Total Internal Reflection Spectroscopy for Studying Soft Matter
... be delivered to the sample simultaneously) and can be difficult to interpret. Furthermore, molecules at an interface that do not have a preferred orientation are invisible in second-order nonlinear spectroscopy, so such techniques are of limited value for quantitative analysis of composition. The se ...
... be delivered to the sample simultaneously) and can be difficult to interpret. Furthermore, molecules at an interface that do not have a preferred orientation are invisible in second-order nonlinear spectroscopy, so such techniques are of limited value for quantitative analysis of composition. The se ...
Raman spectroscopy of graphite - Institut für Festkörperphysik
... are stacked in an ABAB manner. Macroscopic single crystals of graphite do not occur in nature. So-called kish graphite—which is often referred to as a single crystal— consists of many small crystallites (up to 100×100 µm2 ) which are oriented randomly. Highly oriented pyrolytic graphite (HOPG) is ar ...
... are stacked in an ABAB manner. Macroscopic single crystals of graphite do not occur in nature. So-called kish graphite—which is often referred to as a single crystal— consists of many small crystallites (up to 100×100 µm2 ) which are oriented randomly. Highly oriented pyrolytic graphite (HOPG) is ar ...
Simultaneous slow and fast light effects using in atomic vapor
... cell is heated to a steady temperature of 70 oC using bifilarly wound coils in order to reduce the axial magnetic field due to the coil. All the beams are combined using polarizing and nonpolarizing beam splitters at the input end before entering the cell. After passing through the cell, the probe b ...
... cell is heated to a steady temperature of 70 oC using bifilarly wound coils in order to reduce the axial magnetic field due to the coil. All the beams are combined using polarizing and nonpolarizing beam splitters at the input end before entering the cell. After passing through the cell, the probe b ...
Growing Negative Pressure in Dissolved Solutes: Raman - HAL-Insu
... wavenumber of the line center. Only this latter differs from mono- to biphasic states. No Bose-Einstein (BE) thermal correction was done27, since Raman shifts are compared at identical temperatures in two different pressure conditions (monophasic and biphasic regimes). Moreover this correction would ...
... wavenumber of the line center. Only this latter differs from mono- to biphasic states. No Bose-Einstein (BE) thermal correction was done27, since Raman shifts are compared at identical temperatures in two different pressure conditions (monophasic and biphasic regimes). Moreover this correction would ...
Chapter 5 Experimental Apparatus II
... 5.2 Cooling in a Three-Dimensional Optical Lattice to suppression of the absorption of rescattered light in the MOT. The second-hand absorption of photons that have already been spontaneously scattered by MOT atoms, or “radiation trapping,” leads to temperature and density limitations in free-space ...
... 5.2 Cooling in a Three-Dimensional Optical Lattice to suppression of the absorption of rescattered light in the MOT. The second-hand absorption of photons that have already been spontaneously scattered by MOT atoms, or “radiation trapping,” leads to temperature and density limitations in free-space ...
Finding a needle in a haystack - Centre for Process Systems
... these images was a recoated tip and the level of enhancement is smaller than with a newly coated tip, as demonstrated in Figure 2A. The TERS image generated by the Raman band due to the RBM vibration at ~173 cm-1, which is specific to the contaminant SWCNT (type B), reveals the location of this type ...
... these images was a recoated tip and the level of enhancement is smaller than with a newly coated tip, as demonstrated in Figure 2A. The TERS image generated by the Raman band due to the RBM vibration at ~173 cm-1, which is specific to the contaminant SWCNT (type B), reveals the location of this type ...
Raman Spectroscopy on Semiconductor Nanowires
... Studies comparing Raman scattering experiments of bulk and nanostructured materials have been reported in literature for several different kind of systems. It is usually observed that the transversal optical (TO) and the longitudinal optical (LO) modes have a position in energy close to that observe ...
... Studies comparing Raman scattering experiments of bulk and nanostructured materials have been reported in literature for several different kind of systems. It is usually observed that the transversal optical (TO) and the longitudinal optical (LO) modes have a position in energy close to that observe ...
Interaction of the C-terminal peptide from pigeon cytochrome C with
... lymphocytes of a transgenic mouse strain called AND. This system is widely used to study ...
... lymphocytes of a transgenic mouse strain called AND. This system is widely used to study ...
The Molecular Structure of Bismuth Oxide by
... strengths, and overall symmetry of metal oxide species. This is not only true for the more common crystalline and solution phases (17), but also for the exotic twodimensional surface phases (18,19). The basic idea behind the Raman analysis is that different molecular structures typically have differ ...
... strengths, and overall symmetry of metal oxide species. This is not only true for the more common crystalline and solution phases (17), but also for the exotic twodimensional surface phases (18,19). The basic idea behind the Raman analysis is that different molecular structures typically have differ ...
supplementary information
... shelled by inert silica, from which there are no enhanced Raman photons emitted. The SHINERS signal is solely from the probed molecules at the junctions of Au@SiO2 NPs and the substrate. Regarding the thickness-dependent enhancement factor, our FDTD simulation also indicates that, for 55 nm Au@4 nm ...
... shelled by inert silica, from which there are no enhanced Raman photons emitted. The SHINERS signal is solely from the probed molecules at the junctions of Au@SiO2 NPs and the substrate. Regarding the thickness-dependent enhancement factor, our FDTD simulation also indicates that, for 55 nm Au@4 nm ...
Untitled
... • Raman scattering may therefore be used to determine chemical composition and molecular structure. • Since most Raman lines are stronger than Brillouin lines, and have higher energies, standard spectrometers using scanning monochromators may be used to measure them. • Raman spectrometers are stand ...
... • Raman scattering may therefore be used to determine chemical composition and molecular structure. • Since most Raman lines are stronger than Brillouin lines, and have higher energies, standard spectrometers using scanning monochromators may be used to measure them. • Raman spectrometers are stand ...
Single-pulse coherent anti-Stokes Raman scattering microscopy
... CARS spectrum is obtained from the Fourier-transform of an interferometric autocorrelation (IAC) signal. FT-CARS microspectroscopy allows the suppression of the nonresonant signal and the measurement of a broadband CARS spectrum with high spectral resolution regardless of the pulse bandwidth [16,17] ...
... CARS spectrum is obtained from the Fourier-transform of an interferometric autocorrelation (IAC) signal. FT-CARS microspectroscopy allows the suppression of the nonresonant signal and the measurement of a broadband CARS spectrum with high spectral resolution regardless of the pulse bandwidth [16,17] ...
Development of a New Optical Wavelength Rejection Filter
... By the placement of the filter into a collimated beam, a narrow wavelength band is Bragg diffracted out, while adjacent wavelengths which do not meet the Bragg condition are transmitted. Figure 3 shows the Raman spectrum of polypropylene, a highly scattering material with numerous low-frequency mode ...
... By the placement of the filter into a collimated beam, a narrow wavelength band is Bragg diffracted out, while adjacent wavelengths which do not meet the Bragg condition are transmitted. Figure 3 shows the Raman spectrum of polypropylene, a highly scattering material with numerous low-frequency mode ...
NONLINEAR SCATTERING EFFECTS IN OPTICAL FIBERS
... is absorbed by the molecular vibrations or phonons in the medium. In other words one can state that the energy of a light wave is transferred to another wave, which is at a higher wavelength (lower energy) such that energy difference appears in form of phonons [1]. The other wave is known as the Stok ...
... is absorbed by the molecular vibrations or phonons in the medium. In other words one can state that the energy of a light wave is transferred to another wave, which is at a higher wavelength (lower energy) such that energy difference appears in form of phonons [1]. The other wave is known as the Stok ...
Raman tailored photonic-crystal-fiber for telecom band photon
... future quantum communication networks. Indeed, glass fibers are widely investigated for various nonlinear applications [4]. They can exhibit very low absorption, strong confinement over long distance and high nonlinearities according to the chosen glass. Moreover, the various design parameters in mi ...
... future quantum communication networks. Indeed, glass fibers are widely investigated for various nonlinear applications [4]. They can exhibit very low absorption, strong confinement over long distance and high nonlinearities according to the chosen glass. Moreover, the various design parameters in mi ...
Mechanical mapping with chemical specificity by confocal Brillouin
... originating from damped acoustic phonons, revealed the viscoelastic nature of the material putatively due to water hydration. The evidence of hydrated (type I) collagen fibrils forming the extracellular matrix and of embedded epithelial cells was provided by Raman scattering spectra at a gland/conne ...
... originating from damped acoustic phonons, revealed the viscoelastic nature of the material putatively due to water hydration. The evidence of hydrated (type I) collagen fibrils forming the extracellular matrix and of embedded epithelial cells was provided by Raman scattering spectra at a gland/conne ...
Laser multipass system with interior cell configuration
... losses. The alignment of the multipass cell without the sample vessel inside is straightforward and suitable to a laboratory environment as the entire system is in the open air and an experimenter can readily trace the laser beam’s path. However, once a sample cell is inserted in the central region, ...
... losses. The alignment of the multipass cell without the sample vessel inside is straightforward and suitable to a laboratory environment as the entire system is in the open air and an experimenter can readily trace the laser beam’s path. However, once a sample cell is inserted in the central region, ...
Time-domain optical data storage by use of Raman coherent population trapping
... homogeneous linewidths and can exceed 106 bits at a single position.5' 6 However, to satisfy the requirement of long-lived optical coherences, it is necessary to use materials with small optical matrix elements, use highly stable lasers, and operate at liquid-helium temperatures.' As a result, pract ...
... homogeneous linewidths and can exceed 106 bits at a single position.5' 6 However, to satisfy the requirement of long-lived optical coherences, it is necessary to use materials with small optical matrix elements, use highly stable lasers, and operate at liquid-helium temperatures.' As a result, pract ...
Acceleration of ultracold atoms: towards a measurement of
... leading to an accurate determination of the fine structure constant α. It consists in measuring the momentum transferred to an atom by a Raman transition involving only one hyperfine level, the measurement accuracy being then proportional to the number of transitions. Two different geometries can be ...
... leading to an accurate determination of the fine structure constant α. It consists in measuring the momentum transferred to an atom by a Raman transition involving only one hyperfine level, the measurement accuracy being then proportional to the number of transitions. Two different geometries can be ...
Introduction - NC State University
... • Stokes shift: phonon is created; light loses energy • Anti-Stokes shift: phonon is destroyed; light gains energy ...
... • Stokes shift: phonon is created; light loses energy • Anti-Stokes shift: phonon is destroyed; light gains energy ...
Vacuum-ultraviolet to infrared supercontinuum in hydrogen
... spectrum is measured with an evacuated scanning monochromator equipped with a scintillator and a photomultiplier tube (PMT); lower, the UV-NIR and DUV spectra are measured by directing the beam to either a UV-NIR or a DUV CCD-based spectrometer using a UV-enhanced optical fiber and a parabolic mirro ...
... spectrum is measured with an evacuated scanning monochromator equipped with a scintillator and a photomultiplier tube (PMT); lower, the UV-NIR and DUV spectra are measured by directing the beam to either a UV-NIR or a DUV CCD-based spectrometer using a UV-enhanced optical fiber and a parabolic mirro ...
10-draft-EPS-238
... propagation) determined by the relative amplitudes ax and ay and phases εx and εy. Linear and circular polarizations are simply special cases of the ellipse. Note that this is not a unique description of the polarization state, although it is the most common one, and also that there is an equivalent ...
... propagation) determined by the relative amplitudes ax and ay and phases εx and εy. Linear and circular polarizations are simply special cases of the ellipse. Note that this is not a unique description of the polarization state, although it is the most common one, and also that there is an equivalent ...
G 3 Geochemistry Geophysics
... hydrothermal vent environments where targets of interest such as high-temperature vent fluids, fragile chimney structures and bacterial mats may be either too hot for contact analysis or altered when brought to the surface for ship- or shore-based analysis. Raman spectroscopy has been widely used in ...
... hydrothermal vent environments where targets of interest such as high-temperature vent fluids, fragile chimney structures and bacterial mats may be either too hot for contact analysis or altered when brought to the surface for ship- or shore-based analysis. Raman spectroscopy has been widely used in ...
View PDF - Oriental Journal of Chemistry
... for bonding, only 4 vectors are taken into account whereas if IR or Raman Spectroscopy is being considered, 3x5 =15 ( 3xN, N = number of atoms in the molecule) Cartesian coordinates will be considered. The use of 3N vectors is not only cumbersome but also the level of mathematical theory accompanyin ...
... for bonding, only 4 vectors are taken into account whereas if IR or Raman Spectroscopy is being considered, 3x5 =15 ( 3xN, N = number of atoms in the molecule) Cartesian coordinates will be considered. The use of 3N vectors is not only cumbersome but also the level of mathematical theory accompanyin ...
Influence of structural disorder on Raman scattering in amorphous
... narrow crystalline peak of the transverse optical ~TO! phonon.1,2 We would like to point out that such a method is not quite accurate, since annealing of amorphous silicon microparticles and films differently influences the Raman spectra in the optical region. For example, in Ref. 3 it was shown tha ...
... narrow crystalline peak of the transverse optical ~TO! phonon.1,2 We would like to point out that such a method is not quite accurate, since annealing of amorphous silicon microparticles and films differently influences the Raman spectra in the optical region. For example, in Ref. 3 it was shown tha ...
Raman spectroscopy
Raman spectroscopy (/ˈrɑːmən/; named after Sir C. V. Raman) is a spectroscopic technique used to observe vibrational, rotational, and other low-frequency modes in a system. Raman spectroscopy is commonly used in chemistry to provide a fingerprint by which molecules can be identified.It relies on inelastic scattering, or Raman scattering, of monochromatic light, usually from a laser in the visible, near infrared, or near ultraviolet range. The laser light interacts with molecular vibrations, phonons or other excitations in the system, resulting in the energy of the laser photons being shifted up or down. The shift in energy gives information about the vibrational modes in the system. Infrared spectroscopy yields similar, but complementary, information.Typically, a sample is illuminated with a laser beam. Electromagnetic radiation from the illuminated spot is collected with a lens and sent through a monochromator. Elastic scattered radiation at the wavelength corresponding to the laser line (Rayleigh scattering) is filtered out, while the rest of the collected light is dispersed onto a detector by either a notch filter or a band pass filter.Spontaneous Raman scattering is typically very weak, and as a result the main difficulty of Raman spectroscopy is separating the weak inelastically scattered light from the intense Rayleigh scattered laser light. Historically, Raman spectrometers used holographic gratings and multiple dispersion stages to achieve a high degree of laser rejection. In the past, photomultipliers were the detectors of choice for dispersive Raman setups, which resulted in long acquisition times. However, modern instrumentation almost universally employs notch or edge filters for laser rejection and spectrographs either axial transmissive (AT), Czerny–Turner (CT) monochromator, or FT (Fourier transform spectroscopy based), and CCD detectors.There are a number of advanced types of Raman spectroscopy, including surface-enhanced Raman, resonance Raman, tip-enhanced Raman, polarised Raman, stimulated Raman (analogous to stimulated emission), transmission Raman, spatially offset Raman, and hyper Raman.