We have studied the optical properties of a novel quantum dot-microcavity system consisting of CdTe nanocrystals attached to a melamine formaldehyde latex microsphere. The spheres were studied using conventional and confocal microscopy, the confocal system revealed defects in some spheres. The coupling between the emission of the nanocrystals and the spherical cavity modes was realized. Periodic very narrow peaks of the emission spectra corresponding to the whispering gallery modes were detected with strong emission into selected modes at a high pump intensity.

No abstract

We present a programmable array microscope that uses a ferroelectric liquid-crystal spatial light modulator (SLM) for dynamic generation of scanning apertures. A single SLM serves as both the source and the detector aperture array in a double-pass confocal system. Successive aperture frames scan the array across the viewing area for complete imaging of a sample while preserving depth discrimination. Integration of the microscope output across all aperture frames produces a confocal image.

No abstract

Electronbeaminduced current near the localized defects in a polycrystalline semiconductor Erratum: On the theory of electronbeaminduced current contrast from pointlike defects in semiconductors [J.We present a model of image formation in scanning optical microscopes operating in the optical beam induced current mode. A perturbation analysis is used, a point spread function is introduced, and specific images of point defects obtained. It is found that the resolution is not limited by the diffusion length.