Characterization of near-field optical probes

Brian Vohnsen, Sergey I. Bozhevolnyi

    Research output: Contribution to journalJournal articleResearchpeer-review


    Radiation and collection characteristics of four different near-field optical-fiber probes, namely, three uncoated probes and an aluminium-coated small-aperture probe, are investigated and compared. Their radiation properties are characterized by observation of light-induced topography changes in a photo-sensitive film illuminated with the probes, and it is confirmed that the radiated optical field is unambigiously confined only for the coated probe. Near-field optical imaging of a standing evanescent-wave pattern is used to compare the detection characteristics of the probes, and it is concluded that, for the imaging of optical-field intensity distributions containing predominantly evanescent-wave components, a sharp uncoated tip is the probe of choice. Complementary results obtained with optical phase-conjugation experiments with he uncoated probes are discussed in relation to the probe characterization.
    Original languageEnglish
    JournalApplied Optics
    Issue number9
    Pages (from-to)1792-1797
    Publication statusPublished - 1999

    Cite this