一种新的平面回音壁模蓝宝石谐振器模型

基于环状谐振器传输线法(Transmission-line ring resonator)分析建立了单端口和双端口回音壁模平面蓝宝石介质谐振器模型,分别得到了对应的传输公式。并设计制作了一个单端口蓝宝石谐振器,采用新模型可以对原先模型一直无法解释的实验现象作出合理的解释,验证了该模型的有效性。     

毫米波回音壁模介质谐振器

工作于TE、TM或混合模的微波介质谐振器,在毫米波段因尺寸小,Q值低,应用受到很大的限制.本文介绍的回音壁模介质谱振器,在毫米波段谐振器尺寸大,Q值高,且具有抑制寄生模的性能,特别适用于平面混合、单片集成电路.回音壁模介质谐振器在毫米波段将会有重要的应用前景.     

回音壁模介质谐振器

回音壁模介质谐振器是一种特别适合于工作在毫米在波波段的新型介质谐振器，它可用于米波滤波器和振荡器等电路，本文简述了回音壁模介质谐振器的特点和发展，并展望了其应用前景。     

蓝宝石谐振体与其回音壁模

本文采用模匹配方法(mode matching method)计算了单轴各向异性圆柱形介质谐振体的回音壁模频率.对一圆柱形蓝宝石单晶体谐振体的实验测量,验证了该模匹配方法能给出精确的回音壁模频率值.     

极高Q值球形介质谐振器的理论分析

基于球面电磁波的空间截止特性,本文提出了具有极高Q值球形介质谐振器的物理原理和设计思想,文中给出了球形介质谐振器的主要参数的解析表达式和典型的计算实例     

微带型回音壁模介质谐振器带阻方向滤波器

本文报道了使用新型平面回音壁模介质谐振器的微带型毫米波带阻，方向滤波器。全语言用行波环谐振器的方法进行分析，并给出了Ｋａ波段带阻、方向滤波器的实验研究，其结果表明，该谐振器特别适用于毫米波微带集成电路。     

微带型回音壁模介质谐振器带阻方向滤波器

本文报道了使用新型平面回音壁模介质谐振器的微带型毫米波带阻、方向滤波器。全文用行波环谐振器的方法进行分析,并给出了Ka波段带阻、方向滤波器的实验研究,其结果表明,该谐振器特别适用于毫米波微带集成电路。     

一种适用于毫米波段的新型集成平面回音壁模介质谐振器

本文根据回音壁模的特性，讨论了一种适用于毫米波段的新型集成平面回音壁模介质谐振器。采用Ｘ．Ｈ．Ｊｉａｏ（１９８７）的分析思想，导出了特征方程，并进行了详细的理论分析和谐振频率的数值计算，计算结果与有关文献相当吻合。结果表明，该谐振器特别适用于毫米波集成电路。     

光纤微球谐振腔回音壁模式光学特性的研究

从麦克斯韦尔方程出发,分析了介质微球谐振腔支持的回音壁模式(WGM)分布,针对光纤微球谐振腔这种实现回音壁模式的方式,进行了理论研究和通信传输实验系统的搭建,并阐明了优化的方向,仿真结果表明,实现激发回音壁模式的耦合与传统光波导谐振腔通信传输系统相比,光纤微球谐振腔的回音壁模式通信传输系统具有更深刻的物理内涵和应用价值。     

基于回音壁模式的球形光学微腔实验研究

采用聚苯乙烯材料制作出不同直径(50～250μm)的球形光学微腔并实现了微腔与锥形光纤的耦合,测量了球形光学微腔在1570～1576nm波长范围内的吸收光谱,实验结果表明球形光学微腔在这一波长范围内可发生基于回音壁模式(WGM)的光学谐振,且WGM吸收峰的相邻波长间隔随着聚苯乙烯微球直径的增大而减小。通过吸收光谱计算了聚苯乙烯微球在其本征频率下的品质因子,结果表明微球品质因子数量级均在104以上。     

Dynamically Modulated GaN Whispering Gallery Lasing Mode for Strain Sensor

The continuous development of strain sensors offers significant opportunities for improving human–machine interfaces and health monitoring. The dynamically modulated lasing mode is a novel approach to realize a flexible, noncontact, high color‐resolvability, high‐resolution, and ultrasensitive strain sensor. Here, a flexible strain sensor perceiving stress variations is reported via the dynamical regulation of a GaN whispering gallery lasing mode based on the piezoelectric effect. The refraction index of GaN shows a linear relationship with the applied external tensile strain, resulting in a redshift phenomenon of the lasing mode peak at room temperature due to the predominant function of the piezoelectric polarization in the GaN microwire. Compared with a strain sensor relying on the wavelength shift of a photoluminescence (PL) emission peak, the differences and advantages of a sensor based on the strain‐induced lasing mode variation are also investigated and analyzed systematically. This strain sensor may serve as an essential step toward the color mapping of mechanical signals by optical methods, with potential applications in color‐perceived touching sensing, noncontact stress measurement, laser modulation, and optical communication technologies.     

Coupled Whispering Gallery Mode Resonators via Template‐Assisted Assembly of Photoluminescent Microspheres

This study reports a facile method for the assembly of large, array style, coupled dye‐doped microsphere resonators by template‐assisted, in which an aqueous suspension of colloidal microspheres assemble on a patterned template. By exploiting the high resolution of 3D (two‐photon) lithography derived templates, closely packed large arrays, hundreds to thousands of dimers with controlled gap spacing, only limited by the size of the substrate can be achieved. Dye‐doped emissive microspheres with Q‐factors >2.5 × 10² can be achieved and trapped into predetermined cavity positions, thereby controlling the distance between adjacent microspheres. This design allows to scale down dimer spacing from usual 400 nm for traditional photolithography to very small spacing of 50 nm. It is found that exciting individual microspheres in the ensemble shows intense optical cavity modes, whereas closely coupled pairs show controlled mode splitting. Coupling between photoluminescent microspheres is strongly influenced by the gap distance, with strong coupling, equating to normal mode splitting, arising as the gap distance is reduced below traditional sub‐micrometer scale. The coupled dimer assemblies are promising candidates for advancing the development of large‐area coupled nanophotonic structures, beyond the spatial resolution‐limited photolithographical derived arrays.     

作图法求解光学微球腔的本征模

提出一种用作图法求解光学微球腔体本征膜的简便方法。根据光纤耦合时产生的回廊模（WGM）特点，利用对光场做近似处理得出的本征方程，采用Matlab作图求解出本征模。对比实验测得的数据可以看出，相对误差在0．1％以内。与一般的近似公式求解方法相比较，求解的结果更准确，而且计算方法更简便。     

Label‐Free Bioanalysis Based on Low‐Q Whispering Gallery Modes: Rapid Preparation of Microsensors by Means of Layer‐by‐Layer Technology

Low‐Q‐whispering gallery modes (low‐Q‐WGM) can be used for label‐free detection of interactions between biomolecules, measuring their binding and release kinetics or for analysis of changes in the medium in real‐time. The main advantage of the low‐Q‐WGM approach over other label‐free methods is the possibility of measurements in small cavities as the method uses microparticles down to 6 µm as sensors. Commercially available dye‐doped microparticles that are used as low‐Q‐WGM sensors exhibit several drawbacks. Therefore, alternative particle types are developed and optimized as low‐Q‐WGM sensors. First, dye‐doped particles made of different materials are screened. The most critical parameter for WGM performance is the refractive index (RI) of sensor particles. Furthermore, surface roughness of particles, determined by scanning electron microscopy and atomic force microscopy, affects their performance as WGM microsensors. In the second test, fluorescent dyes immobilized on nonfluorescent particles by means of nanometer thick layer‐by‐layer (LbL) films are shown to generate a strong WGM signal. The LbL‐coated particles show remarkably less background fluorescence than dye‐doped particles and are easier to prepare. Finally, this article proposes rapid preparation methods for WGM microparticle sensors based on various parameters such as material type, RI, surface roughness, and number of coated polymer layers.     

用基于WEFD的微扰法计算谐振腔的Q值

对波动方程差分（WEFD）解法进行了研究,给出了电场的计算公式.将它应用于谐振腔Q值的分析,得到了与理论值吻合得很好的结果.     

高次谐波声体波谐振器

简要介绍了高次谐波声体波谐振器的独特优越性和发展概况。用有关高次谐波声体波谐振器的设计理论进行了设计。报道了对高次谐波声体波谐振器的实验研究，给出了超高频和Ｌ波段高Ｑ值高次谐波声体波谐振器的实验结果。