Single InAsP/InP quantum dots as telecommunications-band photon sources

Details Single InAsP/InP quantum dots as telecommunications-band photon sources Single InAsP/InP quantum dots as telecommunications-band photon sources

2011-08-11

arxiv.org/abs/1108.2439v1

Physics

Condensed Matter

Materials Science

Scientific paper

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 $\mu$m), 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 $\mu$m), 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 $\mu$m through anti-bunching measurements.

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