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Polarization sensitive and wavelength dependent photothermal and scattering images of an NP ring. Photothermal images of the same ring as shown in Fig. 1A excited with horizontal (first column) and vertical (second column) polarizations, and scattering images detected with horizontal (third column) and vertical (forth column) polarizations. The excitation and detection wavelengths for absorption and scattering are displayed next to the corresponding images.
