近场光学显微镜对介质球的最佳分辨研究

Existence of the best resolution of near-field optical microscope for dielectric spherical nanometric particles

利用麦克斯韦电磁场理论和偶极近似方法,导出了光场与介质球的相互作用常数,证明了近场光学显微镜对介质仍然存在最佳分辨,最佳分辨效果出现在近场与远场相消的位置。

From Maxwell's electromagnetic theory, dipole approximation method is used to deduce the coupling constant between the optical field and dielectric nanometric spherical particles. It is found that the best resolution still exists in the near-field optical microscope for these dielectric particles and happens at the position where the far field counteracts the near field.