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Researchers show that up-conversion in manganese-doped CdSe colloidal quantum dots enables efficient electron photoemission. The effect is exploited for high-yield production of solvated electrons, demonstrating photochemistry applicability.
Researchers demonstrate non-reciprocal amplification of nanofibre-guided light using Raman gain provided by nearby spin-polarized atoms. The direction of amplification can be controlled via the atomic spin state.
A photon-number Bell state is generated from a quantum dot by controlling the light–matter entanglement during spontaneous emission. This excitation protocol can be scaled up by using N consecutive π-pulses to deliver multimode photonic entanglement.
Superfluorescence—the collective emission of fluorescent light—is observed at temperatures up to 330 K in lead halide perovskite thin films. This finding suggests an intrinsic mechanism for protecting the electronic coherence in these materials.
Non-Abelian braiding—a candidate for realizing quantum logics—is demonstrated by controlling the geometric-phase matrix in a photonic chip, and its key characteristics are observed.
Researchers use spin-charge coupling and FePS3 crystals to induce large in-plane optical anisotropy and near-unity linear dichroism in the visible–near-infrared range.
A quantum-optical memristor is realized by means of a laser-written integrated photonic circuit. The memristive dynamics of the device is fully characterized. A memristor-based quantum reservoir computer is proposed as a possible application.
Chiral phonons—long-range lattice vibrations with rotational motion of atoms—are observed by terahertz chiroptical spectroscopy in biocrystals. Terahertz circular dichroism peaks between 0.2 and 2.0 THz clearly identify the chirality of these phonons in various microcrystalline and nanofibrils of biomolecules.
Researchers demonstrate electrically controllable chirality by exploiting doping-dependent valley polarization of excitonic states in monolayer tungsten diselenide.
Chiral liquid-crystal materials with optical properties that can be tuned, erased and reversed offer new opportunities in labelling, displays and anti-counterfeiting.
The demonstration of high-efficiency coherent microwave-to-optics conversion could push atomic transducers closer to practical applications in quantum technologies.
A photonic anomalous Floquet insulator is emulated in a silicon photonic chip. Up to four-photon topologically protected entangled states are generated in a monolithically integrated emitter in ambient conditions through four-wave mixing on top of the edge modes of the insulator.
Attosecond-gated interferometry is developed by combining sub-cycle temporal gating and extreme-ultraviolet interferometry. By measuring the electron’s relative phase and amplitude under a tunnelling barrier, the quantum nature of the electronic wavepacket is identified.