A systematic study of the interaction of surface plasmons with surface optical phonons is made for 111-V group polar semiconductors t o find the factors which can influence the coupling between the two modes of vibrations. It is found that the extent of coupling depends upon the Szigeti effective charge or the ionicity of the compound.Um die Fsktoren zu finden, die die Kopplung zwischen den beiden Schwingungsmoden beeinflnssen, wird eine systematische Untersuchung der Wechselwirkung von Oberflachenplasmonen mit optischen Oberflachenphononen fur polare 111-V-Halbleiter durchgefiihrt. Es wird gefunden, da8 das AusmaB der Kopplung von der effektiven Szigeti-Lrtdung oder der Ionizitat der Verbindung abhangt.
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