To take advantage of the time-frequency degree of freedom for downconverted photons, it is important to be able to attack them where they live. This can be accomplished by controlling their housing, shaping their spectrum to something close to a binned encoding, using unbalanced interferometers or cavity techniques. The alternative is to leave them in […]
A clean, clear look at time-frequency entanglement
Want high-purity single photons, but with control over their temporal shape? A result from our collaboration with Marco Barbieri’s group at University Rome Tre, Heralded generation of high-purity ultrashort single photons in programmable temporal shapes, explains how, and is now published in Optics Express. One of the bigger limitations of downconverted photon pairs is their tendency […]
Happy to say that, after a while in the pipes, the result of a collaboration between the IQO group at UPaderborn and the Bayer group at TU Dortmund, Streak-camera measurements of single photons at telecom wavelength, has been published in Applied Physics Letters. In this experiment, we took photons from a downconversion source and upconverted them in […]
John M. Donohue 