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Coating additive solutions onto wet perovskite films in situ enables flexible all-perovskite tandem solar cells with a certified power conversion efficiency of 23.0% for a module with an aperture area of 20.26 cm2. The modules maintain 97% of their initial efficiency after 10,000 bending cycles with a 10 mm radius.
A dual-gated moiré superlattice device made of trilayer WSe2/WS2/WSe2 enables controlling quadrupolar excitons by driving quadrupolar-to-dipolar exciton transitions via tuning the excitation intensity and doping.
Triangle-beam interference structured illumination microscopy leverages radially polarized beams to generate two-dimensional lattice illumination patterns. The technique enables a temporal resolution of 242 Hz, spatial resolution of 100 nm and continuous imaging of neuronal growth for up to 13 h.
Researchers generated 16.7 nm wavelength extreme-ultraviolet Poincaré beams at the FERMI free electron laser without relying on optical elements. The method of in situ Poincaré beam production in free electron lasers enables straightforward flexibility in the orientation and balance of polarization states, and can be extended to other vector beams and to shorter wavelengths.
A fluidic system with spatially reconfigurable hot spots generated by optical pumping of plasmonic nanorods is demonstrated, creating virtual barriers by generating local heating via photothermal conversion, for potential applications in chemical synthesis, lab-on-chip devices and microbiology.
A wide-field microscope capable of simultaneously measuring circular dichroism and circular birefringence signals over wide fields of view of the order of hundreds of micrometres is demonstrated, addressing the challenge of spatially resolving chiral heterogeneity in materials and biomolecules.
An ultra-thin mixed-reality (MR) display design that is based on a unique combination of waveguide holography and artificial intelligence-driven holography algorithms is demonstrated, creating visually comfortable and perceptually realistic 3D VR experiences in a compact wearable device.
A new p-type small molecule enhances defect passivation and improves interfacial charge transport in perovskite solar cells, enabling devices with a certified power conversion efficiency of 26.72%, 97% of which is maintained after 2,500 h of continuous operation.
A broadband cascaded amplification scheme enables the generation of intense near-single-cycle pulses with excellent temporal contrast and waveform control.
A high-peak-power low-duty-cycle pulsed fibre laser enables stimulated Brillouin scattering microscopy with pixel dwell times as low as 0.2 ms and spatial resolution as low as 500 nm and 2 μm in the lateral and axial directions, respectively.
A new platinum(ii)-based emitter features suppressed intermolecular interactions, enhanced molecular rigidity and locally excited character, enabling narrowband blue phosphorescent OLEDs emitting at 464 nm with a full-width at half-maximum of 17.1 nm and an external quantum efficiency of 30.8% at a luminance of 1,000 cd m−2.
CrSBr, a van der Waals antiferromagnetic semiconductor, is used to fabricate photonic crystal slabs, featuring exceptional in situ control over optical behaviour and thus enabling precise manipulation of photonic modes at near-visible and infrared wavelengths.
The researchers demonstrate direct measurement and complete characterization of structured electronic wave packets created within a prototypical Fano resonance. The method may be broadly applicable to the study of ultrafast processes, especially electronic ones, in complex systems, as well as coherent control of such systems on their fundamental timescales.
A single-shot full-vector-field measurement technique for intense, ultrashort laser pulses is studied, demonstrating the approach on systems ranging from high-repetition-rate oscillators to petawatt-class lasers.
Exploiting resonant quantum electron tunnelling empowered by an optically resonant, doubly periodic plasmonic nanowire metasurface, a biosensor with no external light source is demonstrated, boosting the integrability of the biosensor.
A temperature-controlled vacuum quenching method enables the fabrication of perovskite solar modules with a power conversion efficiency of 22.69% and an area of 11.7 cm2, while the corresponding cells maintain over 93% of their initial efficiency after 3,500 h of operation.
A platform based on quantum-emitter-embedded metasurfaces with a microcavity that can be tuned by a micro-electromechanical system is demonstrated, enabling dynamic photon emission with narrow bandwidth, ångström-level wavelength tunability and polarization switching.
Attosecond transient reflection spectroscopy is used to experimentally observe the attosecond electron dynamics of a crystalline diamond, showing that virtual interband transitions affect the timing and adiabaticity of the crystal response and thus providing insights for the development of information processing and petahertz electronics.
