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10 papers
Anomalous Tip-Sample Distance Behavior on the Tip-Enhanced Raman Spectroscopy of Graphene in Ambient Conditions
André G. Pereira, Raul Corrêa, Bianca Carneiro +5
Tip-Enhanced Raman Spectroscopy (TERS) combines Raman spectroscopy with scanning probe microscopy to overcome the spatial resolution limitation imposed by light diffraction, offeri…
Plasmonic Bi-Cavity Nanostructure for Efficient Light Collection and Localization
Vitor Monken, Raul Correa, Hudson Miranda +5
Tip-enhanced Raman spectroscopy (TERS) typically relies on high-NA excitation to generate a strong axial field at the tip apex, which shortens the working distance and constrains s…
Impact of Substrate on Tip-enhanced Raman Spectroscopy --- A Comparison of Frequency Domain Simulations and Graphene Measurements
Hudson Miranda, Cassiano Rabelo, Luiz Gustavo Cancado +7
Tip-enhanced Raman spectroscopy (TERS) has reached nanometer spatial resolution for measurements performed at ambient conditions and sub-nanometer resolution at ultra high vacuum.…
Group theory for structural analysis and lattice vibrations in phosphorene systems
J. Ribeiro-Soares, R. M. Almeida, L. G. Cançado +2
Group theory analysis for two-dimensional elemental systems related to phosphorene is presented, including (i) graphene, silicene, germanene and stanene, (ii) dependence on the num…
Group Theory analysis of phonons in two-dimensional Transition Metal Dichalcogenides
J. Ribeiro-Soares, R. M. Almeida, E. B. Barros +4
Transition metal dichalcogenides (TMDCs) have emerged as a new two dimensional materials field since the monolayer and few-layer limits show different properties when compared to e…
Theory of spatial coherence in near-field Raman scattering
Luiz Gustavo Cançado, Ryan Beams, Ado Jorio +1
A theoretical study describing the coherence properties of near-field Raman scattering in two- and one-dimensional systems is presented. The model is applied to the Raman modes of…