Abstract
We demonstrate a method to maximise the fluorescence enhancement from a dye using gold coated diffraction gratings. Rotations about the azimuth provides a convenient approach to maximise the coupling between the grating and excitation source while achieving enhancements comparable to traditional optical configurations where the grating and in plane light vectors are parallel. This approach yields a 30 fold enhancement in the fluorescence signal over metal free substrates, while opening up the range of possible orientations and configurations suitable for fluorescence enhancement applications.
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