TY - JOUR
T1 - Spatial coherence in near-field Raman scattering
AU - Beams, Ryan
AU - Cançado, Luiz Gustavo
AU - Oh, Sang Hyun
AU - Jorio, Ado
AU - Novotny, Lukas
N1 - Publisher Copyright:
© 2014 American Physical Society.
PY - 2014/10/28
Y1 - 2014/10/28
N2 - Inelastic light scattering in crystals has historically been treated as a spatially incoherent process, giving rise to incoherent optical radiation. Here we demonstrate that Raman scattering can be spatially coherent, in which case it depends on the dimensionality and symmetry of the scatterer. Using near-field spectroscopy, we measure a correlation length of ∼30nm for the optical phonons in graphene, the results varying with vibrational symmetries and spatial confinement of the phonons.
AB - Inelastic light scattering in crystals has historically been treated as a spatially incoherent process, giving rise to incoherent optical radiation. Here we demonstrate that Raman scattering can be spatially coherent, in which case it depends on the dimensionality and symmetry of the scatterer. Using near-field spectroscopy, we measure a correlation length of ∼30nm for the optical phonons in graphene, the results varying with vibrational symmetries and spatial confinement of the phonons.
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U2 - 10.1103/PhysRevLett.113.186101
DO - 10.1103/PhysRevLett.113.186101
M3 - Article
AN - SCOPUS:84908409217
SN - 0031-9007
VL - 113
JO - Physical review letters
JF - Physical review letters
IS - 18
M1 - 186101
ER -