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By employing electro-optic phase modulation, a time-lens imaging system is demonstrated for single-photon pulses. Such a system achieves wavelength-preserving sixfold bandwidth compression of single-photon states in the near-infrared spectral region.
Ultralow-noise microwave signals are generated at 12 GHz by a low-noise fibre-based frequency comb and cutting-edge photodetection techniques. The microwave signals have a fractional frequency stability below 6.5 × 10–16 at 1 s and a timing noise floor below 41 zs Hz–1/2.
Rabi oscillations with a decay time of 26.7 μs are observed in a system comprising the electron spins in a diamond nitrogen–vacancy centre and a superconducting microwave cavity. Such oscillations are achieved by engineering the spectral hole burning of the spin ensemble.
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.
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.
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.
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.
A time-averaged intensity distribution of terahertz waves is imaged by converting terahertz waves to optical fluorescence. The conversion becomes possible by exciting Cs atoms to a Rydberg state. The image acquisition time is 40 ms.
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.
Radiation pressure is not the only way to push or pull matter and drive light–matter interactions. Optomechanical devices can now be driven thermoelastically and amplification with acoustic-laser-like behaviour has been observed.