A quantum-to-quantum Bernoulli factory is demonstrated by using a reconfigurable Clements’s squared unitary circuit in an integrated quantum photonic platform. Three interferometer designs are proposed for the basic operations of a field on qubit states.

The introduction of 3TPYMB, an n-type molecule into inverted perovskite solar cells, enables a power conversion efficiency of 25.6%, with devices maintaining up to 98% of the initial efficiency after 1,800 h of operation.

Generalizing the ‘Kerr-induced synchronization’ concept by means of tailoring the synchronization at arbitrary modes allows to lock and control the repetition rate of a dissipative Kerr soliton frequency comb generated in a silicon nitride microring resonator.

A nonlinear nanophotonic resonator is used to spectrally translate an electro-optic frequency comb to a controllable set of wavelengths between 600 nm and 1,050 nm, with comb properties that are advantageous for high-resolution spectroscopy preserved.

By incorporating time-programmable frequency combs, free-form dual-comb spectroscopy enables compressive sensing at factors of up to 155, with a corresponding reduction in acquisition time without sacrificing spectral resolution.

Two chiral enantiomers, R- and S-BBTI, are found to efficiently emit near-infrared circularly polarized phosphorescence with a large dissymmetry factor of 0.013 in dilute solutions.

The mitigation of climate change requires major transformations in the ways we generate energy and operate technologies that release carbon dioxide. Photonic concepts and novel light-driven technologies provide many potential solutions, transforming our current modes of energy use into more effective and sustainable ones.

Nathalie Picqué, the new director at the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI) in Berlin, Germany, tells us all we need to know about frequency combs and dual-comb spectroscopy, and shares with us some golden tips on becoming a successful scientist.

Joseph Izatt’s work advanced the science of imaging in biophotonics and brought optical coherence tomography imaging to the eye care of infants and children and, as live feedback for the surgeon, to ophthalmic microsurgery.

Following first lasing at LCLS-II — a coherent X-ray laser source driven by a 700-m superconducting linear accelerator — several upgrades are already in the works. Nature Photonics spoke to LCLS director Mike Dunne about LCLS-II commissioning hurdles as well as future plans.

Global proliferation of free-electron laser X-ray sources has improved accessibility. Now the race is on for high repetition rates, attosecond pulses, and full coherence.

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.