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Absolute Raman scattering cross sections of trimethylgallium and trimethylaluminum in the vapor phase

✍ Scribed by H. Sano; G. Mizutani; S. Ushioda

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
336 KB
Volume
194
Category
Article
ISSN
0009-2614

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✦ Synopsis

By using a Raman spectrometer system whose absolute sensitivity is calibrated, we have measured the absolute Raman scattering cross sections of trimethylgallium (TMG) and trimethylaluminum (TMA) in the vapor phase. The measured cross sections are (dtr/dl2)~sXM~ = 1.3 Γ— 10 -29 cm2/molecule sr line and (da/dt2)~sXMA = 2.6 Γ— 10 -29 cm2/dimer sr line for the 2912 cm-~ line of TMG and the 2900 cm-~ line of TMA, respectively. From these cross sections we can deduce that the molecular vibrations of a monolayer of TMG or TMA on a GaAs substrate should be observable by Raman scattering.

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The effect of the internal field on Rama
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## Abstract The increase in amplitude of incident and Raman scattered radiation brought about by the dielectric nature of liquids is known as the internal field effect and is responsible for increasing scattering cross section with increasing refractive index. This effect has been investigated quan