Transmission and reflection characteristics of metal-coated optical fiber tip pairs

Abstract

The optical transmission and reflection in between two metalized optical fiber tips is studied in the optical near-field and far-field domains. Besides aluminum-coated tips for near-field scanning optical microscopy (NSOM), specifically developed gold-coated fiber tips cut by focused ion beam (FIB) are investigated. Transverse transmission maps of sub-wavelength width clearly evidence optical near-field coupling between the tips for short tip distances and becomes essentially Gaussian-shaped for larger distances in the far-field regime. Moreover concentric reflection fringes observed for NSOM-type tips illustrate the influence of the receiving fiber tip on the emission pattern of the source tip.

References in corpus (3)

• Diffraction by a small aperture in conical geometry: Application to metal coated tips used in near-field scanning optical microscopy
• The optical near-field of an aperture tip
• Near-field microscopy with a single-photon point-like emitter: Resolution versus the aperture tip?

Cited by in corpus (1)

• Single and dual fiber nano-tip optical tweezers: trapping and analysis