2004/05/14 by A. M. Ignatov, Andre Ignatov, Ignatov, A. M. +2
Engineering · Physics and Astronomy · #Classical Physics (physics.class-ph) #FOS: Physical sciences #Near-Field Optical Microscopy #Optics (physics.optics) #Photonic and Optical Devices #physics.class-ph #physics.optics
paper · pdf · doi:10.48550/arxiv.physics/0405069
4 pages, 7 figures
openalex publication_date 2004/05/14 · arxiv created 2004/11/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We investigate the critical points of the near field intensity. It is shown that there are no local maxima of the intensity outside dielectric surfaces and the only possible critical points are either local minima or saddle points. Using the boundary charge method we investigate numerically the field distribution around star-like sets of prolate spheroids. The field enhancement is shown to achieve a value of several hundreds at critical points outside the surfaces of spheroids and of several thousands near the surfaces.