Questions tagged [raman-spectroscopy]
A spectroscopic technique typically used to determine vibrational modes of molecules (or rotational and other low-frequency modes of systems). Commonly used in chemistry to provide a structural fingerprint by which molecules can be identified.
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Can a harmonic oscillator never be Raman active?
Assuming we have some harmonic oscillator
\begin{equation}
H = \omega_0 (a^\dagger a + \frac{1}{2}) = \frac{p^2}{2m} + k x^2
\end{equation}
for which the excitations have even wavefunctions $\Psi_n(x)=...
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Transforming the diamond structure Raman tensor to [111] crystal orientation
I'm writing my physics bachelor on the Raman scattering effect in solids. I'm trying to evaluate the scattering intensity response to varying polarization angle. This is the well known linear ...
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Can Raman spectrometers detect Rayleigh scattering?
Can Raman spectrometets detect Rayleigh scattering?
The sample I have got turned blue after annealing.
And I am wondering if this happened because of Rayleigh scattering. I saw some articles about ...
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450nm peak absorption [closed]
I am looking for an oxide compound (metal oxide, or similar preferably inorganic) which shows light peak absorption at 450 nm. I have troubles in finding the right compound, as most of the oxides have ...
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Real part of Raman response function in linear response theory?
When we calculate the Raman scattering, we usually derive the imaginary part of the Raman response function. The general formula of the imaginary part is given by
\begin{align}
\text{Im}[I(\omega)] \...
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How to remove the baseline in the Raman spectrum without falsifying the spectral data. Measurement of anisotropy using SERS?
My goal is to study the anisotropy of the sample based on changes in the Raman spectrum as a function of angle. The sample was rotated around the Z-axis and changes in the spectra are visible in the ...
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Can Raman scattering (vibrational energy) of a diatomic molecule be described using work instead of potential energy?
From the literature, a diatomic model is often used to describe vibrational energy due to the inelastic scattering of light: two bodies (to represent charges) connected by a massless spring (to ...
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What is the cause of "S-shaped" Raman spectra?
I'm doing Raman on graphite and graphite flouride (GF) obtained from suppliers for comparison with material I'm working on. For graphite, I get spectra which is consistent with literature data.
...
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Raman Spectroscopy of Graphene
Why do graphite and graphene have different peaks in Raman Spectroscopy? Does a double layered graphite give us a graphite peak or a graphite peak?
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Bosonic excitation investigated by scattering experiments in condensed matter physics
Why experimental tools like Raman scattering, Inelastic neutron scattering (INS), Resonant inelastic X-ray scattering (RIXS), etc., can only detect bosonic excitation?
Why electronic excitation won't ...
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Why is Rayleigh scattering so much more likely than Stokes scattering?
In Raman spectroscopy you have to deal with Rayleigh scattering and (Anti-)Stokes scattering. The intensity of Rayleigh scattering is about 5 magnitudes lower than the laser's excitation intensity, ...
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How does a Raman Laser work?
I am trying to find out how a Raman Laser itself works. By that I mean how does it use stimulated Raman scattering to produce gain and thus make a laser. I have some knowledge of how lasers work but ...
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Finding the nonlinear polarisation density for the Raman response from $\rm CO_2$?
Given the gas temperature $T$, the wavelength of the laser beam illuminating the gas, $ \lambda $ aswell as a diffusion coefficient, $\sigma $ and the susceptibility for the stokes transition $ \chi_{...
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Phase transition detected using Raman spectra is not visible with XRD analysis
I am currently trying to analyse a paper in which perovskite material is pressurized and they observe the variation in structural properties using Synchrotron XRD and Raman Spectroscopy. Now the ...
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Rotational transition of a vibrational band of a CO$_2$ molecule?
I am currently reading this paper in regards to the lasing transitions of the CO$_2$ molecule:
https://journals.aps.org/pr/pdf/10.1103/PhysRev.136.A1187
Specifically, it keeps mentioning the ...
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