Single InAsP/InP quantum dots as telecommunications-band photon sources
Elvira, David · Hostein, Richard · Bruno, Fain · Monniello, Leonard · Michon, Adrien · Beaudoin, Gregoire · Braive, Remy · Robert-Philip, Isabelle · Abram, Izo · Sagnes, Isabelle · Beveratos, Alexios
Original · EN
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.
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