23 April 1998 Coherence properties of semiconductor nanostructures
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We study the coherence times of CuBr nanocrystals (quantum dots) in a borosilicate matrix under resonant excitation. Measurements are performed in two different experiments: Degenerate four-wave mixing with pulses of approximately 100 fs duration and spectral hole burning using a nanosecond excitation. Our results show a dependence of the dephasing times on the excitation intensity, and, when extrapolated to low intensity, a longer coherence time under fs than ns excitation. This result is tentatively explained as being due to spectral diffusion in the case of ns excitation.
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Roland Levy, Roland Levy, Bernd Hoenerlage, Bernd Hoenerlage, Pierre Gilliot, Pierre Gilliot, } "Coherence properties of semiconductor nanostructures", Proc. SPIE 3277, Ultrafast Phenomena in Semiconductors II, (23 April 1998); doi: 10.1117/12.306173; https://doi.org/10.1117/12.306173

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