Innovative LiDAR/TLS 3D scanning method LiDAR works by emitting laser pulses and measuring the time they take to return (time of flight) from scanned surfaces, which generates a dense 3D point cloud (a spatial dataset with x, y, and z coordinates).  “TLS technology offers high accuracy but is costly and challenging to operate inside caves, […]

When the pump laser was circularly polarized, time reversal symmetry (in which behavior remains the same whether time runs forward or backward) was broken and a topological gap was opened (with Chern number C=1). “On the other hand, when the pump laser is linearly polarized the gap remains closed,” Zhen says. “Essentially, we verified all

In this episode of Photonics Hot List: Diagnosing diabetes typically requires invasive, expensive lab work. But Penn State researchers are making the process simpler with a sensor that can diagnose via just a breath sample. Laser and machine tool manufacturer TRUMPF is joining forces with technology company Siemens to accelerate digital manufacturing and AI readiness.

In an advance for frequency combs, Alireza Marandi, a professor of electrical engineering and applied physics at Caltech, and his team recently created a nanophotonic device to produce a broad range of laser light frequencies with ultrahigh efficiency on a microchip. How did they pull it off? By combining dispersion engineering—shaping the way different wavelengths