Mechanism of Near-Field Raman Enhancement in One-Dimensional Systems
نویسندگان
چکیده
منابع مشابه
Mechanism of near-field Raman enhancement in one-dimensional systems.
We develop a theory of near-field Raman enhancement in one-dimensional systems, and report supporting experimental results for carbon nanotubes. The enhancement is established by a laser-irradiated nanoplasmonic structure acting as an optical antenna. The near-field Raman intensity is inversely proportional to the 10th power of the separation between the enhancing structure and the one-dimensio...
متن کاملSurface enhancement in near-field Raman spectroscopy
The intensity and selection rules of Raman spectra change as a metal surface approaches the sample. We study the distance dependence of the new Raman modes with a near-field scanning optical microscope ~NSOM!. The metal-coated NSOM probe provides localized illumination of a metal surface with good distance control. Spectra are measured as the probe approaches the surface, and the changes elucid...
متن کاملNear field enhancement in silver nanoantenna-superlens systems
We demonstrate near field enhancement generation in silver nanoantenna-superlens systems via numerical modeling. Using near-field interference and global optimization algorithms, we can design nanoantenna-superlens systems with mismatched permittivities, whose performance can match those with matched permittivities. The systems studied here may find broad applications in the fields of sensing, ...
متن کاملSpatial coherence in near-field Raman scattering.
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 ∼30 nm for the optical phonons in ...
متن کاملNear-field Raman spectroscopy of nanocarbon materials.
Nanocarbon materials, including sp(2) hybridized two-dimensional graphene and one-dimensional carbon nanotubes, and sp(1) hybridized one-dimensional carbyne, are being considered for the next generation of integrated optoelectronic devices. The strong electron-phonon coupling present in these nanocarbon materials makes Raman spectroscopy an ideal tool to study and characterize the material and ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2009
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.103.186101