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“#Hot ring produces microwave-powered ultrasound pulses wirelessly” Thermoacoustic imaging of ultrasound wave generation from the split ring resonator, from Lan et al. 2020, Figure 3 (doi 10.1117/1.AP.2.3.036006) Credit: SPIE Ultrasound imaging is one of the workhorses in a modern hospital. It hits the trifecta of being relatively cheap, portable and non-invasive. Causing future parents to…
“#Using light turbulence to generate frequency combs from small ring lasers” Electron microscope image showing a detail of a defect-engineeredring. The air slit acts as a reflection point in the waveguide, inducingcounter-propagating waves. Credit: Harvard John A. Paulson School of Engineering and Applied Sciences We’ve all experienced turbulent air and water, but did you know…
“#From custom-built to ready-made photonics” Compact silicon-nitride integrated soliton microcomb chip device in a butterfly package with a fiber output. Credit: Lin Chang (UCSB) Information technology continues to progress at a rapid pace. However, the growing demands of data centers have pushed electrical input-output systems to their physical limit, which has created a bottleneck. Maintaining…
“#A breakthrough in developing multi-watt terahertz lasers” A phase-locking scheme for plasmonic lasers is developed in which traveling surface-waves longitudinally couple several metallic microcavities in a surface-emitting laser array. Multi-watt emission is demonstrated for single-mode terahertz lasers in which more photons are radiated from the laser array than those absorbed within the array as optical…
“#Ultra-thin camera lenses of the future could see the light of day” In the future, camera lenses could be thousands of times thinner and significantly less resource-intensive to manufacture. Researchers from Chalmers University of Technology, Sweden, now present a new technology for making the artificial materials known as ‘metasurfaces’, which consist of a multitude of…