NEWSROOM

In a groundbreaking experiment, researchers from Tianjin University, Zhejiang University, Northeastern University and University of Science and Technology of China have directly observed anti-Klein tunneling (AKT)—a quantum paradox where chiral particles are entirely reflected instead of passing through an energy barrier. This long-sought quantum-like behavior is realized not with electrons, but with engineered sound waves in a custom-designed bilayer phononic crystal.

The chip, as thin as a strand of hair, uses two pairs of microring modulators to achieve unprecedented performance levels.

A group of DESY scientists together with colleagues from Finland and France has observed signatures of polariton-formation at extreme-ultraviolet (EUV) wavelengths for the first time. In general, polaritons are hybrid-states that emerge from the interplay of light and matter excitations - mostly observed under strong-coupling conditions.

MIT researchers have developed a novel AI hardware accelerator that is specifically designed for wireless signal processing. Their optical processor performs machine-learning computations at the speed of light, classifying wireless signals in a matter of nanoseconds.

In their proof-of-concept device, consisting of an array of 20 tunable microresonators, the team demonstrated that each multiplexed microresonator produced high-quality entangled photon pairs as compared to the best resonators they produced in previous work — design elements of the components in that paper have found their way into Cisco Systems’ newly unveiled quantum entanglement chip.

Concentrating light in a volume as small as the wavelength itself is a challenge that is crucial for numerous applications. Researchers from AMOLF, TU Delft, and Cornell University in the USA have demonstrated a new way to focus light on an extremely small scale. Their method utilizes special properties of a photonic crystal and works for a broader spectrum of wavelengths than alternative methods.