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Scientists propose and experimentally demonstrate a new architecture for dual-comb spectroscopy based on all-fibre tunable frequency comb sources using standard telecommunication fibre optics components, opening the way for practical dual-comb spectroscopy.
Using a controllably small and local optomechanical perturbation introduced by a focused lithium-ion beam it is now possible to map five modes of a silicon microdisk resonator (Q ≥ 20,000) with high spatial and spectral resolution.
Scientists demonstrate an experimental method that allows them to locate and track moving targets that are hidden from the direct line of sight, for example, by a wall or an obstacle, with only a few seconds acquisition time and centimetre precision.
Two-photon Rabi oscillations are observed in He on a timescale of 10 fs by utilizing the strong-field phenomenon known as Freeman resonance. The importance of ponderomotive shifts of both the Rydberg states and the ionization limit is highlighted.
A single photon is deterministically extracted from a light pulse due to the interaction of the pulse with a single 87Rb atom coupled to a nanofibre-coupled microresonator. The extraction mechanism is insensitive to pulse shape and timing.
Scientists theoretically and experimentally demonstrate that the transformation of spin into orbital momentum can lead to a fundamentally new type of force acting transversally to the direction of propagation.
A compact source that generates sub-two-cycle-duration pulses with an average power of 0.1 W spanning 6.8–16.4 μm combines the properties of power scalability, high repetition rate and phase coherence for the first time in this spectral region.
Time-domain interferometry and near-field scanning microscopy are used to investigate infrared phonon polaritons exhibiting hyperbolic dispersion. Negative phase velocity and group velocity as small as 0.002c are confirmed.
Using a leaky-wave antenna, free-space-to-waveguide frequency-division multiplexing and demultiplexing are demonstrated in the terahertz range. Both the frequency and the spectral bandwidth of multiplexed channels can be independently controlled.
A hybrid nano-optomechanical system — a nanodiamond levitated in an optical dipole trap that contains a single nitrogen vacancy centre — shows the ability to simultaneously control multidimensional optical, phononic and spin degrees of freedom.