Stimulated Raman scattering

White, J. C.

doi:10.1007/3-540-55571-4_4

Cited by 18 publications

(8 citation statements)

References 238 publications

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“…First, gaseous samples are generated and an inert matrix gas, such as Ar or Kr, is mixed in a ratio of 1:500, such that the molecules get completely isolated from each other in the frozen gas matrix; their spectra is then taken [124] Optical tweezers Raman spectroscopy This technique allows study of individual particles by tweezing them between optical tweezers [129] Stimulated Raman spectroscopy The intra-or inter-molecular Raman spectrum of a gas or molecular cluster can be determined using this technique. It uses two spatially coincident pulses, which help in Raman determination at various points [130] Two-dimensional Raman correlation spectroscopy…”

Section: Surface-enhanced Raman Spectroscopymentioning

confidence: 99%

Principles and applications of Raman spectroscopy in pharmaceutical drug discovery and development

Gala

Chauhan

2014

Expert Opinion on Drug Discovery

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Raman spectroscopy has a number of potential applications within drug discovery and development. It can be used to estimate the molecular activity of drugs and to establish a drug's physicochemical properties such as its partition coefficient. It can also be used in compatibility studies during the drug formulation process. Raman spectroscopy's immense potential should be further investigated in future.

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Section: Surface-enhanced Raman Spectroscopymentioning

confidence: 99%

Principles and applications of Raman spectroscopy in pharmaceutical drug discovery and development

Gala

Chauhan

2014

Expert Opinion on Drug Discovery

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“…This method, SRS (Mollenauer et al, 1992), is a direct two-photon, third-order nonlinear optical process that results in inelastic light scattering without the requirement of phase matching (Measures, 1983). This process is efficient for gases such as hydrogen and deuterium because they have high-frequency vibrational modes and narrow spectral linewidths (Shen and Bloembergen, 1965).…”

Section: Raman Cells and Stimulated Raman Scattering (Srs)mentioning

confidence: 99%

A mobile differential absorption lidar to measure sub-hourly fluctuation of tropospheric ozone profiles in the Baltimore–Washington, D.C. region

et al. 2014

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Abstract. Tropospheric ozone profiles have been retrieved from the new ground-based National Aeronautics and Space Administration (NASA) Goddard Space Flight Center TROPospheric OZone DIfferential Absorption Lidar (GSFC TROPOZ DIAL) in Greenbelt, MD (38.99 • N, 76.84 • W, 57 m a.s.l.), from 400 m to 12 km a.g.l. Current atmospheric satellite instruments cannot peer through the optically thick stratospheric ozone layer to remotely sense boundary layer tropospheric ozone. In order to monitor this lower ozone more effectively, the Tropospheric Ozone Lidar Network (TOLNet) has been developed, which currently consists of five stations across the US. The GSFC TROPOZ DIAL is based on the DIAL technique, which currently detects two wavelengths, 289 and 299 nm, with multiple receivers. The transmitted wavelengths are generated by focusing the output of a quadrupled Nd:YAG laser beam (266 nm) into a pair of Raman cells, filled with high-pressure hydrogen and deuterium, using helium as buffer gas. With the knowledge of the ozone absorption coefficient at these two wavelengths, the range-resolved number density can be derived. An interesting atmospheric case study involving the stratospherictropospheric exchange (STE) of ozone is shown, to emphasize the regional importance of this instrument as well as to assess the validation and calibration of data. There was a low amount of aerosol aloft, and an iterative aerosol correction has been performed on the retrieved data, which resulted in less than a 3 ppb correction to the final ozone concentration. The retrieval yields an uncertainty of 16-19 % from 0 to 1.5 km, 10-18 % from 1.5 to 3 km, and 11-25 % from 3 to 12 km according to the relevant aerosol concentration aloft. There are currently surface ozone measurements hourly and ozonesonde launches occasionally, but this system will be the first to make routine tropospheric ozone profile measurements in the Baltimore-Washington, D.C. area.

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“…where g(ℏδ w ) is the joint state density of Raman transition. Therefore, the FWHM of spontaneous Raman spectra is inversely proportional to Raman gain coefficient . So Si QDs can increase the Raman gain coefficient of water molecules.…”

Section: Resultsmentioning

confidence: 99%

“…The third field E 3 represents an electrostatic field E dc , which does not modify the sum of the frequencies. G ss is the Raman power gain coefficient per unit pump intensity …”

Section: Resultsmentioning

confidence: 99%

“…G ss is the Raman power gain coefficient per unit pump intensity. [21] The exciton effect enhances the SRS intensity of water molecules by increasing the Raman susceptibility; the enhancement involves two aspects: (1) The nonlinear optical properties of Si QDs are characterized an "enhancement of local electric field" resulting from the exciton effect. This electric field is an electrostatic field (E 3 ).…”

Section: Resultsmentioning

confidence: 99%

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Si quantum dots enhancement stimulated Raman scattering of water molecules

Wang

et al. 2018

J Raman Spectroscopy

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Stimulated Raman scattering (SRS) spectra of the OH stretching vibrations of pure water and 2‐nm Si quantum dots (Si QDs) water solution have been investigated under different pump laser energies. Simultaneously, we have studied the spontaneous Raman spectra of pure water and Si QDs water solution at room temperature and atmospheric pressure. The results show that SRS intensity of Si QDs water solution is an order of magnitude higher than that of pure water at the same laser energy, which indicates that Si QDs enhance the SRS intensity of water molecules. The QDs enhancement SRS mechanism is attributed to the increase of third‐order nonlinear Raman susceptibility from the electric fields induced by the exciton effect of Si QDs.

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Stimulated Raman scattering

Cited by 18 publications

References 238 publications

Principles and applications of Raman spectroscopy in pharmaceutical drug discovery and development

Principles and applications of Raman spectroscopy in pharmaceutical drug discovery and development

A mobile differential absorption lidar to measure sub-hourly fluctuation of tropospheric ozone profiles in the Baltimore–Washington, D.C. region

Si quantum dots enhancement stimulated Raman scattering of water molecules

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