Polarization contrast in fluorescence scanning near-field optical microscopy in reflection

A. Jalocha, N.F. van Hulst

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Abstract

Polarization contrast is presented in fluorescence images of a Langmuir-Blodgett monolayer obtained with a scanning near-field optical microscope operated in reflection. A tapered optical fiber is used both to excite and to collect the fluorescence. The lateral resolution in the reflection fluorescence image is estimated at 200 nm. Shear-force detection controls the tip-to- surface distance and simultaneously gives a topographic map. Direct correlation between topography and the fluorescent domain is thus obtained. We show that the fluorescence is polarized along the molecular orientation in the Langmuir- Blodgett monolayer. Thus we demonstrate the study of the polarization direction in the reflection mode.
Original languageEnglish
Pages (from-to)1577-1580
Number of pages4
JournalJournal of the Optical Society of America. B: Optical physics
Volume12
Issue number9
DOIs
Publication statusPublished - 1995

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