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Comparative determination of absolute Raman scattering efficiencies and application to GaN

✍ Scribed by I. Loa; S. Gronemeyer; C. Thomsen; O. Ambacher; D. Schikora; D. J. As

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
317 KB
Volume
29
Category
Article
ISSN
0377-0486

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✦ Synopsis

Absolute Raman scattering efficiencies for Ðrst-order light scattering of optical zone-center phonons were determined for cubic and hexagonal GaN. An improved method for the determination of scattering efficiencies by comparative measurement with a standard substance such as was used to minimize the experimental errors BaF 2 substantially.

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## Abstract Doping nematic liquid crystals with nonracemic chiral compounds induces a twisted nematic (cholesteric) phase. The ability of solutes to twist the nematic phase may be related to the overall shape of the chiral dopant and consequently to its absolute configuration. The cholesteric induc