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Whispering gallery modes in single triangular ZnO nanorods

机译:单三角形ZnO纳米棒中的耳语画廊模式

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Whispering gallery modes in ZnO nanorods with equilateral triangular cross sections were studied for the first time, to our knowledge. Photoluminescence following excitation with 325 nm radiation was observed at discrete wavelengths and thereby indicated the excitation of whispering gallery modes of triangular ZnO nanorod resonators. These resonances extended over both the visible emission band and the ultraviolet emission band of ZnO. The refractive index of ZnO between 2 eV and 3.2 eV was calculated assuming a "folded" whispering gallery mode and a simple plane-wave model. Our analysis shows that the plane-wave model produces a dispersion curve that agrees well with that of bulk ZnO for large nanorods but shows small deviations when the size of the nanorod resonator approaches the wavelength of the emitted light.
机译:据我们所知,首次研究了具有等边三角形横截面的ZnO纳米棒中的回音壁模式。在离散波长下观察到了在325 nm辐射激发后的光致发光,从而表明了三角形ZnO纳米棒谐振器的回音壁模式的激发。这些共振在ZnO的可见光发射带和紫外光发射带上都延伸。假设“折叠”耳语画廊模式和简单的平面波模型,计算出ZnO在2 eV和3.2 eV之间的折射率。我们的分析表明,对于大型纳米棒,平面波模型产生的色散曲线与整体ZnO的色散曲线非常吻合,但是当纳米棒谐振器的尺寸接近发射光的波长时,其色散曲线显示出较小的偏差。

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