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(a) A schematic diagram of the experimental arrangement. (b) DGWS with a drop of TMR on it.
Transmission spectrum of the DGWS for the TE polarization at an incident angle of 36°.
TPF emission spectra of a thin layer of 100 pM TMR solution deposited onto the DGWS at different excitation wavelengths. Open squares 813 nm; filled squares resonant wavelength 815 nm; open triangles off resonance, 815 nm at TM polarization; open circles 816 nm; and filled triangles 820 nm.
Logarithmic representation of the measured TPF signal vs incident laser power obtained from the DGWS sample as well as from the reference sample. A linear slope of nearly 2 proves the quadratic dependence of TPF signal in both cases. The TPF intensity is enhanced by a factor of 330 due to the DGWS.
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