Ultrafast Vibrationally-Induced Dephasing of Electronic Excitations in PbSe Quantum Dots

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Hideyuki Kamisaka; Svetlana V. Kilina; Koichi Yamashita; Oleg V. Prezhdo

2006

Scholarcy highlights

  • The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online
  • Induced pure-dephasing of electronic states in PbSe quantum dots at room temperature is investigated using two independent theoretical approaches based on the optical response function and semiclassical formalisms
  • Because dephasing slows down with increasing cluster size, the dephasing times calculated for the small clusters correspond to the lower end of the experimental data
  • The dephasing time is roughly proportional to the square root of the mass of the lighter atom, suggesting that dephasing should be faster in PbS and slower in PbTe relative to PbSe
  • Because the electron−phonon coupling in PbSe QDs is relatively weak compared to other semiconductor nanocrystals, fast vibrationally induced dephasing can be expected in semiconductor QDs in general
  • The Journal of Chemical Physics2007,126 , 204108

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