Fabrication of nanostructure grating polymer based coupling element for Surface Plasmon Resonance (SPR) sensors and its spectral reflectance characteristics

Abstract

In this paper, we present nanostructure grating polymer, fabricated by employing the nano-imprint lithography technique, with gold nanolayer on its top surface as a coupling element for SPR sensors. The experiment results showed that the diffracted beams for m = + 1 were suppressed, which indicates the SPR wave excitation in this structure. For further clarification, SPR spectral shape simulation has been also done by using the Rigorous Coupled-Wave Analysis (RCWA) method. The simulation results are in agreement with the observed SPR dips in this experimental work.