Journal
2D MATERIALS
Volume 10, Issue 1, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/2053-1583/ac988f
Keywords
tip-enhanced Raman spectroscopy; twisted bilayer graphene; graphene edges; excitation field
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TERS experiments reveal the optical field generated by a nanoplasmonic probe. The TERS intensity profile of nano-objects smaller than the probe's apex resembles a donut shape, similar to the field generated by a point-dipole source, and can be well described by the Dyadic Green's function. By having prior knowledge on the excitation field generated by the TERS probe, the width of shear solitons caused by lattice reconstruction in low-angle twisted bilayer graphene, a prominent platform for twistronics, and the extent of defect-induced light emission from graphene edges can be measured.
The optical field generated by a nanoplasmonic probe is revealed in tip-enhanced Raman spectroscopy (TERS) experiments. The TERS intensity profile of nano-objects smaller than the probe's apex has a donut-like shape which resembles the magnitude of the field generated by a point-dipole source, being well described by the Dyadic Green's function. Having prior knowledge on the excitation field generated by the TERS probe, we measured the width of shear solitons caused by lattice reconstruction in low-angle twisted bilayer graphene, a prominent platform for twistronics, and the extend of defect-induced light emission from graphene edges.
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