Abstract

A macroscopic self-consistent model for external-reflection near-field microscopy together with a similar model for photon scanning tunneling microscopy is used to describe phase conjugation of light that is emitted by a fiber tip placed near a phase-conjugating mirror. The appropriate relations are obtained for a two-dimensional configuration, and numerical results for various trapezium-shaped fiber tips are presented. This modeling accounts for the main features of recent experiments on phase conjugation of optical near fields and emphasizes the significance of taking into consideration field components that are evanescent in air but propagating in the phase-conjugating mirror. The influence of fiber tip parameters on the spatial confinement of phaseconjugated light is discussed.

© 1995 Optical Society of America

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