(MOV 2 MB) Additional file 2: Leakage radiation images of SPP waves. Leakage radiation images of SPP waves when the incident wavelength was scanned from red to blue wavelength. (MOV 4 MB) References 1. Steinberger B, Hohenau A, Ditlbacher H, Stepanov AL, Drezet A, Aussenegg FR, Leitner

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