Author Affiliations
Abstract
1 School of Instrument Science and Opto-Electronics Engineering, Beihang University, Beijing 100191, China
2 International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191, China
A novel slotted optical microdisk resonator, which significantly enhances light–matter interaction and provides a promising approach for increasing the sensitivity of sensors, is theoretically and numerically investigated. In this slotted resonator, the mode splitting is generated due to reflection of the slot. Remarkably, effects of the slot width and angular position on the mode splitting are mainly studied. The results reveal that the mode splitting is a second function of the slot width, and the maximum mode splitting induced by the slot deformation is achieved with 2.7853×109 Hz/nm. Therefore, the slotted resonator is an excellent candidate for pressure and force sensing. Besides, the influence of the slot angular position on the mode splitting is a cosine curve with the highest sensitivity of 1.23×1011 Hz/deg ; thus, the optical characteristic demonstrates that the slotted resonator can be used for inertial measurements.
Resonators Optical devices Fiber optics components Fiber optics Fiber optics and optical communications Photonics Research
2017, 5(3): 03000194
1 山东科技大学理学院山东省太赫兹技术重点实验室青岛市太赫兹技术重点实验室, 山东 青岛 266590
2 天津大学精密仪器与光电子工程学院激光与光电子研究所光电信息技术教育部重点实验室, 天津 300072
理论分析了双光子和三光子吸收对非线性材料差频产生太赫兹(THz)波的影响，在不同抽运功率下，计算了相位失配情况下晶体的最佳作用长度和THz 的最大量子转化效率，并将其与相位匹配情况进行对比。研究结果表明，抽运功率不太高时，多光子吸收对差频产生THz 波影响不大；随着抽运功率的提高，多光子吸收的影响变得显著；抽运功率较高时，相位匹配与相位失配情况下，双光子和三光子吸收效应都增加了晶体的最佳作用长度，降低了THz 的最大转化效率。研究了降低多光子吸收的方法。
非线性光学 太赫兹 差频 双光子吸收 三光子吸收 激光与光电子学进展
2014, 51(3): 031901
