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High-harmonic spectroscopy is employed to investigate the electron–phonon, anharmonic phonon–phonon coupling, and their relaxation dynamics in solids. It reveals the maximum displacement of neighbouring oxygen atoms in α-quartz crystal to tens of picometres in real space.

By measuring the Brillouin gain only at mechanical frequencies of interest, Brillouin gain microscopy enables Brillouin imaging with a temporal resolution of 100 µs with excitation energies of 23 µJ on biological samples.

A fully hybrid integrated erbium-doped photonic integrated waveguide laser with wide tuning of 40 nm, side-mode suppression ratio of >70 dB and output power up to 17 mW is demonstrated, achieving not only footprint reduction but also the long-anticipated fibre-laser coherence.

Researchers show that atom-like dipoles based on germanium vacancy centres in diamond may be useful as antennas, exhibiting million-fold near-field optical intensity enhancement. These antennas are used to detect and control the charge state of nearby carbon vacancies.

Ultrafast optical experiments using narrow-bandwidth tunable IR laser pulses enable nonvolatile all-optical switching of ferroelectric polarization in BaTiO₃ in the epsilon-near-zero regime.

Fluorescence super-resolution microscopy continues to offer new prospects and opportunities to tackle biological questions.

Nanofabricated strained photonic crystals in silicon platforms enable the formation of photonic Landau levels at telecommunication wavelengths, with broad potential applications for enhanced light–matter interactions on-chip.

Advancements in laser-driven ceramic phosphors yield a high-power broadband near-infrared light source which suits applications in next-generation spectroscopy.

We had all been wondering “where is Costas?” and now we learned that we shall not see him again. We have lost a good friend and leader in the photonics community.

Perovskite zinc sulphide phosphors in perovskite-based alternating-current electroluminescent devices are employed as skin-wearable devices with high stretchability, monochromaticity and power efficiency.

Owing to spectral long-range correlation, broadband energy can be delivered to extended targets deep inside a multiple-scattering system, greatly broadening the scope of controlling wave transport in disordered systems.

The position and emission wavelengths of single quantum dots embedded in a one-dimensional planar cavity can be simultaneously determined from a single photoluminescence image with 15 nm spatial accuracy and subnanometric spectral accuracy in the near-infrared.

Exploiting the interactions between bright excitons and free carriers in an atomically thin semiconductor of trilayer tungsten diselenide WSe₂ results in Fermi polarons that exhibit unusually large nonlinearity.

A terahertz-driven photogun with field gradients of 3 GV m⁻¹ is demonstrated by using a few microjoules of single-cycle terahertz radiation. The emitted electrons are accelerated up to 14 keV and can be focused down to 90 μm. The electron bunch is further compressed to 167 fs.

Terawatt-scale, sub-femtosecond, soft X-ray pulses have been demonstrated at the Linac Coherent Light Source using a superradiant cascaded amplification approach.

Photonics West 2024 showcases a robust and growing photonics industry, as the field of silicon photonics works towards sustainable growth.

Andrew M. Weiner, a luminary in ultrafast optics and quantum photonics passed away on February 13, 2024, at the age of 65. He will be remembered for his profound contributions to the optics and photonics community, engineering, education, and for his devoted mentorship. He leaves behind a legacy of innovation and inspiration.

A ring laser gyroscope, located at the Geodetic Observatory Wettzell in Southern Germany, measures variations in the Earth’s rotation. Nature Photonics spoke to a key researcher on the project, Ulrich Schreiber, about the system’s birth, teething issues, and how it may one day probe the El Niño effect.