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Controlling the excitation energy transfer between photosynthetic light-harvesting complexes is key for advancing artificial photosynthetic systems. Here, the authors report the enhanced excitation energy transfer between photosynthetic light-harvesting 2 complexes (LH2) mediated by an optical microcavity in both strong and weak exciton-photon coupling regimes.

'Recent developments in spectroscopy have witnessed the establishment of dual-comb techniques. In this work the authors demonstrate dual-comb photothermal spectroscopy providing gas sensing with superfine resolution and high sensitivity

Dynamic angular tuning of thermal emission is a problem in the field of thermal metasurfaces. Here, the authors make a thermal emission device using electrostatic gates, opening an avenue for radiative heat management and mid-infrared communication.

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 Casimir force is a ubiquitous interaction arising from electromagnetic quantum fluctuations. Here, the authors uncover the underlying physics governing Casimir force phase transitions in staggered 2D materials in the graphene family.

Here, the authors create a high-quality-factor chiral metasurface that enables record-high room-temperature valley-selective emission in MoSe₂ monolayers, independent of excitation polarization.

Here, the authors show that van der Waals isotopic heterostructures based on few-layer h¹⁰BN and h¹¹BN can be tuned to modulate the energy-momentum dispersions of hyperbolic phonon polaritons, offering an alternative approach to engineer the nanophotonic properties of 2D materials.

Despite recent advances with trappedion-based platforms, achieving quantum networks with link efficiency greater than unity on metropolitan scales is still a challenge. Here, the authors demonstrate a multiplexed quantum network generating heralded entanglement at a rate faster than local decoherence.

This work demonstrates the necessary building blocks to realize large-scale multiplexed quantum networking nodes in a visible thin-film lithium niobate integrated photonics platform.

Excitations of the fractional quantum Hall states are of great interest because they obey anyonic statistics, but electronic interferometers give contrasting results about their quantum coherence. Here the authors use novel two-particle time-domain interferometry to show that quantum coherence is indeed preserved.

Here, the authors generate dissipative Kerr solitons with stable repetition rates and low optical power threshold. They achieve this by actively switching the bias current of injection-locked III-V semiconductor lasers and pulse-pumping crystalline and integrated microresonators with picosecond laser pulses.

Light-matter interaction can induce changes to the properties of the system by creating hybrid collective states of light and molecular excitations, the so called polaritons. Here the authors use femtosecond pump-probe spectroscopy to explore exciton-polariton dynamics in a photosynthetic protein, light harvesting 2 complexes, and find evidence for rapid energy transfer to dark polariton states.

In this work, researchers show how laser annealing is used to create complex 2D gradients in magnetic properties, which can steer spin waves and domain walls. This fast, maskless method enables the development of next-generation computing devices.

Coherent coupling of light with electronic transitions has led to phenomena such as polariton lasing and superfluidity. Shalabney et al.now couple the optical modes of micro-cavity to the vibrational modes of a molecule at room temperature and thereby alter the chemical behaviour of the molecule.

Compact, tunable terahertz sources are highly desired for sensing and imaging applications. Here Vijayraghavan et al. demonstrate room-temperature quantum cascade laser sources based on the non-linear optical conversion of mid-infrared light that provide a tunable output over a 3.5-THz bandwidth.

Local tuning of quantum dots embedded in a photonic waveguide can be achieved through the strain produced by laser heating of a thin layer of HfO₂ deposited around the waveguide. The method is exploited to tune three quantum dots in resonance.

Time reversal symmetry breaking gives rise to magnetic circular dichroism and Faraday rotation in graphene. The authors use terahertz magneto-electro-optical spectroscopy to demonstrate that electrostatic doping at a fixed magnetic field allows inversion of magnetic circular dichroism and Faraday rotation.

The authors demonstrate fidelity colour prints and binocular stereoscopic images in multilayer MoS₂ integrated on an Au substrate, showing nanometric layer sensitivity in the Fabry-Perot resonance changed by a facile laser recipe.

Photonic circuits are a promising route to developing scalable quantum technologies, if all the necessary components can be built. Using coupled resonator optical waveguides, Takesue et al.present an on-chip single-photon buffer that can delay one photon from a pair for 150 ps while preserving entanglement.

Lasing is experimentally demonstrated in a direct bandgap GeSn alloy, grown directly onto Si(001). The authors observe a clear lasing threshold as well as linewidth narrowing at low temperatures.

Directly modulated membrane distributed reflector lasers are fabricated on a silicon carbide platform. The 3 dB bandwidth, four-level pulse-amplitude modulation speed and operating energy for transmitting one bit are 108 GHz, 256 Gbit s⁻¹ and 475 fJ, respectively.

Based on a CMOS-compatible growth process, researchers successfully demonstrate the bottom-up integration of InGaAs nanopillar lasers onto silicon chips. The resulting nanolaser offers tiny footprints and scalability, making it particularly suited to high-density optoelectronics.

A ring-cavity quantum cascade laser is demonstrated to generate soliton microcombs in the mid-infrared regime.

Dirac fermion optics leverages p-n junctions and Klein tunnelling barriers present in materials to implement complex optical functions and devices, including reflectors, collimators, and Dirac fermion microscopes. Here, the authors fabricate Dirac fermion corner reflectors using bottom-gate-defined barriers in hBN-encapsulated graphene, and demonstrate high-frequency operation.

An interferometer device is used to detect the quantum-mechanical phase that is gained when two anyons are braided around each other. The fractional value of the phase proves that these quasiparticles are neither bosons nor fermions.

The existence of the Kondo cloud is revealed by the spatially resolved characterization of the oscillations of the Kondo temperature in a Fabry–Pérot interferometer and its extent is shown to be several micrometres.

Direct measurements of pressure inside living cells can now be made non-invasively using a nanomechanical silicon chip.

A new magneto-optical material consisting of a nanostructured gold film on top of a ferromagnetic dielectric demonstrated significantly enhanced Faraday and Kerr effects.

An integrated nanoscale light-emitting diode is used as an electrically driven optical source for exciting two-dimensionally localized gap plasmon waveguides with a 0.016λ² cross-sectional area. Electrically driven subwavelength optical nanocircuits for routing, splitting and directional coupling are demonstrated in compact and relatively low-loss gap plasmon waveguide structures.

By utilizing electron-hole asymmetry in ultra-short single-walled carbon nanotube (SWCNT) transistors, McRaeet al., develop ‘two-in-one’ SWCNT quantum devices that can switch from behaving as quantum-dot transistors for holes to quantum buses for electrons by changing the transistor’s gate voltage

An interferometer device demonstrates the interference of fractional quantum Hall effect edge states. This is a big step towards braiding non-Abelian anyons.

Nonlinear dissipation is frequently observed in nanomechanical resonators, but its microscopic origin remains unclear. Here, nonlinear damping is found to be enhanced in graphene nanodrums close to internal resonance conditions, providing insights on the mechanisms at the basis of this phenomenon.

Practical implementations of quantum communication need to securely deliver information over long distances without line-of-sight. Towards this goal, Cuevas et al.use an actively stabilized interferometer to close the geometry loophole for a Bell inequality violation over 1 km of optical fibre.

An optical cavity can be used to measure fluctuations in the vacuum due to creation and annihilation of virtual particles. Using a nanohole array to control the position of probe atoms, Lee et al.map the vacuum field in two directions and combine this with spontaneous emission spectra to obtain a 3D profile.

The authors report a semiconductor injection laser with a continuous wave emission spanning more than one octave, from 1.64 THz to 3.35 THz, with optical powers in the milliwatt range and more than 80 modes above threshold.

Here the authors demonstrate the temporal control of ultrasonic wave propagation in a one-dimensional phononic crystal waveguide. Four-wave mixing experiments are implemented, providing a platform on which to realize novel nonlinear phenomena in the system.

Mid-infrared 2 μm InAs/InP quantum-dot lasers is first demonstrated, with a low threshold current density of 118 A cm⁻² per layer and a maximum operating temperature of 50 °C.

The strong electro-optic interaction, low optical loss and high microwave bandwidth of thin-film lithium niobate have enabled applications from computing to quantum information. This Review explores the fundamental principles, recent advances and the future potential of integrated lithium niobate technologies.

Magic-angle twisted bilayer graphene exhibits a wide range of phases, such as metal, insulator and superconductor states. Now local electrostatic gating devices made from this two-dimensional material platform enable highly tunable Josephson junctions, edge tunnelling spectroscopy and single-electron transistor operation.

Thin film interference is integral to modern photonics; however, it inevitably leads to an undesired change of spectral characteristics with angle. Here, the authors overcome this fundamental limit by utilizing and tuning exciton-polaritons arising in ultra-strongly coupled microcavities.

Highly sensitive trace-gas detection is possible in the mid-infrared range with transparent microresonators. Here, the authors directly measure the necessary ultra-high quality factors of microresonators made from fluoride crystal materials using a tapered chalcogenide fibre.