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A fingertip-sized on-chip optomechanical device offers a controllable way to shift the frequency of single photons in the telecom band while preserving their quantum information.
Research groups around the world are rushing to combine perovskites with silicon or other materials in an attempt to make tandem solar cells that promise unprecedented device efficiencies.
The combination of whispering-gallery-mode sensing with photothermal absorption spectroscopy promises significant advances in single-molecule identification.
Octane droplets in water can resonate both capillary and optical modes. Researchers have now exploited such cavities and observed optically controlled stimulated capillary scattering and coherent excitation of capillary resonances.
Carrier-envelope-phase-controlled single-cycle terahertz pulses can induce coherent electron tunnelling either from a Pt/Ir nanotip to a graphite sample or vice versa. The pulses enable ultrafast nonlinear manipulation of electrons at the atomic scale.
An optomechanical single-photon frequency shifter is demonstrated in integrated AlN waveguides. A frequency shift up to 150 GHz is achieved at telecom wavelength. The device shows near-unity efficiency and preserves the quantum coherence.
Spatial beam clean-up and spatiotemporal modulation instability in graded-index multimode fibres are studied in a regime characterized by disorder, nonlinearity and dissipation.
The combination of black silicon to improve the light absorption and negatively charged alumina to form an induced collecting junction characterizes a photodiode with external quantum efficiency above 96% between 250 nm and 950 nm.
Polarization-entangled photons are generated from light-emitting diodes based on site-controlled pyramidal quantum dots. Selective current injection into the vicinity of a quantum dot becomes possible owing to a self-assembled vertical quantum wire.
Single-particle double-modulation absorption spectrometers based on whispering-gallery-mode microresonators achieve sub-100-Hz sensitivity to photothermal resonance shifts and allow for the study of arrays of Fano resonances in the context of plasmonic–photonic hybridization.
A flexible and wearable terahertz scanner based on carbon nanotubes is demonstrated at room temperature over a frequency range 0.14 THz to 39 THz. The terahertz photothermoelectricity is enhanced by using different electrode materials.
