The Yellow Excitonic Series of Cu2O Revisited by Lyman Spectroscopy
Takeshi Tayagaki, Andre Mysyrowicz, Makoto Kuwata-Gonokami
Abstract
We report on the observation of the yellow exciton Lyman series up to the fourth term in Cu2O by time-resolved mid-infrared spectroscopy. The dependence of the oscillator strength on the principal quantum number n can be well reproduced using the hydrogenic model including an AC dielectric constant, and precise information on the electronic structure of the 1s exciton state can be obtained. A Bohr radius a1s=7.9 A and a 1s-2p transition dipole moment μ1s-2p= 4.2 eA were found.
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