Abstract
AbstractNearly background free 1.5‐μm single‐photon source has been demonstrated using quasiresonant pulsed excitation. We performed a micro‐photoluminescence excitation together with photon‐correlation experiments, and then we compared photon statistics in nonresonant and quasiresonant excitation case. When we tuned the pump laser to the quasiresonant state which is 18.6 meV higher than the ground state excitonic transmission, almost background‐free luminescence was found at 1524.3 nm. The second‐order correlation function at time delay of zero, g(2)(0), was reduced to 0.017 when we carefully estimated noise contributions of after‐pulses and dark counts in InGaAs APD detectors. This result opens up the possibility of promoting high quality single‐photon source at telecommunication wavelength. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
