Abstract
Subwavelength optical imaging can be accomplished by scanning a nanoscale aperture or ananoprobe containing a locally defined nanoscale optical source. Currently, most suchmethods, including various implementations of near-field scanning optical microscopy(NSOM), form near-field images by measuring the intensity of optical signals generated byoptical transmission, scattering or fluorescence. Here we report the development of ananoprobe that can extend NSOM functionalities by focusing on the dynamical aspects oflight emission (such as fluorescence lifetime measurement) and nonlinear optical processes(such as second harmonic generation). Our nanoprobes consist of a silica fiber taper, asingle nanowire or a nanotube, and appropriate functional nano-optical structures. Thefabrication, characterization and potential applications of such nanoprobes are discussed.
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