THz-wave emitter device with record-breaking longevity opens new frontiers in next-generation communications/ computing technologies

https://phys.org/news/2025-12-terahertz-device-quantum-horizons.html

"prototype device fabricated >11 years ago still works as well/ stable as on day 1... longevity (materials' intrinsic resilience/ engineered to resist degradation from air or moisture)/ stability... built from high-temperature superconductor/ consists of atomically thin layers... contains Josephson junctions, enabling phase-locked coherent generation/ transmission... small (elements less than human hair width), 1 V low-power... emits waves tunable from 100 GHz to 1 THz... operates as superconductor near 90°K"