Spin flip from dark to bright states in InP quantum dots

Details Spin flip from dark to bright states in InP quantum dots Spin flip from dark to bright states in InP quantum dots

2003-10-08

arxiv.org/abs/cond-mat/0310191v1

Physics

Condensed Matter

3 figures

Scientific paper

10.1103/PhysRevB.70.115329

We report measurements of the time for spin flip from dark (non-light emitting) exciton states in quantum dots to bright (light emitting) exciton states in InP quantum dots. Dark excitons are created by two-photon excitation by an ultrafast laser. The time for spin flip between dark and bright states is found to be approximately 200 ps, independent of density and temperature below 70 K. This is much shorter than observed in other quantum dot systems. The rate of decay of the luminescence intensity, approximately 300 ps, is not simply equal to the radiative decay rate from the bright states, because the rate of decay is limited by the rate of conversion from dark excitons into bright excitons. The dependence of the luminescence decay time on the spin flip time is a general effect that applies to many experiments.

Affiliated with

Also associated with

No associations

Rating

Spin flip from dark to bright states in InP quantum dots does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spin flip from dark to bright states in InP quantum dots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin flip from dark to bright states in InP quantum dots will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-446913