2012/05/10 by Serkan Ateş, Ates, Serkan, Imad Agha +5
Physics and Astronomy · Engineering · #Quantum optics and atomic interactions #Semiconductor Lasers and Optical Devices #Photonic and Optical Devices
paper · pdf · doi:10.48550/arxiv.1205.2218
We demonstrate background-free quantum frequency conversion of single photons from an epitaxially-grown InAs quantum dot. Single photons at ≈ 980 nm are combined with a pump laser near 1550 nm inside a periodically-poled lithium niobate (PPLN) waveguide, generating single photons at ≈ 600 nm. The large red-detuning between the pump and signal wavelengths ensures nearly background-free conversion, avoiding processes such as upconversion of anti-Stokes Raman scattered pump photons in the PPLN crystal. Second-order correlation measurements on the single photon stream are performed both before and after conversion, confirming the preservation of photon statistics during the frequency conversion process.