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Hole-filling of persistent spectral holes in the excitonic absorption band of CuBr quantum dots

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6 Author(s)
Valenta, J. ; Institut de Physique et Chimie des Matériaux de Strasbourg (UM 380046, CNRS-ULP-EHICS), Groupe d’Optique Nonlinéaire et d’Optoélectronique, 23 rue du Loess, 67037 Strasbourg Cedex 02, France ; Moniatte, J. ; Gilliot, P. ; Levy, R.
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Persistent spectral-holes (p-SH) are burned in the Z1,2 excitonic band of CuBr nanocrystals by a pulsed laser excitation. The annealing of p-SH is studied by three types of hole-filling (HF) experiments: (i) the spontaneous HF, (ii) thermally-induced HF, and (iii) the laser-induced HF. Results are compared to the well developed theory of the persistent spectral hole-burning (p-SHB) in the system of molecules in amorphous matrices. Both p-SHB and HF phenomena can be explained within the framework of a photochemical reaction like the photoionization of nanocrystals. The potential application of p-SHB to the frequency-domain optical data storage is discussed. © 1997 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:70 ,  Issue: 6 )