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- W2015295489 abstract "We present a model which describes excitonic polariton effect for direct gap semiconductors where the valence band is degenerate, so that two (“light” and “heavy”) exciton dispersion curves exist and give rise to three polariton branches. It is shown that the quantity δ = Δ − 13ELT is an important parameter in this case, Δ and ELT being respectively the exchange energy and the longitudinal transverse splitting. A comparison with the available data, extracted from Resonant Brillouin Scattering in GaAs, is carried out. It is shown that when only the uppermost and lowest polariton branches can be detected, the measured separation Δexp between these two branches is equal to the longitudinal transverse splitting with a good approximation. In the general case the exact relation between Δ, ELT and Δexp is derived." @default.
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- W2015295489 date "1978-09-01" @default.
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- W2015295489 title "Polariton effect in degenerate valence band semiconductors" @default.
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- W2015295489 doi "https://doi.org/10.1016/0038-1098(78)91119-5" @default.
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