منابع مشابه
Raman Spectrum of silicon nanowires
We measure the effects of phonon confinement on the Raman spectra of silicon nanowires (SiNWs). We show how previous reports of phonon confinement in SiNWs and nanostructures are actually inconsistent with phonon confinement, but are due to the intense local heating caused by the laser power used for Raman measurements. This is peculiar to nanostructures, and would require orders of magnitude h...
متن کاملHyper-Rayleigh scattering spectrum of liquid nitromethane.
The vertical vertical (VV), horizontal vertical (HV), and vertical horizontal (VH) hyper-Rayleigh scattering (HRS) spectra were measured for liquid CH3NO2 at T= 300 K. The main HRS spectral component has a width upsilon1=1.28 +/- 0.04 cm(-1), which gives an orientation relaxation time pi=4.1 +/- 0.1 ps in good agreement with other experiments. However, the VH spectrum also contains a previously...
متن کاملCombination of surface enhanced Raman and hyper-Raman imaging using hyperspectral analysis
Combination of surface enhanced Raman scattering (SERS) with its two-photon analogue, surface enhanced hyper-Raman scattering (SEHRS), provides complementary structural and chemical information due to the different corresponding selection rules. Depending on the molecular symmetry, SEHRS may probe IR active modes or additional “silent” modes, which are seen neither in Raman nor in IR spectra [1...
متن کاملSurface-Enhanced Raman and Surface-Enhanced Hyper-Raman Scattering of Thiol-Functionalized Carotene
A thiol-modified carotene, 7'-apo-7'-(4-mercaptomethylphenyl)-β-carotene, was used to obtain nonresonant surface-enhanced Raman scattering (SERS) spectra of carotene at an excitation wavelength of 1064 nm, which were compared with resonant SERS spectra at an excitation wavelength of 532 nm. These spectra and surface-enhanced hyper-Raman scattering (SEHRS) spectra of the functionalized carotene ...
متن کاملSuperresolution vibrational imaging by simultaneous detection of Raman and hyper-Raman scattering.
We have developed a superresolution vibrational imaging method by simultaneous detection of Raman and hyper-Raman scattering. Raman and hyper-Raman images obtained with the same laser spot carry independent information on the sample spatial distribution, owing to different signal dependence (linear in Raman and quadratic in hyper-Raman) on the incident light intensity. This information can be q...
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ژورنال
عنوان ژورنال: Chemistry Letters
سال: 1979
ISSN: 0366-7022,1348-0715
DOI: 10.1246/cl.1979.433