Submission + - Researchers Build Quantum Antenna to Precisely Measure Terahertz Signals (scitechdaily.com)
A research team from the Faculty of Physics and the Centre for Quantum Optical Technologies at the Centre of New Technologies, University of Warsaw has introduced a new approach for detecting extremely weak terahertz signals by using a “quantum antenna.” Their method relies on a specialized system that employs Rydberg atoms for radio wave detection, allowing them not only to capture these signals but also to accurately calibrate a frequency comb in the terahertz range.
This part of the electromagnetic spectrum was considered largely unexplored until recently, and the breakthrough, reported in Optica, offers a pathway toward highly sensitive spectroscopy and a new class of quantum sensors that can function at room temperature.
Terahertz (THz) radiation occupies a unique position within the electromagnetic spectrum, sitting between microwaves (such as those used in Wi-Fi) and infrared light at the intersection of electronics and optics. It promises a wide range of applications, including scanning packages without harmful X-rays, enabling ultra-fast 6G communication, and advancing spectroscopy and organic compound imaging.