilin Yang
随着纳米科学和纳米技术的快速发展，等离子体激元学已经成为一门重要而迷人的学科。表面等离子体激元（Surface Plasmon，SP）为等离子体学奠定了坚实的物理基础，在超高分辨率光谱学、光调制、可再生能源、通信技术等领域有着广泛的应用。SP的灵敏光学特性，包括远/近场光学、空间分辨光谱学和SP的时间分辨行为等，引起了人们广泛的兴趣。在本次研究更新中，首次介绍了亚辐射SP的超灵敏光学特性。然后，非线性等离子体激元的不同表征方法，包括等离子体激元增强的二次谐波产生和等离子体激元增强的和频产生，在一些经典的纳米结构进行了演示。SPs的瞬态光学特性也表现在一些定义明确的纳米结构，使时间分辨行为的深入实现。最后，对SPs光学特性研究的未来发展方向进行了展望。
Amid the rapid development of nanosciences and nanotechnologies, plasmonics has emerged as an essential and fascinating discipline. Surface plasmons (SPs) lay solid physical foundations for plasmonics and have been broadly applied to ultrahigh-resolution spectroscopy, optical modulation, renewable energy, communication technology, etc. Sensitive optical characterizations for SPs, including far/near-field optics, spatial-resolved spectroscopy, and time-resolved behaviors of SPs, have prompted intense interest in diverse fields. In this Research Update, the ultrasensitive optical characterization for sub-radiant SPs is first introduced. Then, distinct characterization methods of nonlinear plasmonics, including plasmon-enhanced second harmonic generation and plasmon-enhanced sum frequency generation, are demonstrated in some classical nanostructures. Transient optical characterizations of SPs are also demonstrated in some well-defined nanostructures, enabling the deep realization of time-resolved behaviors. Finally, future prospects and efforts of optical characterization for SPs are proposed.