Fig. 7: Quantification of monolayer graphene thickness using the HSPRM system.
From: Flexible hyperspectral surface plasmon resonance microscopy
a Spectral SPR image of the monolayer graphene covered SPR chip. b RW image extracted from the measured hyperspectral datacube. c Reconstructed 2D thickness distribution of the monolayer graphene. The arrow line indicates the path to analyze the thickness fluctuation. d Thickness fluctuation along the arrow line in Fig. 7c. e Statistical distribution of thicknesses at about 120,000 pixels in the graphene-covered area in Fig. 7c. f Optical microscope image of the same graphene sample. The similar results were obtained with two samples.
