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In this talk, I will discuss two applications of nonlinear quantum photonics in silicon nanowires: correlated photon pair sources and a single-photon wavelength converter. Correlated photon pairs can be generated in a nonlinear silicon waveguide through the spontaneous four-wave mixing (SFWM) process shown in Fig. 1(a), where two photons from a bright pump laser are annihilated, and a two photons...
We demonstrate heralded single photon source on a silicon photonic chip by a pump interleaving technique. We have achieved 90±5% enhancement to single photon rate with only 14±2% reduction in quantum signal to noise ratio.
Bright sources of on-demand single photons are a fundamental resource [1], required for linear optical quantum computing and quantum communication. Heralded single photon sources are based on photon-pair generation in nonlinear optical media, such as χ(2) crystals and χ(3) waveguides [2,3], where one photon in the pair is detected to herald the existance of the remaining photon. The number of photon...
We experimentally demonstrate a 10 times enhancement to the coincidence-to-accidental ratio of a correlated photon-pair source from a chalcogenide Ge11.5As24Se64.5 nanowire. This improvement is enabled by the low-Raman window of the device.
We report the measurements of one-photon and two-photon interference of light scattered by two quantum dots, separated by 40 μm. We show how fringe contrasts are strongly affected by spectral diffusion.
We spectrally resolve the light scattered by a single InAs semiconductor quantum dot and analyze the relative contribution of elastic and inelastic scattering processes.
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