Photoacoustic Raman spectroscopy (PARS) using cw laser sources

1979 ◽  
Vol 34 (2) ◽  
pp. 144-146 ◽  
Author(s):  
Joseph J. Barrett ◽  
Michael J. Berry
Keyword(s):  
Raman Spectroscopy ◽  
Cw Laser ◽  
Laser Sources

High-Resolution Raman Spectroscopy of Gases with cw-Laser Excitation*

1967 ◽  
Vol 57 (1) ◽  
pp. 19 ◽  
Author(s):  
Alfons Weber ◽  
Sergio P. S. Porto ◽  
Leonard E. Cheesman ◽  
Joseph J. Barrett
Keyword(s):  
Raman Spectroscopy ◽  
High Resolution ◽  
Laser Excitation ◽  
Cw Laser

Continuous-Wave CO2 Laser-Excited Infrared Emission Spectroscopy

1987 ◽  
Vol 41 (6) ◽  
pp. 1009-1019 ◽  
Author(s):  
H. H. Belz ◽  
H. Gutberlet ◽  
B. Schallert ◽  
B. Schrader
Keyword(s):  
Raman Spectroscopy ◽  
Thermal Equilibrium ◽  
Emission Spectroscopy ◽  
Continuous Wave ◽  
Emission Spectra ◽  
Infrared Emission ◽  
Temperature Profiles ◽  
Molecular Gases ◽  
Cw Laser ◽  
Potential Applications

Radiation of a cw CO2 laser can be used to excite infrared emission spectra of nearly all molecular gases by adding small amounts of SF6 as a sensitizer. These emission spectra show a thermal equilibrium between vibrational, rotational, and translational states with temperatures up to 1200 K. Temperature profiles of these gases about a focused cw CO2 laser beam are analyzed by Raman spectroscopy. The detection of small amounts of sample and investigations of cw laser-induced chemical reactions are interesting potential applications.

Laser sources for Raman spectroscopy

2011 ◽  
Author(s):  
J. Kilmer ◽  
A. Iadevaia ◽  
Y. Yin
Keyword(s):  
Raman Spectroscopy ◽  
Laser Sources

scholarly journals Surface-Enhanced Raman Scattering: Introduction and Applications

2020 ◽  
Author(s):  
Samir Kumar ◽  
Prabhat Kumar ◽  
Anamika Das ◽  
Chandra Shakher Pathak
Keyword(s):  
Raman Spectroscopy ◽  
Raman Scattering ◽  
Rayleigh Scattering ◽  
Scattered Light ◽  
Monochromatic Light ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Laser Sources

Scattering of light by molecules can be elastic, Rayleigh scattering, or inelastic, Raman scattering. In the elastic scattering, the photon’s energy and the state of the molecule after the scattering events are unchanged. Hence, Rayleigh scattered light does not contain much information on the structure of molecular states. In inelastic scattering, the frequency of monochromatic light changes upon interaction with the vibrational states, or modes, of a molecule. With the advancement in the laser sources, better and compact spectrometers, detectors, and optics Raman spectroscopy have developed as a highly sensitive technique to probe structural details of a complex molecular structure. However, the low scattering cross section (10−31) of Raman scattering has limited the applications of the conventional Raman spectroscopy. With the discovery of surface-enhanced Raman scattering (SERS) in 1973 by Martin Fleischmann, the interest of the research community in Raman spectroscopy as an analytical method has been revived. This chapter aims to familiarize the readers with the basics of Raman scattering phenomenon and SERS. This chapter will also discuss the latest developments in the SERS and its applications in various fields.

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