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The non-invasive control of light based on incoherent emission from multiple target positions can be achieved by retrieving mutually incoherent scattered fields from speckle patterns, and then time-reversing scattered fluorescence with digital phase conjugation.
Tailoring the composition of organic cations enables manipulating the recombination rates of perovskites. Optimized solution-processed perovskite emitters fabricated on silicon exhibit up to 42.6-MHz modulation bandwidth and 50-Mbps data rate.
The intrinsic random amplitude and phase modulation of 40 distinct lines of a microresonator frequency comb operated in the modulation instability regime are used to realize massively parallel random-modulation continuous-wave light detection and ranging, without requiring any electro-optical modulator or microwave synthesizer.
Energy consumption and compute density are challenges for computing systems. Here researchers show an optical computing architecture using micrometre-scale VCSEL transmitter arrays enabling 7 fJ energy per operation and a potential compute density of 6 tera-operations mm−2 s−1.
This work reports an inverse design approach that can spectrally shape Kerr microcombs by imprinting a nanophotonic dispersion filter to a microresonator to engineer solitonic frequency-comb states in the resonator with an optimization algorithm.
By engineering the plasmonic response of a nanopatterned silver gate electrode, the radiative decay rate of excitons in a tungsten disulfide monolayer can be enhanced via the Purcell effect, creating high modulation efficiencies at room temperature.
When near-infrared femtosecond laser pulses are focused onto a metal wire, relativistic electron acceleration is observed in the attached waveguide. An electron energy gain of 1.1 MeV and an effective acceleration gradient up to 210 MV m−1 are achieved using the laser-induced terahertz surface waves.
Employing a lattice-matched perovskite oxide as an electron transport layer allows optimizing the buried interface in perovskite solar cells. A maximum power conversion efficiency of 25.17% is achieved. Cells with an initial power conversion efficiency of 24.4% maintain 90% efficiency after operation for 1,000 h.
Strong coupling of a 2D hole gas in the quantum Hall state dressed with a microcavity mode is studied, showing that tuning the strength of the magnetic field, and therefore the density of states in the system, can select specific spin-dependent light–matter coupling.
Spatial-frequency tracking adaptive beacon light-field encoded endoscopy enables imaging through a single multimode fibre under bending and twisting. In vivo imaging with subcellular resolution is demonstrated in mice models.
Researchers design and demonstrate a scalable yet compact chip-based link architecture that may enable terabit-scale optical interconnects for hyperscale data centres.
Photonic radar is exploited for non-contact vital sign detection with a demonstration on a cane toad with a view to application in humans. Optical signals generated from the system are also explored for LiDAR-based vital sign detection, which may yield improved accuracy and system robustness.
Two-photon excitation with mid- and near-infrared pulses encodes bond selectivity in fluorescence imaging. Single-molecule imaging and spectroscopy is demonstrated on individual fluorophores as well as various labelled biological targets.
Large perovskite nanocrystals are synthesized to increase the cryogenic exciton radiative rate. At liquid helium temperatures, single photons from perovskite nanocrystals coalesce at a beam splitter, signalling the existence of indistinguishable photon emission.
A special-purpose quantum simulator, based on a coherently controlled broadband quantum frequency comb produced in a chip-scale dynamically modulated monolithic lithium niobate microresonator, is demonstrated, opening paths for chip-scale implementation of large-scale analogue quantum simulation and computation in the time–frequency domain.
An optoelectronic synapse is realized by incorporating a photoactive layer in an organic electrochemical transistor. Writing and erasing multiple conductance states allow optical signals to be recognized and the learning process of the human brain to be mimicked.
An integrated electro-optic isolator on thin-film lithium niobate enables non-reciprocal isolation by microwave-driven travelling-wave phase modulation. The isolator exhibits a maximum optical isolation of 48.0 dB at around 1,553 nm and an on-chip insertion loss of 0.5 dB.
A deterministic single-photon two-qubit SWAP gate between polarization and spatial-momentum is demonstrated on a silicon chip. A two-qubit swapping process fidelity of 94.9% is obtained. The coherence preservation of the SWAP gate process is verified by two-photon interference.
A common belief about boson bunching—fully indistinguishable bosons exhibit the utmost bunching—is theoretically disproved with seven photons of distinct polarization in a seven-mode interferometric process. Enhanced bunching could thus be observed with partially distinguishable photons.
Super-resolution imaging based on autocorrelation with two-step deconvolution (SACD) enables recording super-resolution images with 128-nm spatial resolution over a field of view of 2.0 mm × 1.4 mm within a 10-min acquisition time.
