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(a) The N-Layer model for surface plasmon resonance (SPR) biosensor: prism|Au (50 nm)|graphene (L× 0.34 nm)|sensing medium, and (b) simulated transmittance of light at λo = 633 nm (crosses) and measured transmittance of white light (squares) as a function of the number of graphene layers. Reprinted with permission from [79]. Copyright 2010 The Optical Society.
