The optical properties of single InAsP/InP quantum dots are investigated by spectrally-resolved and time-resolved photoluminescence measurements as a function of excitation power. In the short-wavelength region (below 1.45 μm), the spectra display sharp distinct peaks resulting from the discrete electron-hole states in the dots, while in the long-wavelength range (above 1.45 μm), these sharp peaks lie on a broad spectral background. In both regions, cascade emission observed by time-resolved photoluminescence confirms that the quantum dots possess discrete exciton and multi-exciton states. Single photon emission is reported for the dots emitting at 1.3 μm through anti-bunching measurements.
@article{arxiv.1108.2439,
title = {Single InAsP/InP quantum dots as telecommunications-band photon sources},
author = {David Elvira and Richard Hostein and Fain Bruno and Leonard Monniello and Adrien Michon and Gregoire Beaudoin and Remy Braive and Isabelle Robert-Philip and Izo Abram and Isabelle Sagnes and Alexios Beveratos},
journal= {arXiv preprint arXiv:1108.2439},
year = {2015}
}