In this paper, a patch-antenna-array enhanced quantum cascade detector with freely switchable operating modes among mid-wave, long-wave, and dual-color was proposed and discussed. The dual-color absorption occurs in a single active region through an optimized coupled miniband diagonal-transition subbands arrangement, and a successful separation of the operation regimes was realized by two nested antenna arrays with different patch sizes up to room temperature. At 77 K, the 5.7-μm channel achieved a peak responsivity of 34.6 mA/W and exhibited a detectivity of 2.0×1010 Jones, while the 10.0-μm channel achieved a peak responsivity of 87.5 mA/W, giving a detectivity of 5.0×1010 Jones. Under a polarization modulation of the incident light, the minimum cross talk of the mid-wave and the long-wave operating modes was 1:22.5 and 1:7.6, respectively. This demonstration opens a new prospect for multicolor infrared imaging chip integration technology.

Sharing the advantages of high optical power, high efficiency and design flexibility in a compact size, quantum cascade lasers (QCLs) are excellent mid-to-far infrared laser sources for gas sensing, infrared spectroscopic, medical diagnosis, and defense applications. Metalorganic chemical vapor deposition (MOCVD) is an important technology for growing high quality semiconductor materials, and has achieved great success in the semiconductor industry due to its advantages of high efficiency, short maintenance cycles, and high stability and repeatability. The utilization of MOCVD for the growth of QCL materials holds a significant meaning for promoting the large batch production and industrial application of QCL devices. This review summarizes the recent progress of QCLs grown by MOCVD. Material quality and the structure design together determine the device performance. Research progress on the performance improvement of MOCVD-grown QCLs based on the optimization of material quality and active region structure are mainly reviewed.

紫外光通信在激光雷达、战术通信、航空航天内部安全通讯和片上集成通信等领域有着重要应用前景。传统的紫外光通信LED光源的调制带宽窄、输出光功率低和制造工艺复杂等缺点限制了它在长距离、高速率通信和片上集成通信领域的广泛应用。实验表明，增加单个器件发光面积可提升光输出功率，但增加的器件电容对带宽提升是不利的，因此紫外光通信LED未来的重要研究方向是提升并优化带宽的同时增加器件的光功率密度。UVC Micro?LED器件有着光提取效率高、时间常数小、载流子寿命短、调制速率快及工作电流密度高等出色性能，因此在通讯领域受到科研界和工业界的广泛青睐。本文总结了紫外LED、特别是UVC Micro?LED的相关研究进展，并重点介绍了它们在光通信及其片上集成互联方面的应用。研究发现，对UVC Micro?LED及其阵列制备与性能提升加强研究，是未来提升自由空间和片上互联紫外通信系统性能的最佳解决方案之一。

点面复合红外诱饵是国内外飞机平台使用的先进红外干扰装备之一，具备较好的对抗红外制导导弹的能力。为获得点面复合红外诱饵空中动态散布特性，为其使用提供理论基础，提升点面复合红外诱饵使用效能，对点面复合红外诱饵的点源诱饵和面源诱饵进行动力学和运动学分析，联立方程组并进行求解，获得了点源诱饵空中运动轨迹和面源诱饵在空中的散布情况，然后改变飞机平台速度进行仿真，获得了点源诱饵和面源诱饵的相对运动趋势和平台速度影响规律。基于点面复合红外诱饵空中动态散布特性仿真，开展使用研究，阐述了点面复合红外诱饵的干扰特性和干扰机理，干扰特性主要包括辐射强度值、辐射强度变化率和辐射面积，分析了点面复合红外诱饵在红外制导导弹导引头视场的形成特点，并基于此开展干扰机理研究，分析了点面复合红外诱饵在红外制导导弹的成像阶段和非成像阶段的干扰机理，能够为诱饵使用策略的制定提供参考和借鉴，提升飞机平台战场生存能力。

在p?AlGaN表面沉积Ni/Au/Ni/Au透明电极体系，通过传输线模型测试，研究了退火温度对Ni/Au/Ni/Au与p?AlGaN材料接触特性的影响。结果表明，AlGaN基深紫外LED采用Ni/Au/Ni/Au金属体系，在600 ℃空气氛围下退火3 min形成p型半导体材料NiO。进一步优化Ni/Au/Ni/Au体系金属厚度，当Ni/Au/Ni/Au各层厚度由20/20/20/20 nm减薄至2/2/5/5 nm，并在600 ℃空气氛围退火3 min，其与p?AlGaN材料的接触电阻率从3.23×10^-1 Ω·cm²降到2.58×10^-4 Ω·cm²。采用上述优化的Ni/Au/Ni/Au体系制备的深紫外LED器件，器件光电特性得到了改善。在150 mA驱动下工作电压低至5.8 V；通过提升电极透过率，光输出功率提升18.9%。

微透镜阵列在光束匀化、波前测量、集成成像等领域有广泛应用。设计了一种基于光学胶膜(Optically Clear Adhesive, OCA)的液体可变焦微透镜阵列。采用矩形排列的硅微孔阵列控制单个透镜的孔径和排布，并以OCA光学胶膜和去离子水作为微透镜阵列的塑形材料。通过调整微流体腔内液体注入的体积实现对透镜焦距从1.46~10.44 mm的调整。依据聚焦与成像实验证实了微透镜阵列具有良好的均匀性。最后，将该微透镜阵列应用于激光光束匀化整形，通过一对微透镜阵列实现了光束匀化整形。进一步通过固定一对微透镜阵列的间距实现匀化光斑尺寸在7.2~8.4 mm内可调，为匀化光斑尺寸可调提供了新思路。