Nano-infrared imaging of localized plasmons in graphene nano-resonators

Duan Jiahua^{1, 2}, Chen Runkun^{1, 2}, Chen Jianing^{1, 2, 3, †}

(color online) The cavity mode and localized-dipole mode of graphene plasmons with different incident frequencies. (a)–(d) The near-field amplitude of graphene plasmons with incident frequency of 901 cm⁻¹, 930 cm⁻¹, 950 cm⁻¹, 980 cm⁻¹, respectively. Here, mode 1 and mode 2 represent cavity and dipole mode, respectively. The scale bar is 200 nm.