Millimeter wave photonics with terahertz semiconductor lasers

Phys.org  March 15, 2021 To accommodate the volume of wireless telecommunication traffic corresponding increases in bandwidth is necessary. Millimeter wave generation using photonic techniques has so far been limited to the use of near-infrared lasers that are down-converted to the mm Wave region. Such methodologies do not currently benefit from a monolithic architecture and suffer from the quantum defect which can ultimately limit the conversion efficiency. An international team of researchers (Italy, France, UK) has demonstrated intracavity mmWave generation within terahertz quantum cascade lasers over the unprecedented range of 25 GHz to 500 GHz. Through ultrafast time resolved techniques, they highlighted the […]