The dynamics of water within a nanopool of a reverse micelle is heavily affected by the amphiphilic interface. In this work, the terahertz (THz) spectra of cyclohexane/Igepal/water nonionic reverse micelle mixture are measured by THz time-domain spectroscopy and analyzed with two Debye models and complex permittivity of background with volume ratios. Based on the fitted parameters of bulk and fast water, the molar concentration of all kinds of water molecules and hydration water molecule number per Igepal molecule are calculated. We find that slow hydration water has the highest proportion in water when the radius parameter ω0<10, while bulk water becomes the main component when ω0≥10. The feature radius ratio of nonhydrated and hydrated water to total water nanopool is roughly obtained from 0.39 to 0.85 with increasing ω0.

本文提出了一种基于 CMOS 0.18 μm工艺的改进型高响应度太赫兹探测器线阵，各探测像素单元由高增益片上天线、高耦合度差分自混频功率探测电路和集成电压放大器组成。其中，差分探测电路利用源极差分驱动场效应管的交叉耦合电容，将太赫兹差分信号耦合至场效应管的栅极与源极，增强场效应管沟道内自混频太赫兹信号的强度，实现高响应度。其次，该探测器配备高增益片上环形差分天线与集成电压放大器，可有效放大混频后的信号，进而提高系统信噪比，最终达到增强探测器响应度的目的。探测器1 × 3线阵系统充分利用CMOS工艺多层结构的特点，将电压放大器布置在天线地平面下方，提高了芯片面积的利用率，有效降低了制作成本，整个系统的面积为0.5 mm²。测试结果表明，当场效应管的栅极偏置为0.42 V时，该探测系统对0.3 THz辐射信号的电压响应度（Rv）最大可达到43.8 kV/W，对应的最小噪声等效功率（NEP）为20.5 pW/Hz^1/2。动态测试结果显示该探测器可对不同材质的隔挡物进行区分。

太赫兹天线是未来第六代移动通信（6G）的重要组成部分，其中太赫兹透镜天线因其高增益、稳定的辐射特性、低成本等优点，受到广泛关注。太赫兹透镜天线不存在馈源遮挡的问题，能够实现多种波束控制功能，其聚焦功能可应用于成像系统，也可在测试装置中起波束准直的作用。太赫兹制作工艺的进步使太赫兹透镜天线的加工精度更高、效果更好，也进一步促进太赫兹透镜天线的发展。本篇综述总结了近五年报道的太赫兹透镜天线，综合其功能、制作工艺、形态、应用场景等特点对它们进行介绍。

氮掺杂金刚石（N-D）是最重要的碳基电子材料之一，由于氮相关色心的存在，其具有许多有趣而独特的物理特征。文章中研究了等离子体化学气相沉积法生长的N-D样品的太赫兹（THz）磁光特性。应用偏振THz时域光谱（THz TDS）技术，在0~8 T磁场和80 K温度条件下，测量了N-D样品在法拉第几何结构下的THz透射光谱，得到了N-D材料的法拉第旋转角和椭偏率、复横向（或霍尔）磁光电导率以及复左、右旋介电常数随磁场的变化规律。结果表明，N-D材料具有优良的THz磁光法拉第旋光效应，可应用于THz旋光器件。

针对太赫兹波段固态大功率应用需求，基于氮化镓功率放大器单片集成电路（Monolithic Microwave Integrated Circuit，MMIC），采用功率合成技术实现了太赫兹波段瓦级功率输出。通过太赫兹波段微带/波导转换结构和键合金丝补偿技术，结合E面T型结二路合成功率分配/合成器，将两片MMIC封装成最大输出功率为160 mW的功率单元模块。在此基础上，采用八路E面合成器设计了频率覆盖180～238 GHz的十六路功率合成放大器。在漏极电压为+10 V时，带内输出功率大于300 mW，189 GHz输出功率达到了1.03 W。

Terahertz (THz) lenses have numerous applications in imaging and communication systems. Currently, the common THz lenses are still based on the traditional design of a circular convex lens. In this work, we present a method for the design of a 3D-printed multilevel THz lens, taking advantage of the benefits offered by 3D printing technology, including compact size, lightweight construction, and cost-effectiveness. The approach utilizes an inverse design methodology, employing optimization methods to promise accurate performance. To reduce simulation time, we employ the finite-difference time-domain method in cylindrical coordinates for near-field computation and couple it with the Rayleigh–Sommerfeld diffraction theory to address far-field calculations. This technology holds great potential for various applications in the field of THz imaging, sensing, and communications, offering a novel approach to the design and development of functional devices operating in the THz frequency range.