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Parametric driving of Kerr solitons – cavity soliton excitation around twice the carrier frequency of solitons – in an optical parametric oscillator with competing nonlinearities look prone to extend the applications of Kerr resonators to random number generators and Ising machines.
All-optical modulation of second-harmonic generation in a monolayer molybdenum disulfide with a modulation depth of close to 100%, and speed limited only by the fundamental pulse duration, is achieved thanks to the crystal symmetry and the deep subwavelength thickness of the sample.
Quantum noise is suppressed by a bound state in the continuum (BIC) approach, enabling a microlaser with narrow linewidth compared to other small lasers.
A terahertz phase modulator based on the switchable perturbation resonance in two-dimensional electron gas is demonstrated. Phase manipulation with precision ranging from 2° to 5° is obtained at frequencies in the range from 0.26 to 0.27 THz.
Extreme electromagnetic field confinement in polaritonic systems is demonstrated. The tight fields can excite magnetoplasmons and result in nonlocal phenomena.
A hybrid photonic–atomic device based on the integration of tapered nanoscale and mechanically suspended waveguides with hot vapour is reported, demonstrating a drastic reduction in absorption linewidth and improved vapour coherence time.
Quantum transport in fractal networks is experimentally investigated by performing continuous-time quantum walks in fractal photonic lattices. Contrarily to classical fractals, anomalous transport governed solely by the fractal dimension is observed.
Electron non-stationary tunnelling dynamics is probed by the attoclock with the two-colour phase-of-phase photoelectron spectroscopy. Contrary to the case of static tunnelling, angle-to-time mapping in attoclock is found to be not angularly uniform.
The second-harmonic spatiotemporal orbital angular momentum of an optical pulse and its space–time topological charge conservation during frequency doubling are experimentally observed, opening opportunities for nonlinear conversion and scaling of photons carrying spatiotemporal orbital angular momentum.
Structured beams of light are used to engineer conduction band populations and pattern currents. Using the approach, dynamic optoelectronic interconnects and other applications are demonstrated.
An optically synchronized precision fibre link based on two independent chip-scale cavity-stabilized stimulated Brillouin scattering lasers is demonstrated. An ultralow 3 × 10−4 rad2 residual phase error variance is achieved between the mutually coherent transmit and receive lasers.
Researchers coupled exciton–polariton modes to one another in a six-fold symmetric microcavity with loss manipulation and observed room-temperature polaritonic parity-time-reversal symmetry.
Twin-field quantum key distribution over 600 km is demonstrated. The key ingredient for success is the dual-band phase stabilization that dramatically reduce the phase fluctuations on optical fibre by more than four orders of magnitude.
Mid-infrared polarization detectors based on nanoantenna-mediated few-layer graphene are demonstrated. By tuning the orientation of nanoantennas, the polarization ratios vary from positive to negative, and cover values from 1 to ∞/−∞ then to −1.
A three-step staircase avalanche diode was demonstrated and pre-cited gain scaling was confirmed. The technology may be considered as a solid-state analogue to the photomultiplier tube.
Subcycle nano-videography of charge-transfer dynamics in WSe2/WS2 heterostructures is obtained by using a terahertz near-field microscopy. The central idea is to probe the local polarizability of electron–hole pairs with evanescent terahertz fields.