UCLA engineers shrink powerful terahertz systems onto a single semiconductor chip
Peer-Reviewed Publication
Updates every hour. Last Updated: 30-Oct-2026 20:15 ET (31-Oct-2026 00:15 GMT/UTC)
Terahertz waves have major potential in high-speed communication, imaging, security screening and sensing, but are still underused due to complex and bulky systems. UCLA researchers integrated laboratory-sized terahertz systems onto one semiconductor chip, opening the door to compact, scalable devices. The breakthrough focused on quantum well semiconductor structures — ultrathin layers engineered to control light — that can generate, detect, modulate and amplify terahertz signals on a single chip.
Like a propeller, new drone spins too fast for the human eye to see clearly. It’s about 10 times less visually perceptible than a conventional quadcopter. AI designed and optimized the drone, determining ideal placement of each component to make it harder to see.
Patient trust in medical professionals might hinge on what artificial intelligence (AI) has to say, according to a team led by Penn State researchers. Using an AI chatbot roleplaying as a human doctor, the team identified how people perceive medical professionals when they think a “human” doctor consults an AI system for a second opinion during mental health consultations. They found that when the AI system agreed with the proxy doctor’s recommendation, patients viewed the professional’s assessment as more credible. But when the AI disagreed with the doctor’s assessment, patient perceptions of medical uncertainty and doctor laziness increased.