表面曲率对石英毛细管微瓶模式及传感特性影响

张峰; 吴根柱; 汪成程

doi:doi:10.7510/jgjs.issn.1001-3806.2018.06.021

激光技术, 2018, 42 (6): 840, 网络出版: 2018-12-25

表面曲率对石英毛细管微瓶模式及传感特性影响

Influence of surface curvature on mode and sensing characteristics of quartz capillary microbottles

论文大纲

张峰 ¹吴根柱 ^1,2,*汪成程 ¹

作者单位

¹ 浙江师范大学数理与信息工程学院, 金华 321004

² 浙江师范大学行知学院, 金华 321004

摘要

为了实现高Q值低模式体积的最佳传感特性微瓶设计, 采用有限元数值分析方法研究了石英毛细管微瓶回音壁模式特性及其折射率传感性能,计算分析了当膨胀半径和赤道面处壁厚为定值时, 不同表面曲率对空芯和液芯微瓶回音壁模式特性的影响, 包括品质因子、核芯能量百分比等, 并探讨了在折射率传感应用中谐振波长随表面曲率变化规律。结果表明, 切向二阶模受曲率影响更为明显, 内壁曲率平方Δk22=0.008时Q值高达108, 内壁表面曲率越小, 核芯百分比所占能量越大, 且在内壁表面曲率较小时可实现高灵敏度折射率传感。该研究对进一步高Q值微泡的实验研制及应用于传感领域提供了有效依据, 具有一定的理论参考价值。

Abstract

In order to design micro-bottles with best sensing characteristics, such as high Q value and low mode volume, mode characteristics and refractive index sensing characteristics of quartz capillary micro-bottles were studied by means of finite element numerical analysis. The influence of different surface curvatures on mode characteristics of echo wall of hollow core and liquid core micro-bottles, including quality factor and percentage of core energy, was calculated and analyzed. The variation of resonance wave length with surface curvature in refractive index sensing application was also discussed. The results show that the 2nd tangential order mode is more affected by curvature of inner wall. Q value is up to 108 when curvature square of inner wall Δk22=0.008. The smaller the inner wall surface curvature is, the greater the energy of core percentage is. High sensitivity refractive index can be realized by the smaller curvature of inner wall. This study provides an effective basis for further development and application of high Q value microbottles in sensing field. It has certain theoretical reference value.

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张峰, 吴根柱, 汪成程. 表面曲率对石英毛细管微瓶模式及传感特性影响[J]. 激光技术, 2018, 42(6): 840. ZHANG Feng, WU Genzhu, WANG Chengcheng. Influence of surface curvature on mode and sensing characteristics of quartz capillary microbottles[J]. Laser Technology, 2018, 42(6): 840.

表面曲率对石英毛细管微瓶模式及传感特性影响

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