Abstract
We present second-order photon correlation measurements on single InP/(Ga,In)P quantum dots as a function of temperature. Low background emission allows to obtain antibunching minima below 0.25 up to 45 K. The antibunching time increases or decreases with temperature depending on the quantum-dot size. The two trends result from a competition between hole thermal excitation and dark-to-bright exciton transitions. The former prevails in smaller dots showing increasing with temperature, while the latter dominates in larger quantum dots showing decreasing with temperature.
- Received 14 July 2009
DOI:https://doi.org/10.1103/PhysRevB.80.161305
©2009 American Physical Society