Breakdown of the k -Conservation Rule in Si Nanocrystals

@inproceedings{Kovalev1998BreakdownOT,
  title={Breakdown of the k -Conservation Rule in Si Nanocrystals},
  author={Dmitry Kovalev and H. Heckler and Moshe Ben-Chorin and G. Polisski and Michael Schwartzkopff and F. Koch},
  year={1998}
}
We show that light emission from different systems of silicon nanocrystals does behave as expected for indirect-band-gap quantum dots. Photoluminescence excited on the low energy part of the distribution of Si nanocrystals exhibits a set of narrow peaks associated with Si TA and TO momentum-conserving phonon-assisted optical transitions. These spectra allow us to determine the ratio of no-phonon transitions to TA and TO phonon-assisted processes over a wide range of confinement energies. The… CONTINUE READING

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