NEWSROOM

A quantum "wave packet" (in the middle) launched from the same kind of starting point behaves differently. Even after bouncing around for a very long time, faint filament-like patterns (bright glow) are still visible, a tattoo tracing back to its early history. This lingering imprint is the "quantum birthmark" described in the study. Credit: Joonas Keski-Rahkonen, Tampere University Even the most chaotic quantum systems keep a permanent mark of their own past – a "quantum bir

Waste polyamide-derived CQDs show continuous photoluminescence tuning from 308 to 552 nm through sequential defect-state engineering, with optical transition energies decreasing from 4.32 to 2.50 eV. @Christian Ebere Enyoh from Saitama University Carbon quantum dots (CQDs) are fluorescent carbon nanomaterials with potential applications in sensing, optoelectronics, displays, anti-counterfeiting, and environmental technologies. Their optical properties can be adjusted by modif

A Fourier transform revealing spatial patterns on the surface at 300 millikelvins. A charge density wave signals the presence of the pair density wave. The background is tellurium atoms on the surface of uranium ditelluride. @University of Illinois Urbana-Champaign’s Grainger College of Engineering Physicists with the University of Illinois Urbana-Champaign’s Grainger College of Engineering have identified a new form of superconducting behavior. Experiments on the metal urani

The researchers used circularly polarized light at normal incidence and found that helicity-dependent photocurrents appeared perpendicular to the crystal’s polarization but vanished when measured parallel to it, supporting a bulk origin of CPGE. @Institute of Science Tokyo The circular photogalvanic effect (CPGE), a phenomenon that generates helicity-dependent photocurrents in noncentrosymmetric materials, can originate purely from a crystal's internal structure without contr

Illustration (University of Basel, Timon Baltisberger): Biexziton decay can generate photons of very high quality if the system is specifically controlled using an optical cavity. Under these conditions, 90 per cent of the photons are indistinguishable. Working in close collaboration, researchers from Paderborn University, the University of Basel and Ruhr University Bochum have made a significant breakthrough in the field of quantum communication. In their recently published

Inspired by Metal-Organic Framework based topological insulators, researchers at Tsinghua University proposed valley photonic molecular crystal (VPMC) and investigated the impact of molecular rotation on the valley-topological properties of VPMC. Credit: Tsinghua University/Xue Feng A research team led by Yidong Huang at Tsinghua University, including Xue Feng and Yongzhuo Li, has developed valley photonic molecular crystals (VPMCs) on a silicon platform. Combining theoretica

A junction transistor fabricated on a 6-inch SiC epi-wafer. Kyoto, Japan -- While silicon carbide -- SiC -- has long been promoted as the key to developing electronics suitable for extreme environments, the field has been stuck in the lab for some time. Now, a team of researchers focusing on junction field-effect transistors, or JFETs, have succeeded in developing a new SiC transistor structure that can operate at 600°C, as announced recently by Kyoto University.* One of the

The system integrates a III-V semiconductor light source, SiN-based interferometers, Si-Ge photodetectors (PDs), and an integrated ball-lens microprobe, thereby combining the distinct advantages of multiple photonic integration platforms. The insets illustrate complementary technologies that can be incorporated to realize a miniaturized, fully integrated OCT system. Abbreviations: ADC, analog-to-digital converter. Inset 1: Foundry-scalable embedded III-V lasers on silicon-on-

Summary of gold nanoparticle growth programming in liposome based on localization of biomineralization peptide The position of biomineralization peptides within liposomes can influence how gold nanoparticles grow, reports a research team from Institute of Science Tokyo. Peptides localized at the membrane interface promote branched structures, while those confined to the liposome interior favor spherical nanoparticles. The findings offer a new strategy for controlling nanoscal

(a) The structure of the gate electrodes on the ZnO device used in the experiment in this paper. (b) The charge stability diagram indicating the formation of ZnO double quantum dot in few-electron regime. Researchers at Tohoku University, in collaboration with the National Institute for Materials Science (NIMS) and the University of Tokyo, have taken an important step toward semiconductor quantum computing using zinc oxide (ZnO). The team successfully demonstrated charge sens

Stack two atomically thin layers, rotate one slightly against the other, and a new material emerges. The resulting moiré pattern can slow electrons down so much that their interactions take over. This produces superconductivity, magnetism and exotic fractional quantum states that neither layer shows on its own. This field, known as twistronics, has become one of the most active frontiers in condensed matter physics. So far, however, it has been built on only a handful of mate

From a two-colour diffraction pattern (left), two snapshots of a helium droplet doped with xenon nanoparticles can be reconstructed (centre). These images can inform a potential 3D rendering of a xenon-doped helium nanodroplet (right). An overarching goal of ultrafast science is to enable researchers to watch structural changes in matter on their natural timescale. Experimentally, this translates into taking two snapshots of the same nanoscale object that are only femtosecond