Recent advances in sub-wavelength nanosale platforms have afforded the control of light from first principles, with impact to ultrafast sciences, optoelectronic and precision measurements.In this talk I will highlight two examples where emerging microscale architectures can make a dfference.First, he described recent advances in chip-scale Kerr frequency comb oscillators, where we have achieved sub-100-fs pulse mode-locking, one of the shortest pulse Kerr comb to date.Coherent mode-locking is observed in the normal dispersion regime, verified by phase-resolved ultrafast spectroscopy at sub-100-attojoule sensitivities.Soiton mode-locking and crystals, graphene-controlled optical frequency combs, and coherent THz sources will be discussed.
Second, he described our studies on quantum entanglement for dense secure communications, based on high-dimensional biphoton frequency combs.Working with time-and frequency-bins, we demonstrate quantum revival of Hong-Ou-Mandel second-order correlation of the qubits.Long postulated by theorists more than a decadeago, we experimentally demonstrate up to 19 dimensions and with visibifities up to 96.5%.The phase-locked high-dimensional qudit state is further witnessed through two non-local stabilized interferometers-in a Frans on-type configuration -as a generalized Bell's inequafity test of hyperentanglement through multiple degrees-of-freedom. Entanglement revivals of the non-local interference at discrete time-bins are uncovered for the first time, up to 97.8% visibility, as a fundamental resource for dense secure information processing.
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AuthorIEEE IPS Singapore Chapter Archives
October 2019
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