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Showing 1 to 20 of 229 for “"Optical absorption"”.
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Optical absorption of transition metal doped glasses
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1988.
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Temperature Effects on Radiation-Induced Optical Absorption in Pyrex
Made available in DSpace on 2017-07-06T18:55:29Z (GMT). No. of bitstreams: 3 Nadler_Jonathon_H_MS.pdf: 33331966 bytes, checksum: 652a8d0e2260e401fa48fd18f9f5e960 (MD5) Nadler_Jonathon_H_MS_ABS.pdf: 1104261 bytes, checksum: 263341cacf057793f5c9dfba6c50c8bd (MD5) license.txt: 4813 bytes, checksum: …
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Mid-infrared optical absorption in undoped lamellar copper oxides
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1994.
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Optical absorption of bismuth silicon oxide (Bi₁₂SiO₂₀) crystals
The purpose of this work is to characterize the optical absorption in bismuth silicon oxide (Bi₁₂SiO₂₀) crystals grown using the Bridgman technique and to identify electronic transitions responsible for absorption. Optical measurements were taken in the range of 0.4 - 11 pm at 300 K and 77 K using …
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Optical Absorption and Fluorescence Studies in High Pressure Cesium-Xenonmixtures
Made available in DSpace on 2014-12-12T20:54:20Z (GMT). No. of bitstreams: 1 7616128.pdf: 2346882 bytes, checksum: 33cb6593a1122758f545e3090b1c422f (MD5) Previous issue date: 1976
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Optical absorption associated with grain boundaries in n-type germanium
The optical absorption by 40 to 25 0 grain boundaries in germanium bicrystals in the spectral region 0040 ev to Oe80 ev was measured using two modulation techniques. The first technique measured directly the difference in optical absorption between the grain boundary layer and the adjacent single …
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Electric field effects on optical absorption by excitons in semiconductors
The effect of an electric field on exciton oscillator strengths is calculated for both bound and continuum states. The calculation is performed for Wannier excitons using the effective~mass approximation at both the Mo and M3 type edges. In comparison with single-particle theory, the inclusion of …
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Optical Absorption of Pure and Mixed Silver Halides at Low Temperatures
Made available in DSpace on 2015-05-12T21:41:35Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6607758.PDF: 3807464 bytes, checksum: 51610f9199f99a42f07d03634dd58dd9 (MD5) Previous issue date: 1966
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Optical absorption of pure and mixed silver halides a low temperatures
The low level indirect optical absorption of pure AgCl and AgBr has been measured between 4.20 K and0 77 K . The corresponding indirect optical absorption of AgCl~AgBr mixed crystals has also been measured in the same temperature range. The temperature dependence of the absorption spectra of pure …
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A theoretical investigation of optical absorption intensities in transition metal complexes.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 1975
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In Situ Characterization of Optical Absorption by Carbonaceous Aerosols: Calibration and Measurement
Light absorption by aerosols has a great impact on climate change. A Photoacoustic spectrometer (PA) coupled with aerosol-based classification techniques represents an in situ method that can quantify the light absorption by aerosols in a real time, yet significant differences have been reported …
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Single molecule optical absorption at room temperature detected by scanning tunneling microscopy
… or semi-conductive surfaces. By adding laser absorption, we are able to simultaneously examine single molecules with high spatial and high energy resolution. Our method of single molecule absorption detected by scanning tunneling microscopy (SMA-STM) relies on backside illumination to cut down …
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Optical absorption and electrical conductivity of electron acceptor doped poly-3-octylthiophene films
Optical absorption and electrical conductivity measurements of solution-doped poly-3-octylthiophene (P3OT) films were studied. Chloroform solutions of P3OT were doped with the organic electron-acceptors, 2,3-dichloro-5,6-dicyano-l,4-benzoquinone (DDQ) and 7,7,8,8-tetracyanoquinodimethane (TCNQ); …
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Derivation of Trace Gas Information combining Differential Optical Absorption Spectroscopy with Radiative Transfer Modelling
The Differential Optical Absorption Spectroscopy (DOAS) is an established remote sensing technique for atmospheric constituent probing. To derive quantitative distribution data of trace gas distributions it is necessary to combine novel measurement techniques like Multi-Axis DOAS with realistic …
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Direct measure of band edge optical absorption of silicon nanostructures using photothermal deflection spectroscopy
… In this thesis, I studied the band edge optical absorption of free standing Si-NPs and Si-NPs in an amorphous silicon matrix, a composite material also known as nano-crystalline silicon (nc-Si:H). In general, it is difficult to directly observe the absorption threshold in these materials …
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Optical absorption measurements on silver halides in the ultraviolet and extreme ultraviolet energy ranges
The absorption coefficients of silver chloride and silver bromide have been determined from thin film transmission measurements in the range of photon energy from 3.5 to 6.7 electron volts and from 30 to 240 electron volts. An unusual feature of this work is the use of electron synchrotron …
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Optical absorption and anisotropy of refractory oxides fabricated by ion-assisted deposition and ion plating.
… but ion plating of titania results in films with absorption that is too high and the process is now no longer used. Ion assisted deposition of titania, however, results in high quality films. The variation in refractive index due to the columnar microstructure of these materials has been …
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The Effect of Applied Uniaxial Stresses on The Optical Absorption of F-Centers in Alkali-Halides
Made available in DSpace on 2015-05-12T21:41:34Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6511863.PDF: 4265333 bytes, checksum: eaad8854e9778a74cd6f7d76de03b912 (MD5) Previous issue date: 1965
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