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Optical line-shape and the time-domain photon echo measurement in semiconductor quantum dots |
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| Authors: | K Kr l Z Kh s C Y Lin and S H Lin |
| Institution: | a Institute of Physics, Academy of Sciences of Czech Republic, Na Slovance 2, 18221 Prague 8, Czech Republic b National Chung Hsing University, Taichung, Taiwan, ROC c Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan, ROC |
| Abstract: | It is shown theoretically that, because of the characteristic line-shape of the electronic spectral density, the experimental photon-echo signal, giving the dephasing of the electronic state of a quantum dot, should be modulated in time quasi-periodically. This suggestion is demonstrated numerically for the case of InAs quantum dots for several temperatures of the sample. A comparison with the recent experiments on CdSe nanocrystals is presented. The theoretical argumentation is based on the recent theoretical calculation of the homogeneous optical line-shape based on the multiple electron–LO–phonon scattering in quantum dots. |
| Keywords: | Quantum dots Nanoparticles Line-shape Line-width Optical transitions |
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