An array of LEDs emitting entangled photons based on single quantum dots inside pyramidal recesses.

Article p782

IMAGE: TUNG-HSUN CHUNG, TYNDALL NATIONAL INSTITUTE, UNIVERSITY COLLEGE CORK

COVER DESIGN: BETHANY VUKOMANOVIC

Interactions between single zinc and mercury ions with plasmonic gold nanorods are monitored using an optical whispering gallery mode sensor.

Article p733; News & Views p697

IMAGE: ELLA MARUSHCHENKO

COVER DESIGN: BETHANY VUKOMANOVIC

Artist's impression of a solid-state optoelectronic device that generates single photons for use in experiments in quantum optics.

Review Article p631

IMAGE: IGOR AHARONOVICH, DIRK ENGLUND AND MILOS TOTH

COVER DESIGN: BETHANY VUKOMANOVIC

Artist's impression of the optical apparatus used to perform fluorescent imaging of a single, trapped, cooled ytterbium ion. The ultrahigh positional sensitivity of the approach makes it possible to directly observe atomic motion.

Article p606

IMAGE: SEAN KELLEY/JOINT QUANTUM INSTITUTE

COVER DESIGN: BETHANY VUKOMANOVIC

Phase locking of a 2D array of coupled surface-emitting terahertz quantum cascade nanolasers results in an output beam with diffraction-limited divergence and high power.

Article p541

IMAGE: D. LIU, T.-Y. KAO AND Q. HU

COVER DESIGN: BETHANY VUKOMANOVIC

Artistic illustration of coherent nonlinear optical interactions taking place between a single molecule of dibenzanthanthrene and pump and probe beams containing just a few photons.

Letter p450; News & Views p438

COVER DESIGN: BETHANY VUKOMANOVIC, BASED ON A CONCEPT BY VAHID SANDOGHDAR

An optomechanical microresonator formed from a glass microtoroid (pictured) is shown to support the transfer of optical chaos from a strong pump signal to a weaker probe signal via mechanical motion of the resonator.

Article p399; News & Views p366

IMAGE: F. MONIFI, S. K. öZDEMIR, B. PENG AND L. YANG

COVER DESIGN: BETHANY VUKOMANOVIC

A spectrotemporal view of the emergence of femtosecond mode-locking. Real-time spectroscopy provides a stream of spectra during the build-up of ultrashort pulses from noisy fluctuations. This 3D representation visualizes the final stage of the process: one narrowband spectral line rapidly broadens, bursts and finally relaxes to a broad femtosecond spectrum.

Article p321

IMAGE: GEORG HERINK

COVER DESIGN: BETHANY VUKOMANOVIC

Scanning near-field optical microscopy reveals the structure of plasmon sheet and edge modes in graphene disk and rectangular nanoresonators.

Letter p239

IMAGE: ELLA MARUSHCHENKO

COVER DESIGN: BETHANY VUKOMANOVIC

The experimental set-up used by Hafezi and colleagues to measure the winding number of edge states in a 2D photonic system consisting of a 2D array of ring resonators.

Letter p180

IMAGE: EMILY EDWARDS, JOINT QUANTUM INSTITUTE

COVER DESIGN: BETHANY VUKOMANOVIC

Image of a living cell generated by a super-resolution nanoscopy imaging scheme called 'protected STED'. The cell's vimentin cytoskeleton filaments with a width of about 40 nm are clearly highlighted by a reversibly photoswitchable fluorescent protein. The use of two means, stimulated emission and reversible photoswitching, for switching off the fluorescence, protects the fluorophores from photobleaching.

Article p122

IMAGE: MAX PLANCK INSTITUTE FOR BIOPHYSICAL CHEMISTRY

COVER DESIGN: BETHANY VUKOMANOVIC

Artist's impression of a light beam 'writing' a desired functionality into a reconfigurable optical device formed from a phase change material of germanium–antimony–tellurium. Functions may include lensing with multiple focal spots and variable focal lengths, holograms and optical filters.

Article p60

IMAGE: PHIL SAUNDERS, EDWARD ROGERS AND NIKOLAY ZHELUDEV

COVER DESIGN: BETHANY VUKOMANOVIC