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A regular stream of single photons is generated from a terrylene molecule. The metallodielectric planar antenna, applied to a terrylene molecule, and the optical excitation scheme are developed to achieve intensity fluctuations 40% below the sub-shot-noise limit.
A negatively charged nitrogen–vacancy centre — a promising quantum light source — is created in diamond by laser writing (with pulses with a central wavelength of 790 nm and duration of 300 fs) with an accuracy of 200 nm in the transverse plane.
Experimental data supported by simulations indicate that the trajectories of relativistic electron bunches can be controlled at the attosecond timescale by precise adjustment of the relative phase in a two-colour field scheme. An enhancement in the harmonic yield is also reported.
Optical clocks with a record low zero-dead-time instability of 6 × 10–17 at 1 second are demonstrated in two cold-ytterbium systems. The two systems are interrogated by a shared optical local oscillator to nearly eliminate the Dick effect.
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.
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.
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.
The protein crystal growth mechanism can be changed from planar 2D nucleation growth to spiral growth by femtosecond laser ablation. By using this method, the growth rate of a hen egg-white lysozyme crystal increases from 0.3 µm per day to 3.4 µm per day.
An epi-illumination system based on microlens arrays enables field-independent imaging of multiple cells with nanoscale resolution and large field of views.
Coherent mechanical oscillations are optically driven on a metamaterial absorber that has a voltage-tunable Fano resonance. Inversely, optical damping of the mechanical resonance is also achieved.
Non-thermal ultrafast switching of the magnetization in TmFeO3 is demonstrated. Few-cycle terahertz pulses modify the magnetic anisotropy of the ordered Fe3+ spins and trigger nonlinear excitation of the amplitude of spin oscillations.
The first field test of quantum teleportation is implemented over a 30 km optical fibre network with independent quantum light sources. To establish a robust quantum teleportation system in the real world, several feedback mechanisms are developed.