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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 thenfirst time, to our knowledge. Photoluminescence following excitation with 325 nm radiation was observed atndiscrete wavelengths and thereby indicated the excitation of whispering gallery modes of triangular ZnOnnanorod resonators. These resonances extended over both the visible emission band and the ultravioletnemission band of ZnO. The refractive index of ZnO between 2eV and 3.2 eV was calculated assuming an“folded” whispering gallery mode and a simple plane-wave model. Our analysis shows that the plane-wavenmodel produces a dispersion curve that agrees well with that of bulk ZnO for large nanorods but shows smallndeviations when the size of the nanorod resonator approaches the wavelength of the emitted light. © 2009nOptical Society of America
机译:据我们所知,这是首次研究了等边三角形横截面的ZnO纳米棒中的回音壁模式。在不连续的波长处观察到用325 nm辐射激发后的光致发光,从而表明激发了三角形ZnOnnanorod谐振器的回音壁模式。这些共振在ZnO的可见光发射带和紫外线发射带上都延伸。假设“折叠”耳语画廊模式和简单的平面波模型,计算出ZnO在2eV和3.2eV之间的折射率。我们的分析表明,平面波模型产生的色散曲线与大型ZnO的散装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,色散曲线显示出较小的偏差。 ©2009n美国光学学会

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