Second harmonic generation in SiC polytypes

Details Second harmonic generation in SiC polytypes Second harmonic generation in SiC polytypes

1997-09-29

arxiv.org/abs/cond-mat/9709319v1

Physics

Condensed Matter

12 pages, 10 figures

Scientific paper

10.1103/PhysRevB.57.9705

LMTO calculations are presented for the frequency dependent second harmonic generation (SHG) in the polytypes 2H, 4H, 6H, 15R and 3C of SiC. All independent tensor components are calculated. The spectral features and the ratios of the 333 to 311 tensorial components are studied as a function of the degree of hexagonality. The relationship to the linear optical response and the underlying band structure are investigated. SHG is suggested to be a sensitive tool for investigating the near band edge interband excitations.

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