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Time Resolved Temperature Determinations From Raman Scattering Of Tio2 Coatings During Pulsed Laser Irradiation
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Book Synopsis Time-Resolved Temperature Determinations From Raman Scattering of TiO2 Coatings During Pulsed Laser Irradiation by : GJ. Exarhos
Download or read book Time-Resolved Temperature Determinations From Raman Scattering of TiO2 Coatings During Pulsed Laser Irradiation written by GJ. Exarhos and published by . This book was released on 1988 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Simultaneous measurement of Stokes/anti-Stokes Raman intensitities for a particular vibrational mode allows instantaneous surface temperatures to be determined. Time-resolved Raman spectra were measured on a specially constructed spectrometer using pulsed laser excitation and gated detection techniques. Measurements on equilibrated coatings and uncoated substrates at several temperatures served to confirm the utility of the technique for temperature determination as well as calibrate the intensity response of the instrument.
Book Synopsis Laser Induced Damage in Optical Materials by :
Download or read book Laser Induced Damage in Optical Materials written by and published by . This book was released on 1985 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Induced Damage in Optical Materials, 1985 by :
Download or read book Laser Induced Damage in Optical Materials, 1985 written by and published by . This book was released on 1988 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1989 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook of Optical Properties by : Rolf E. Hummel
Download or read book Handbook of Optical Properties written by Rolf E. Hummel and published by CRC Press. This book was released on 1995-02-24 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin Films for Optical Coating emphasizes the applications of thin films, deposition of thin films, and thin film characterization. Unlike monographs on this subject, this book presents the views of many expert authors. Individual chapters span a wide arc of topics within this field of study. The book offers an introduction to usual and unusual applications of optical thin films, treating in a more qualitative way general topics such as anticounterfeiting coatings, decorative coatings, light switches, contrast enhancement coatings, multiplexers, optical memories, and more. Contributors review thin film media for optical data storage, UV broadband and narrow-band filters, and optically active thin film coatings. Ion beam sputtering and magnetron sputtering deposition methods are described in detail. Characterization techniques are provided, including Raman spectroscopy and absorption measurements. The book also offers theories on light scattering of thin dielectric films and the electromagnetic properties of nanocermet thin films. This reference incorporates recent research by the individual authors with their views of current developments in their respective fields. Of particular interest to the reader will be an assessment of the historical developments of thin film physics written by one of the fathers of thin film technology, Professor M. Auwärter.
Book Synopsis Laser Induced Damage in Optical material: 1985 by :
Download or read book Laser Induced Damage in Optical material: 1985 written by and published by ASTM International. This book was released on with total page 581 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Induced Damaged in Optical Materials: 1985 by :
Download or read book Laser Induced Damaged in Optical Materials: 1985 written by and published by . This book was released on 1988 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pulsed Raman Temperature Measurements of Laser-Heated Silicon by : A. Compaan
Download or read book Pulsed Raman Temperature Measurements of Laser-Heated Silicon written by A. Compaan and published by . This book was released on 1980 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time resolved Raman light scattering determinations of temperature have been made in crystalline silicon where it is found that the lattice temperature is far below melting even for laser power densities of approx. 1 J/sq cm at 485 nm. In ion-implantation-amorphized silicon the pulsed laser Raman technique has identified substantial recrystallization as early as 30 nsec after the peak of the heating pulse. (Author).
Download or read book INIS Atomindeks written by and published by . This book was released on 1986 with total page 1574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Thin Films ... written by and published by . This book was released on 1986 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Time-Resolved Raman Scattering and Transmission Measurements During Pulsed Laser Annealing by : A. Compaan
Download or read book Time-Resolved Raman Scattering and Transmission Measurements During Pulsed Laser Annealing written by A. Compaan and published by . This book was released on 1980 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Raman scattering from a 7 nsec pulsed dye laser has been used to determine the onset of recrystalization following an 8 nsec dye laser excitation pulse in ion-implanted silicon. We find essentially complete recrystallization 59 nsec after the first excitation pulse and from Stokes-anti-Stokes ratios we find at 59 nsec a crystalline lattice temperature of 600 + or - 200 C. Time-resolved transmission measurements at lambda = 1.15 microns also demonstrate that no molten phase has occurred even though the usual reflectivity enhancement is observed. (Author).
Book Synopsis Optical Thin Films II by : R. I. Seddon
Download or read book Optical Thin Films II written by R. I. Seddon and published by . This book was released on 1986 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determination of Gas Temperatures from Laser-Raman Scattering by : Jack A. Salzman
Download or read book Determination of Gas Temperatures from Laser-Raman Scattering written by Jack A. Salzman and published by . This book was released on 1971 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was conducted on the feasibility of using Raman scattered laser light to measure local gas temperatures. Temperature error predictions were made based on the statistics of the scattering process and Raman spectral theory. Methods were developed for the calculation of temperature measurement accuracies as a function of Raman signal for different spectral line ratio schemes. The results of these theoretical calculations were compared with experimental rotational Raman data obtained from a laboratory-constructed Raman spectrophotometer. Nitrogen was used as a gas sample for a range of controlled temperatures from 253 to 313 K and pressures from 0. 5 to 5.0 atmospheres.
Book Synopsis Raman Studies of Surface Temperature in Laser-Heated Semiconductors by : A. D. Compaan
Download or read book Raman Studies of Surface Temperature in Laser-Heated Semiconductors written by A. D. Compaan and published by . This book was released on 1985 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project explored the uses of pulsed laser Raman scattering as a technique for studying vibrational or phonon temperatures in Si with nanosecond time resolution. Raman scattering is unique in its ability to probe in a highly selective way populations of specific phonon modes. Knowledge of how phonon populations evolve in time of fundamental importance in understanding how semiconductors respond to intense laser pulses such as in pulsed laser annealing of semiconductor surfaces. This information is crucial for understanding the dynamics of rapid laser-induced melting. Raman scattering was performed with a heat/probe sequence derived from a frequency doubled Nd:YAG-laser-pumped or N2-laser-pumped dye lasers. Initial results showed low phonon populations, consistent with only a 300-400 K temperature rise after a 10 nsec heat pulse with energy sufficient to melt the Si surface. Final results, however, indicate a population rise equivalent to a 1500 + or - 300 K phonon temperature. This is consistent with normal 1685 K melting temperature of Si. These results were confirmed in second order Raman scattering with 150 nsec pulses from a 10 kHz frequency-doubled Nd:YAG laser. Thus we measure melting-temperature phonon populations in several phonon branches. Additional experiments were done to measure the optical absorption in transiently heated silicon-on-sapphire. We found absorption consistent with that of molten Si from 0.8 eV to 3.1 eV.
Book Synopsis Proceedings of the Southwest Conference on Optics by : Robin Scott McDowell
Download or read book Proceedings of the Southwest Conference on Optics written by Robin Scott McDowell and published by . This book was released on 1985 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Application of Raman and Anti-stokes Raman Spectroscopy for In-situ Monitoring of Structural Changes in Laser Irradiated Titanium Dioxide Materials by :
Download or read book The Application of Raman and Anti-stokes Raman Spectroscopy for In-situ Monitoring of Structural Changes in Laser Irradiated Titanium Dioxide Materials written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of Raman and anti-stokes Raman spectroscopy to investigate the effect of exposure to high power laser radiation on the crystalline phases of TiO2 has been investigated. Measurement of the changes, over several time integrals, in the Raman and anti-stokes Raman of TiO2 spectra with exposure to laser radiation is reported. Raman and anti-stokes Raman provide detail on both the structure and the kinetic process of changes in crystalline phases in the titania material. The effect of laser exposure resulted in the generation of increasing amounts of the rutile crystalline phase from the anatase crystalline phase during exposure. The Raman spectra displayed bands at 144 cm−1 (A1g), 197 cm−1 (Eg), 398 cm−1 (B1g), 515 cm−1 (A1g), and 640 cm−1 (Eg) assigned to anatase which were replaced by bands at 143 cm−1 (B1g), 235 cm−1 (2 phonon process), 448 cm−1 (Eg) and 612 cm−1 (A1g) which were assigned to rutile. This indicated that laser irradiation of TiO2 changes the crystalline phase from anatase to rutile. Raman and anti-stokes Raman are highly sensitive to the crystalline forms of TiO2 and allow characterisation of the effect of laser irradiation upon TiO2. This technique would also be applicable as an in situ method for monitoring changes during the laser irradiation process.
