Plasmon reflection reveals local electronic properties of natural graphene wrinkles<xref rid="cpb_28_11_117302fn1" ref-type="fn">*</xref><fn id="cpb_28_11_117302fn1"><label>*</label><p>Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0203500), the National Natural Science Foundation of China (Grant No. 11874407), and Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB 30000000).</p></fn>

Plasmon reflection reveals local electronic properties of natural graphene wrinkles**

Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0203500), the National Natural Science Foundation of China (Grant No. 11874407), and Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB 30000000).

Chen Runkun¹, Yang Cui¹, Jia Yuping^{2, 3}, Guo Liwei^{4, 5, 6, †}, Chen Jianing^{1, 6, ‡}

The dispersion of graphene plasmons on SiC substrate. (a) Topography image of a 1 μm × 1 μm area in Fig. 1(b). (b) The infrared near field imaging of (a) at the frequency of 1025 cm⁻¹. (c) Topography height (upper) and normalized near field amplitude (lower) of the line profiles taken along the white dash lines in (a) and (b). (d) Relationship of graphene plasmons wavelength and incident frequency. The blue curve and black square represent the theoretical result and experimental data, respectively. The scale bar is 200 nm.