Free-Carrier Plasmons as a Novel Tool in Semiconductor Physics
W. Szuszkiewicz
Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warszawa, Poland

W. Bardyszewski
Institute of Theoretical Physics, Warsaw University, Warsaw, Poland

Qian Dingrong, Zhang Jiaming
Shanghai Institute of Technical Physics, Academia Sinica, Shanghai, China

C. Julien, M. Balkanski
Laboratoire de Physique des Solides, Université Paris VI, Paris, France

B. Witkowska and A. Mycielski
Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
(Received: August 8, 1990)
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It is demonstrated that free-carrier plasmons, being well defined collective excitations of the electron gas in the range of small wave vectors, can serve as a sensitive tool to investigate the optical processes related to the small momentum transfers. As an example the system HgSe:Fe is analysed both experimentally and theoretically.
DOI: 10.12693/APhysPolA.79.141
PACS numbers: 71.45.Gm, 72.30.+q, 75.50.Pp