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Artistic representation of a graphene–silicon image sensor array consisting of a quantum dot-sensitized graphene layer applied to a silicon CMOS chip with read-out circuitry.
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.
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.
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.
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.
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.
A nanofibre optic force transducer with 0.2 pN sensitivity is demonstrated. The set-up is used to monitor bacterial motion, observe heart cell beating and detect infrasound power in solution.
Boson sampling with three, four and five photons with high efficiency, purity and indistinguishability is realized using a quantum dot–micropillar as the single-photon source. A record-breaking sampling rate of 4.96 kHz is achieved.
A dye-sensitized solar cell that has been designed for efficient operation under indoor lighting could offer a convenient means for powering the Internet of Things.
The amplitude of a Schrödinger's cat (SC) state — superposed coherent state — is increased using a homodyne measurement. A pair of negative SC states with amplitude of 1.15 is probabilistically converted to a single positive SC state with amplitude of 1.85.
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.
