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

Autor:	Donald C. Reynolds, Satoru Adachi, Kouji Hazu, T. Sota, K. Torii, Cole W. Litton, Shigefusa F. Chichibu, G. Cantwell
Rok vydání:	2004
Předmět:	Condensed Matter::Quantum Gases Physics Condensed matter physics Condensed Matter::Other Oscillator strength Exciton Binding energy Physics::Optics General Physics and Astronomy Molecular physics Dispersion (optics) Polariton Phase conjugation Biexciton Mixing (physics)
Zdroj:	Journal of Applied Physics. 95:5498-5501
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.1710727
Popis:	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.
Databáze:	OpenAIRE
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