Scientists at the University of Nottingham have developed a technique to analyze the atomic-level structure of RNA molecules with exceptional precision and speed, and are the first in the world to use the method to examine structural changes in RNA when a cell gets infected with HIV.
The research explores the potential of supercapacitors as a faster-charging and longer-lasting alternative to traditional batteries.
The tech that gets the most attention isn’t always the most useful, affordable, or practical.
Crows can vocally count up to four. The intelligent birds recognize and react to numbers in a process similar to that of human cognition, according to a new study.
A concept that began as a doodle at a conference years ago is now becoming a reality.
RocketStar Inc. has showcased its advanced nuclear-based propulsion technology called the FireStar Drive.
It is said to be the world’s first electric device for spacecraft propulsion boosted by nuclear fusion.
Similar to optical vortex beams, terahertz (THz) vortex beams (TVBs) also carry orbital angular momentum (OAM). However, little research has been reported on the generation of TVBs. In this paper, based on the detour phase technique, we design a series of spintronic terahertz emitters with a helical Fresnel zone plate (STE-HFZP) to directly generate focused TVBs with topological charges (TCs) of l = ±1, ±2 and ±3, respectively. The STE-HFZP is a hybrid THz device composed of a terahertz emitter and a THz lens, and it has a high numerical aperture (NA), achieving subwavelength focal spots. Its focus properties are surveyed systemically through accurate simulations. This STE-HFZP can also generate focused TVBs with higher order TCs.
