Refractive index of a single ZnO microwire at high temperatures

Refractive index of a single ZnO microwire at high temperatures
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单根 ZnO 微丝在高温下的折射率

DOI:
10.1063/1.4866668
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发表时间:
2014-02
影响因子:
4
通讯作者:
Xiulai Xu
Xiulai Xu
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Yue Sun;Dongxiang Zhang;Baohua Feng;Xiulai Xu

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我们报告了使用光腔模式在室温至约 400 K 温度范围内纤锌矿 ZnO 单晶微线折射率的研究。使用共焦微光致发光装置测量了不同温度下 ZnO 微丝的光致发光 (PL) 光谱。随着温度升高,PL 光谱中观察到的回音壁模式在紫外和可见光范围内都显示出红移。红移用于提取 ZnO 微线的折射率。推导了不同温度下的色散关系,结果表明,横电模式和横磁模式的折射率均随温度升高而增大。波长越短,折射率增加得越快,这是因为根据洛伦兹振荡器模型,较短的波长更接近ZnO微线的谐振频率。
We report a study of refractive index of a wurtzite ZnO single crystal microwire at a temperature range from room temperature to about 400 K using optical cavity modes. The photoluminescence (PL) spectra of the ZnO microwire at different temperatures were performed using a confocal micro-photoluminescence setup. The whispering gallery modes observed in the PL spectra show a redshift both in the ultraviolet and the visible range as the temperature rises. The redshift is used to extract the refractive index of the ZnO microwire. The dispersion relations are deduced at different temperatures, and the results show that the refractive index increases with raising temperature for both transverse electric and transverse magnetic modes. The refractive index increases faster at a shorter wavelength, which is due to the fact that the shorter wavelength is closer to the resonance frequencies of ZnO microwire according to the Lorentz oscillator model.
DOI: 10.1007/s10946-012-9266-y
发表时间: 2012-06
影响因子: 0.9
作者:
V. Markushev;M. Ryzhkov;Ch. M. Briskina-;A. A. Borodkin-A.;S. Rumyantsev;W. Shen;D. H. Xu;V. L. Lyaskovskii-
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发表时间: 1992-01-20
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期刊: Optics letters
影响因子: 3.6
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影响因子: 3.6
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