Impact of the k -linear term on nonlinear optical response of the C-exciton manifold in ZnO

Time-integrated and spectrally resolved four-wave mixing (FWM) has been applied to study the impact of the k-linear term on nonlinear optical response of the C-exciton manifold in ZnO. From the excitation wavelength dependence of the FWM signal, we have found possible evidence that the mixing of the...

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Bibliographic Details
Published in:Journal of applied physics 2004-05, Vol.95 (10), p.5498-5501
Main Authors: Hazu, K., Torii, K., Sota, T., Adachi, S., Chichibu, SF, Cantwell, G., Reynolds, D. C., Litton, C. W.
Format: Article
Language:English
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Summary:Time-integrated and spectrally resolved four-wave mixing (FWM) has been applied to study the impact of the k-linear term on nonlinear optical response of the C-exciton manifold in ZnO. From the excitation wavelength dependence of the FWM signal, we have found possible evidence that the mixing of the Γ1 and Γ5L states leads to a three-branch excitonic polariton dispersion but the oscillator strength transfer is small. The energy separation between the lower polariton branch and the extra branch due to the k-linear term has been found to be 3.5 meV. In addition, a binding energy of biexcitons consisting of two C excitons of 1.4 meV has been obtained.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1710727