Spectroscopy and theory shed light on excitons in semiconductors

Research team make extremely fast, precise images for first time

21-Mar-2024 - From solar panels on our roofs to the new OLED TV screens, many everyday electronic devices simply wouldn’t work without the interaction between light and the materials that make up semiconductors. A new category of semiconductors is based on organic molecules, which largely consist of carbon, ...

Crystal structures in super slow motion

Researchers first to succeed in filming a phase transition with extremely high spatial and temporal resolution

26-Jan-2021 - Laser beams can be used to change the properties of materials in an extremely precise way. This principle is already widely used in technologies such as rewritable DVDs. However, the underlying processes generally take place at such unimaginably fast speeds and at such a small scale that they ...

‘Whispering gallery’ effect controls electron beams with light

Light can add functionality to electron microscopy

08-Jun-2020 - When you speak softly in one of the galleries of St Paul’s cathedral, the sound runs so easily around the dome that visitors anywhere on its circumference can hear it. This striking phenomenon has been termed the ‘whispering gallery’ effect, and variants of it appear in many scenarios where a ...

Researchers demonstrate nanoscale X-ray imaging of bacterial cells

10-Dec-2009 - An ultra-high-resolution imaging technique using X-ray diffraction is a step closer to fulfilling its promise as a window on nanometer-scale structures in biological samples. In the Proceedings of the National Academy of Sciences, researchers report progress in applying an approach to "lensless" ...