Laser Locking with Doppler-free Saturated Absorption Spectroscopy
... In order to counteract this Doppler broadening and obtain higher resolution, a second counterpropagating “pump” beam is passed through the cell. The Doppler shifted resonance frequency for atoms moving with velocity vz is opposite that of the probe beam. That is, the pump beam interacts with the gro ...
... In order to counteract this Doppler broadening and obtain higher resolution, a second counterpropagating “pump” beam is passed through the cell. The Doppler shifted resonance frequency for atoms moving with velocity vz is opposite that of the probe beam. That is, the pump beam interacts with the gro ...
Light Scattering
... medium needs to be inhomogeneous (density, refractive index). These inhomogeneities can occur as fluctuations. The scattering intensity is high when the fluctuations are large. A laser beam in calm, clean air can hardly be detected at an angle of 90°. If, however, there are large fluctuations of ref ...
... medium needs to be inhomogeneous (density, refractive index). These inhomogeneities can occur as fluctuations. The scattering intensity is high when the fluctuations are large. A laser beam in calm, clean air can hardly be detected at an angle of 90°. If, however, there are large fluctuations of ref ...
Low atmospheric density measurement based on Rayleigh
... trations for combustion flows, which are of great guiding significance for a theoretical design and practical application of the high-speed flight vehicle. In particle image velocimetry (PIV) [6], the fluid motion is made visible by adding small tracer particles to infer the flow velocity field. Met ...
... trations for combustion flows, which are of great guiding significance for a theoretical design and practical application of the high-speed flight vehicle. In particle image velocimetry (PIV) [6], the fluid motion is made visible by adding small tracer particles to infer the flow velocity field. Met ...
A day in the life of a Laser scientist
... C.V. Raman is the father of the green light is scattered by water,components a substance,ata small (1 Superposition of ...
... C.V. Raman is the father of the green light is scattered by water,components a substance,ata small (1 Superposition of ...
Polarization spectra of excited-state-Mg(3p)--rare-gas
... atoms and ground-state Ar and Ne atoms are studied by absorption of light from a second polarized nonresonant radiation field tuned in the vicinity of an atomic Mg electronic transition from the resonant 3p 'P, level to the more highly excited Ss 'So level. The experiments reveal that a large amount ...
... atoms and ground-state Ar and Ne atoms are studied by absorption of light from a second polarized nonresonant radiation field tuned in the vicinity of an atomic Mg electronic transition from the resonant 3p 'P, level to the more highly excited Ss 'So level. The experiments reveal that a large amount ...
Optically Enhanced Magnetic Resonance
... Atoms and molecules may contain different types of angular momentum. The most important reservoirs include the rotational motion of molecules, the orbital angular momentum of electrons, and the spin angular momentum of electrons and nuclei. Not all these types of angular momentum couple directly to ...
... Atoms and molecules may contain different types of angular momentum. The most important reservoirs include the rotational motion of molecules, the orbital angular momentum of electrons, and the spin angular momentum of electrons and nuclei. Not all these types of angular momentum couple directly to ...
Measuring cellular structure at submicrometer scale with light
... there are two strategies by which particle size can be determined. The particle can be illuminated by light of a fixed wavelength and the angular variations of the scattered intensity measured. Alternatively, light can be collected from a fixed angle to measure the intensity changes of the scattered ...
... there are two strategies by which particle size can be determined. The particle can be illuminated by light of a fixed wavelength and the angular variations of the scattered intensity measured. Alternatively, light can be collected from a fixed angle to measure the intensity changes of the scattered ...
Lab Handout
... summarises what the table is showing. When investigating, the order of the entries is arbitrary. When reporting results, they should be sorted into an order. Show all set-ups for each type of calculation: be explicit. If you have to perform the same calculation more than once you do not have to writ ...
... summarises what the table is showing. When investigating, the order of the entries is arbitrary. When reporting results, they should be sorted into an order. Show all set-ups for each type of calculation: be explicit. If you have to perform the same calculation more than once you do not have to writ ...
Full text - Simon Fraser University
... For example, the quantum Hall effect happens in a two-dimensional systems usually at low temperatures. Recently, however, an integer quantum Hall effect was realized in graphene at room temperature [1] and theoretically a prediction of the existence of anomalous quantum Hall effect in honeycomb materia ...
... For example, the quantum Hall effect happens in a two-dimensional systems usually at low temperatures. Recently, however, an integer quantum Hall effect was realized in graphene at room temperature [1] and theoretically a prediction of the existence of anomalous quantum Hall effect in honeycomb materia ...
Simultaneous slow and fast light effects using in atomic vapor
... (probe) field. However, a more practical approach based on the results presented here is to treat the strong intracavity beam itself as a single-frequency Raman pump, and use a weaker beam as the Raman probe. This weaker beam would be derived from the laser output but dynamically shifted so as to st ...
... (probe) field. However, a more practical approach based on the results presented here is to treat the strong intracavity beam itself as a single-frequency Raman pump, and use a weaker beam as the Raman probe. This weaker beam would be derived from the laser output but dynamically shifted so as to st ...
Chapter 5 Experimental Apparatus II
... 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 MOTs [Sesko91; Ellinger94]. These rescattering even ...
... 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 MOTs [Sesko91; Ellinger94]. These rescattering even ...
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 ...
as a PDF
... where λD is the Debye’s length in the plasma and k is the magnitude of the difference between the scattered wave vector KS and the incident wave vector KO . Since the Thomson scattering is elastic, KS = KO . If α <<1, the scattering comes from the uncorrelated electron motion and leads to incohe ...
... where λD is the Debye’s length in the plasma and k is the magnitude of the difference between the scattered wave vector KS and the incident wave vector KO . Since the Thomson scattering is elastic, KS = KO . If α <<1, the scattering comes from the uncorrelated electron motion and leads to incohe ...
Optical pumping studies of vibrational energy transfer
... processes may produce strong vibrational excitation of N2 and O2, and even lead to ionization of these species by association mechanisms such as that given by Eq. 共3兲. Additionally, it is well known that the rate of electron detachment from O⫺ 2 ions increases by several orders of magnitude as the t ...
... processes may produce strong vibrational excitation of N2 and O2, and even lead to ionization of these species by association mechanisms such as that given by Eq. 共3兲. Additionally, it is well known that the rate of electron detachment from O⫺ 2 ions increases by several orders of magnitude as the t ...
Raman spectroscopy of graphite - Institut für Festkörperphysik
... disorder in a graphite sample gives rise to a number of Raman peaks with quite peculiar properties (Tuinstra & Koenig 1970). Vidano et al. (1981) found that the disorder-induced Raman modes depend on the energy of the incoming laser light; their frequencies shift when the laser energy is changed. Th ...
... disorder in a graphite sample gives rise to a number of Raman peaks with quite peculiar properties (Tuinstra & Koenig 1970). Vidano et al. (1981) found that the disorder-induced Raman modes depend on the energy of the incoming laser light; their frequencies shift when the laser energy is changed. Th ...
Finding a needle in a haystack - Centre for Process Systems
... spectroscopy (SERS), which was discovered more than 30 years ago,[1] and atomic force microscopy (AFM). Tip-enhanced Raman scattering (TERS) has emerged as a promising technique that offers both rich chemical information and nanometer spatial resolution.[2-6] The idea of this approach is to probe sa ...
... spectroscopy (SERS), which was discovered more than 30 years ago,[1] and atomic force microscopy (AFM). Tip-enhanced Raman scattering (TERS) has emerged as a promising technique that offers both rich chemical information and nanometer spatial resolution.[2-6] The idea of this approach is to probe sa ...
Electromagnetic Radiation (EMR) and Remote Sensing
... When passing through the atmosphere, EMR interact with the suspended particles, such as aerosols, and clouds. Therefore scattering process happens. Three types of atmospheric scattering are important in remote sensing considerations. ...
... When passing through the atmosphere, EMR interact with the suspended particles, such as aerosols, and clouds. Therefore scattering process happens. Three types of atmospheric scattering are important in remote sensing considerations. ...
The Molecular Structure of Bismuth Oxide by
... perature by the addition of metal cation impurities such as niobium or tantalum. Although the molecular structures of the bismuth oxide polyhedra have been determined for the well-ordered (Y-and y-phases of B&O,, the structures of the bismuth oxide species in the metastable p- and &phases have not b ...
... perature by the addition of metal cation impurities such as niobium or tantalum. Although the molecular structures of the bismuth oxide polyhedra have been determined for the well-ordered (Y-and y-phases of B&O,, the structures of the bismuth oxide species in the metastable p- and &phases have not b ...
Interferometric near-infrared spectroscopy directly quantifies optical
... [Eqs. (2) and (3)] and parametric (e.g., temporal) averages within a sample. DSCL techniques have two main limitations. Firstly, the photon time-of-flight (TOF) is not measured. Accurate determination of particle dynamics from multiply scattered light is challenging if the TOF distribution is unknow ...
... [Eqs. (2) and (3)] and parametric (e.g., temporal) averages within a sample. DSCL techniques have two main limitations. Firstly, the photon time-of-flight (TOF) is not measured. Accurate determination of particle dynamics from multiply scattered light is challenging if the TOF distribution is unknow ...
Raman Spectroscopy on Semiconductor Nanowires
... and electronic states. The scattering process involves two energy quanta simultaneously. It is usually schematized in two steps: i. A photon with energy hν o and wave vector q is absorbed, exciting the system from a initial state 1 to a state n; ii. The system emits a photon with energy hν ' and wav ...
... and electronic states. The scattering process involves two energy quanta simultaneously. It is usually schematized in two steps: i. A photon with energy hν o and wave vector q is absorbed, exciting the system from a initial state 1 to a state n; ii. The system emits a photon with energy hν ' and wav ...
Light & Matter: Absorption and Scattering
... • It is possible for the incident photons to interact with the molecules in such a way that energy is either gained or lost so that the scattered photons are shifted in frequency. This is called inelastic scattering including Raman scattering (~1 in 107 photons) • Raman scattering produces scat ...
... • It is possible for the incident photons to interact with the molecules in such a way that energy is either gained or lost so that the scattered photons are shifted in frequency. This is called inelastic scattering including Raman scattering (~1 in 107 photons) • Raman scattering produces scat ...
supplementary information
... S3. The advantage of SHINERS over tip-enhanced Raman spectroscopy (TERS) Since SERS is a nanostructure-based molecular spectroscopy, it is in principle extremely difficult to directly use SERS to study atomically flat single-crystal surfaces that cannot effectively support the strong surface plasmon ...
... S3. The advantage of SHINERS over tip-enhanced Raman spectroscopy (TERS) Since SERS is a nanostructure-based molecular spectroscopy, it is in principle extremely difficult to directly use SERS to study atomically flat single-crystal surfaces that cannot effectively support the strong surface plasmon ...
Laser Chemistry Emeritus Group - Max Planck Institut für Quantenoptik
... amplitude and phase into a simple diatomic system could be large enough to carry a million bits within one molecule. Thus the advancement of vibrational laser control is not only a chance for chemistry but also for molecular informatics on a massively parallel basis. We already assume that we can co ...
... amplitude and phase into a simple diatomic system could be large enough to carry a million bits within one molecule. Thus the advancement of vibrational laser control is not only a chance for chemistry but also for molecular informatics on a massively parallel basis. We already assume that we can co ...
Beyond Optical Molasses: 3D Raman Sideband Cooling of Atomic Cesium to High Phase-Space Density.
... some respects, none thus far combine the speed, ease-ofuse, efficiency, and versatility of optical molasses. However, at densities high enough for atoms within the sample to exchange photons, light-induced atom-atom interactions [5–8] cause density-dependent heating and loss that severely limit the ...
... some respects, none thus far combine the speed, ease-ofuse, efficiency, and versatility of optical molasses. However, at densities high enough for atoms within the sample to exchange photons, light-induced atom-atom interactions [5–8] cause density-dependent heating and loss that severely limit the ...
Observation of Cooper minimum in Krypton using high harmonic
... of the spectrum by second order diffraction. We experienced a similar problem when recording the spectrum of xenon, due to the very strong emission around 100 eV which appeared as a second peak at 50 eV. This was improved when we replaced the Hitachi grating with a Shimadzu grating. The Shimadzu gra ...
... of the spectrum by second order diffraction. We experienced a similar problem when recording the spectrum of xenon, due to the very strong emission around 100 eV which appeared as a second peak at 50 eV. This was improved when we replaced the Hitachi grating with a Shimadzu grating. The Shimadzu gra ...