Abstract
Polarization resolved μ -Raman spectroscopy was carried out at the edges of bilayer graphene. We find strong dependence of the intensity of the G band on the incident laser polarization, with its intensity dependence being 90° out of phase for the armchair and zigzag case, in accordance with theoretical predictions. For the case of mixed-state edges we demonstrate that the polarization contrast reflects the fractional composition of armchair and zigzag edges, providing a monitor of edge purity, which is an important parameter for the development of efficient nanoelectronic devices.
Original language | English |
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Article number | 031908 |
Journal | Applied Physics Letters |
Volume | 97 |
Issue number | 3 |
DOIs | |
State | Published - 19 Jul 2010 |