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Sketch map of our experiment setup. The taper is mounted in an U-shaped configuration and moved by a piezoelectric stage. Scattering light is recorded by a CCD camera after a microscope objective. Zoomed-in region of the taper-nanowire coupling region on the substrate.
Optical microscope images (a) and the coupling efficiencies (b) for different cross angles from 10° to 90° with a 10° changing step. Inset: Far-field emission intensities as a function of laser polarization angle.
Plasmons are observed from both ends by contacting the fiber taper with a nanowire in the midsection. (a) Micrograph of a nanowire contacted with a fiber taper. [(b)–(d)] The fiber taper contacted the nanowire with different sections and scattering light from both ends are detected.
Coupling of light into multiple nanowires from a single optical fiber taper.
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