手性作为多肽分子的基本属性，已被证明可以用于调控多肽超分子体系的结构和性能，但目前关于手性对分子到超分子层次的作用机制的影响仍知之甚少。本文以β-淀粉样蛋白（Amyloid-β protein，Aβ）的核心识别序列二苯丙氨酸（Diphenylalanine，_L-Phe-_L-Phe）为研究对象，探索了_L-Phe-_L-Phe（FF）与对映体_D-Phe-_D-Phe（ff）的自组装体和共组装体的纳米结构变化，并对其分子间相互作用方式进行了分析。结果表明：FF和ff自组装形成了相似的纳米纤维结构，其手性主要影响肽分子间以及肽分子与水分子间的相互作用；相比于自组装，在FF和ff的共组装体中，X射线衍射（X-ray Diffraction，XRD）分析证实了新的晶相形成。上述研究对理解淀粉样纤维的形成机制和多肽超分子材料的设计有很好的借鉴意义。

激光诱导周期性表面结构（Laser-Induced Periodic Surface Structures，LIPSS）是一种在激光辐照下自发生成的超衍射极限结构，但其结构类型较为单一。提出了一种新型的二维图案化激光纳米加工方法，通过同时利用激光诱导的热效应及表面等离激元干涉，在正交的两个方向上分别形成褶皱和LIPSS两种周期性结构。这种方法仅通过单步辐照就能在薄膜材料表面生成二维褶皱LIPSS，从而丰富LIPSS的结构类型。同时，通过调整加工材料的膜厚或基底，以及改变入射激光波长或角度，可以分别调制二维纳米结构在两个正交方向上的周期。此外，通过激光偏振也可以调控该结构的取向。该方法能够进一步拓宽基于LIPSS的可加工表面纳米结构的种类及应用。

红外热敏探测器不管是在**还是在民用领域都有着非常重要的应用。传统的红外热敏探测器主要采用宽光谱吸收的方式，这虽然赋予了器件宽带响应的特点，但同时也会因为引入了不必要的辐射热导而增加本底噪声，从而限制了器件的探测性能极限。研究表明，具有窄带选择性吸收的热敏探测器在特定的条件下可以突破这一极限。经过精心设计的人工微纳结构不但可以实现波长选择性吸收来降低器件的辐射热导，而且由于其具有亚波长特性，还可以大大降低器件的热容，从而为实现高性能的红外热敏探测器提供了可能性。本文在简单介绍红外探测器基本概念的基础上，聚焦测辐射热计、温差电偶和热释电探测器件，回顾总结基于人工微结构体系的光谱选择性红外热敏探测器的相关研究进展。

以多元金属纳米薄膜（金、银）为基底，利用飞秒激光加工技术制备得到多元等离子体纳米结构，并研究了其局域表面等离子体共振效应（ Local Surface Plasmon Resonance，LSPR）和表面增强拉曼散射（Surface Enhanced Raman Scattering，SERS）性能。利用时域有限差分（Finite Difference Time Domain，FDTD）软件模拟了不同情况下（单层金膜、金银双层金属薄膜的平面以及阵列结构）的电场分布情况。根据仿真结果，相较于平面金属膜来说，飞秒激光制备的微纳结构阵列附近区域产生电磁场增强，集中在结构边缘处，且其强度变化与预期结果基本保持一致。此外，使用浓度为10⁻⁴ M和10⁻⁶ M的罗丹明（R6G）溶液进行SERS性能测试。测试的结果表明，单层平面金膜基本没有SERS峰值信号出现，而单层金膜上制备的等离子体纳米结构附近出现峰值信号，双层金属薄膜上制备的等离子体纳米结构展现出更高的SERS峰值信号。多元金属等离子体纳米结构展示出更强的局域表面等离子体共振效应，从而在表面增强拉曼散射、光催化、生物传感等领域具有广泛的应用。

This paper reports the fabrication of regular large-area laser-induced periodic surface structures (LIPSSs) in indium tin oxide (ITO) films via femtosecond laser direct writing focused by a cylindrical lens. The regular LIPSSs exhibited good properties as nanowires, with a resistivity almost equal to that of the initial ITO film. By changing the laser fluence, the nanowire resistances could be tuned from 15 to 73 kΩ/mm with a consistency of ±10%. Furthermore, the average transmittance of the ITO films with regular LIPSSs in the range of 1200–2000 nm was improved from 21% to 60%. The regular LIPSS is promising for transparent electrodes of nano-optoelectronic devices—particularly in the near-infrared band.

Due to their unusual features in condensed matter physics and their applicability in optical and optoelectronic applications, three-dimensional Dirac semimetals (3D DSMs) have garnered substantial interest in recent years. In contrast to monolayer graphene, 3D DSM exhibits linear band dispersion despite its macroscopic thickness. Therefore, being a bulk material, it is easy to make nanostructures with 3D DSM, just as one normally does with metals such as gold and silver. Among 3D DSMs, cadmium arsenide (Cd₃As₂) is quite famous and considered an excellent 3D DSM due to its chemical stability in air and extraordinary optical response. In this review, advances in 3D DSM Cd₃As₂ fabrication techniques and recent progress in the photonics of 3D DSM Cd₃As₂ are given and briefly reviewed. Various photonic features, including linear and nonlinear plasmonics, optical absorption, optical harmonic generation, and ultrafast dynamics, have been explored in detail. It is expected that Cd₃As₂ would share an excellent tunable photonic response like graphene. We envision that this article may serve as a concise overview of the recent progress of photonics in 3D DSM Cd₃As₂ and provides a compact reference for young researchers.