A. Jalocha et al., MULTI-DETECTION AND POLARIZATION CONTRAST IN SCANNING NEAR-FIELD OPTICAL MICROSCOPY IN REFLECTION, Ultramicroscopy, 61(1-4), 1995, pp. 221-226
We present a scanning near-field optical microscope operating in refle
ction suitable for simultaneous bright field and fluorescence imaging.
A non-coated pulled optical fibre is used in true reflection mode, i.
e. both as emitter and collector. Beam splitters, dichroic mirrors and
polarisers are combined to discriminate the different wavelength and
polarisation signals. The distance between fibre and sample is control
led by shear force feedback. Bright field and fluorescence images with
polarisation contrast of dielectric samples have been obtained with 2
00 nm lateral resolution. We show the fluorescence polarisation depend
ence with the molecular orientation in application to Langmuir-Blodget
t thin film domains.