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Gold (Au) is so far the most commonly used plasmonic metal in nanohole-array-based surface plasmon resonance biosensors, due to its excellent plasmonic properties in visible light range and chemical inertness in solutions. However, Au intrinsically absorbs blue-green light heavily, leading to poor plasmonic excitation efficiency below 600 nm. This work explores the possibilities of using various kinds...
We theoretically and experimentally investigate the influence of the incident angle of illumination on the fluorescence enhancement for two kinds of gold nanohole arrays – a gold nanohole array on glass substrate (Au-hole array), and a gold coated photoresist nanohole array (Au/PR-hole array). Our simulations show that the absorption spectra for the Au/PR-hole array vary substantially with angle of...
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