Novel integrated photonic circuits could close ‘terahertz gap’ . 16?Jan?2023 EPFL, ETHZ and Harvard team develops new thin-film circuit that creates THz laser waves. HYLAB's chip with integrated photonic circuit made of lithium niobate. EPFL , Lausanne, Switzerland, has collaborated with Harvard and ETH Zurich on a new thin-film circuit that, when connected to a laser beam, produces finely-adjustable terahertz-frequency waves. The partners say the device “opens up...