Physical Sciences

Image of a galaxy
| 3 min read
The slice of carbon fiber in the microelectric circuit is electrically connected to the gold/chromium electrodes with platinum/carbon electrodes.
| 2 min read
The new component is made of silicon nitride and consists of nine separate waveguides (left). Each waveguide is composed of 22 spirals and can amplify light by about ten times with a noise figure of only 1.2 decibels. Each spiral (right) has an area of 1 square millimeter and the shape enables the compact design of the amplifier.
| 3 min read
Upon illumination with red light, third harmonic scattered light (in violet) reveals the twist of metal nanoparticles.
| 3 min read
Artist's concept of a microbial fuel cell with efficiencies boosted by silver nanoparticles
| 2 min read
Bacteria
| 2 min read
Person holding batteries
| 3 min read
Crystals of the material hexagonal boron nitride can be etched so that the pattern you draw at the top transforms into a smaller and razor-sharp version at the bottom. These perforations can be used as a shadow mask to draw components and circuits in graphene. This process enables a precision that is impossible with even the best lithographic techniques today. To the right are images of triangular and square holes taken with an electron microscope.
| 3 min read
Image of circuits
| 2 min read
Researchers created two WGM microresonators with different absorption losses and coupled their optical fields by setting them close together. Each resonator is coupled to a fiber waveguide. By changing the gap between the resonators and waveguides, they were able to tune the coupling loss
| 4 min read
Measuring 12 cms, the object that is to be made invisible acoustically is placed between two acrylic glass panels at the centre of the experiment. The initial acoustic field is produced by the loudspeakers in the outer ring. The 228 control sensors in the central ring record this field and transmit the data to a computer in the next room. Subsequently, 36 control sources in the centre emit a secondary signal that augments the initial field in real-time.
| 3 min read
Image of two cloth masks
| 3 min read
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CURRENT ISSUE - November/December 2025

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