Nd<sup>3+</sup>掺杂硫系玻璃微球荧光腔量子电动力学增强效应

李超然; 吴越豪; 戴世勋; 路来伟; 吕社钦; 沈祥; 张培晴; 许银生

doi:doi:10.3788/aos201434.0223001

光学学报, 2014, 34 (2): 0223001, 网络出版: 2014-01-23

Nd³⁺掺杂硫系玻璃微球荧光腔量子电动力学增强效应

Cavity Quantum Electrodynamic Fluorescence Enhancement Effect of Nd³⁺-Doped Chalcogenide Glass Microspheres

论文大纲

李超然 ^*吴越豪戴世勋路来伟吕社钦沈祥张培晴许银生

作者单位

宁波大学高等技术研究院红外材料与器件实验室, 浙江宁波 315211

摘要

采用粉料漂浮高温熔融法自制Nd3+掺杂硫系玻璃微球，研究了腔量子电动力学增强效应对稀土掺杂硫系玻璃微球荧光光谱的影响。把直径90.53 μm的硫系玻璃微球与锥腰直径1.02 μm的石英光纤锥耦合，将808 nm抽运激光导入微球，荧光光谱存在分立的共振峰。根据米氏散射理论公式，计算得到TE偏振态下基模的三个共振峰位置，确定了这三个共振峰的模式序数。增强因子η≈1122，这表明微球荧光自发辐射速率增强幅度为1122倍。在基模条件下对原增强因子公式进行近似化简，并利用近似公式进行估算得到η≈1167，误差为4%。

Abstract

Homemade Nd3+ doped chalcogenide glass microspheres are fabricated using the method of melting floating glass powder at high temperature. It is reported that the fluorescence spectra of chalcogenide glass microsphere are modified by the cavity quantum electrodynamic enhancement effect. A 90.53-μm diameter chalcogenide glass microsphere is coupled with the silica fiber-taper that has a cross-sectional diameter of 1.02 μm. An 808-nm laser is used as a pumping source for the microsphere cavity and separate resonance peaks found in the microsphere fluorescence spectra. According to the Mie scattering theory, positions and mode ordinals of three resonance peaks for the fundamental TE mode are calculated. Based on the formula for calculating the cavity quantum electrodynamic enhancement factor, it is found that the enhancement factor η of our chalcogenide glass microsphere is 1122, which indicates that spontaneous fluorescence emission rate is enhanced by 1122 times. By simplifying the enhancement factor formula for the fundamental TE mode, it is found that the enhancement factor estimated is 1167, which indicates an error rate of 4%.

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李超然, 吴越豪, 戴世勋, 路来伟, 吕社钦, 沈祥, 张培晴, 许银生. Nd³⁺掺杂硫系玻璃微球荧光腔量子电动力学增强效应[J]. 光学学报, 2014, 34(2): 0223001. Li Chaoran, Wu Yuehao, Dai Shixun, Lu Laiwei, Lü Sheqin, Shen Xiang, Zhang Peiqing, Xu Yinsheng. Cavity Quantum Electrodynamic Fluorescence Enhancement Effect of Nd³⁺-Doped Chalcogenide Glass Microspheres[J]. Acta Optica Sinica, 2014, 34(2): 0223001.

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