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- W2327661922 abstract "Dark-field microscopy (DFM) is widely used to optically image and spectroscopically analyze nanoscale objects. In a typical DFM configuration, a sample is illuminated at oblique angles and an objective lens collects light scattered by the sample at a range of lower angles. Here, we develop waveguide scattering microscopy (WSM) as an alternative technique to image and analyze photonic nanostructures. WSM uses an incoherent white-light source coupled to a dielectric slab waveguide to generate an evanescent field that illuminates objects located within several hundred nanometers of the waveguide surface. Using standard microscope slides or coverslips as the waveguide, we demonstrate high-contrast dark-field imaging of nanophotonic and plasmonic structures such as Si nanowires, Au nanorods, and Ag nanoholes. Scattering spectra collected in the WSM configuration show excellent signal-to-noise with minimal background signal compared to conventional DFM. In addition, the polarization of the incident field is controlled by the direction of the propagating wave, providing a straightforward route to excite specific optical modes in anisotropic nanostructures by selecting the appropriate input wavevector. Considering the facile integration of WSM with standard microscopy equipment, we anticipate it will become a versatile tool for characterizing photonic nanostructures." @default.
- W2327661922 created "2016-06-24" @default.
- W2327661922 creator A5006320259 @default.
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- W2327661922 date "2014-07-22" @default.
- W2327661922 modified "2023-09-27" @default.
- W2327661922 title "Waveguide Scattering Microscopy for Dark-Field Imaging and Spectroscopy of Photonic Nanostructures" @default.
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- W2327661922 doi "https://doi.org/10.1021/ph5001617" @default.
- W2327661922 hasPublicationYear "2014" @default.
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