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) Simulation results of wrinkled graphene edges. (a) Schematic of wrinkled graphene edges. (b) Near-field optical signal profiles of graphene ribbons with different optical conductivity at wrinkle positions. The left edge side has a fixed signal strength, while the near-field optical profile of the wrinkled edges differs, with varying optical conductivity at graphene wrinkles. (c) Signal difference between the right peak and the left peak of reflection fringes with varying optical conductivity at graphene wrinkles.