Asymmetrical plasmon reflections in tapered graphene ribbons with wrinkle edges

Yang Cui^{1, 2}, Chen Runkun^{1, 2}, Jia Yuping^{1, 2, 4}, Guo Liwei^{1, 2, †}, Chen Jianing^{1, 2, 3, ‡}

(color online) Simulated near-field optical profiles at graphene wrinkles. (a) Schematic of graphene wrinkles on flat graphene. (b) Near-field optical signal profiles of graphene wrinkles with different optical conductivities at a wrinkle position. Wrinkles with increased or decreased optical conductivity give different line shapes. (c) Signal difference between the maximum peak value of the interference fringe and the flat graphene with different optical conductivities.