Identification of dispersion-dependent hexagonal cavity modes of an individual ZnO nanonail
Liu, Jinzhang, Lee, Soonil, Ahn, YeongHwan, Park, Ji-Yong, Koh, Ken Ha, & Park, Kyung Ho (2008) Identification of dispersion-dependent hexagonal cavity modes of an individual ZnO nanonail. Applied Physics Letters, 92(26), pp. 263102-1.
The hexagonal resonator characteristics of an individual ZnO-nanonail’s head were investigated via spatially resolved cathodoluminescence (CL) at room temperature. The positions of most of distinct CL peaks in visible range were well matched to those of whispering gallery modes (WGMs) of a hexagonal dielectric cavity when we took birefringence and dispersion of refractive indices into account. The broad and weak peaks for TE polarization in long wavelength range were consistent with refractive-index values below the threshold for total internal inflection. CL peaks that were not matched to WGMs were identified as either triangular quasi-WGM or Fabry–Pérot resonance modes.
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