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A large-scale, low-loss and phase-stable programmable nanophotonic processor is fabricated to explore quantum transport phenomena. The signature of environment-assisted quantum transport in discrete-time systems is observed for the first time.
Exploitation of the valley electronic structure of transition metal dichalcogenides with exciton–polaritons is an elusive challenge. Now, valley-polarized exciton–polaritons in monolayers of MoS2 have been demonstrated.
The direct measurement of few-cycle optical waveforms with arbitrary polarization and weak intensity is now made possible thanks to extreme ultraviolet interferometry with isolated attosecond pulses.
New theoretical analysis predicts that the introduction of a carefully designed gain and loss profile into a scattering medium could enable the unperturbed flow of light with constant, uniform intensity.
High-speed control of polarization may lead to ultrafast modulators and help explore polarization-dependent ultrafast dynamics in matter. Now, femtosecond polarization switching is realized through intraband optical excitation in an ultrathin semiconductor layer.
The demonstration of a quantum dot-sensitized graphene image sensor that offers a very broad spectral response and that is integrated with silicon CMOS technology could potentially be a new cost-effective chip platform for hyperspectral imaging and spectroscopy.
Photonic time-stretch techniques and their applications are reviewed. The approach enables the observation of signals that are otherwise too short or rapid for conventional measurement.
An optical method for the temporal and spatial reconstruction of the electric field of few-cycle pulses is developed. The method is based on two attosecond technologies: extreme-ultraviolet interferometry and a directional electric field detector.
