Frequency Down-Conversion to Telecom Wavelengths of On-Demand Indistinguishable Single Photons from a Quantum Dot

This project is aiming to realize the world’s brightest on-demand telecom wavelength source of single photons. This will be achieved by frequency down-conversion of single photons, emitted on-demand from a single InGaAs quantum dot at 950 nm wavelength, to the telecom C-band (1550 nm wavelength) using periodically poled lithium niobate (PPLN) crystals for difference of frequency generation. Success will enable ground-breaking next generation quantum communication technology demonstrations, including experiments in hybrid single photon entanglement and teleportation, and quantum digital signatures and QKD.

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