Hexagonal germanium and silicon-germanium have direct band gaps
Dynamical fermionization involves velocity, as well as position
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Stacks of lenses make durable, compact systems for conditioning intense beams of X-rays
Adding a mirrored substrate to a standard optical microscope’s sample stage could greatly simplify dark-field imaging and make it more widely accessible
New device could find applications in areas such as the life sciences, airport security and quality control in manufacturing
Sagnac interferometer has the potential to outperform today’s chip-based technologies
Find out about this new technology for low-light applications
Highly sensitive device is the first to detect changes in potassium ion levels in the brains of freely moving mice
New technique could allow for data transmission at 100 gigabits per second
The CEO of CEA-Leti speaks with Physics World at Photonics West 2020
Insights into crystal growth could lead to new optical metamaterials
After an euphoric few years, developers of augmented reality devices face tough challenges ahead
Spectroscopy specialists Senorics and milk-analysis firm Labby take first and second prize in the annual Photonics West competition
Improvements to two-colour laser filament technique could help close terahertz gap
Researchers demonstrate that entangled photons can be transported across long distances in conventional single-mode optical fibre
Photonics experts share tales of bright ideas that panned out – and others where the outcome is yet to be determined
New device might find applications in bioimaging, driverless cars and robotics
This year's Photonics West and BIOS events will bring together scientists, entrepreneurs and big business to discuss the trends that will drive the future of the optics industry
New technique detects substances at much lower concentrations than standard methods, including samples in water