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Principle of a PC-TIR sensor. (a), A sample sandwiched by two pieces of PC structures. We conceptually split this structure from the middle layer into two pieces. (b), Use only one piece of the PC structure in a TIR geometry. Owing to the TIR, conceptually an imaginary PC structure exists and forms a microcavity as if there would be two pieces of PC structures.(c),This PC-TIR sensor offers a unique sensing interface open for biomolecular assay.
