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摘要
The ultrafast decays of CdSexTe1-x (x = 0.32) quantum dots in the glass matrix were reported by use of one-color pump probe experiments. The size varies from 7.8 to 22 nm, has a longer rising time and a much longer lifetime. Obvious coherent phonons and electronic decays of CdSexTe1-x quantum dots (R = 3.9 nm) are found with the excitation of band-edge energy, but only long electronic decays of CdSexTe1-x quantum dots (R = 5.3, 11.0 nm) are observed. Coherent phonon is attributed to resonant excitation because of Frohlich coupling. The component with long lifetime under non-resonant excitation originated from heat accumulation.
- 出版日期2013-12-15
- 单位黑龙江大学
