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Infrared absorption by excitons in Cu 2 O
Author(s) -
Jörger M.,
Tsitsishvili E.,
Fleck T.,
Klingshirn C.
Publication year - 2003
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200303164
Subject(s) - exciton , absorption (acoustics) , infrared , excitation , spectroscopy , atomic physics , infrared spectroscopy , absorption spectroscopy , materials science , chemistry , physics , optics , condensed matter physics , organic chemistry , quantum mechanics
In a differential absorption experiment the induced infrared transitions from the excitonic 1s to the 2p levels in Cu 2 O have been investigated. Intermediate densities of 1s excitons were created by cw‐laser excitation while the interexcitonic 1s to 2p transitions were probed simultaneously, using Fourier spectroscopy. Our data give evidence for a surprisingly large splitting of the 2p level (≈3.7 meV) the origin of which is a matter of speculation. An analysis of lineshape and width of the transitions results in a ratio of the effective masses m 1s / m 2p which deviates from the literature value.