Nanowerk  October 5, 2021 Chalcogenide glasses have long been constrained to the near- and mid-infrared with respect to their applications in photonics because they strongly absorb wavelengths of light in the visible and ultraviolet parts of electromagnetic spectrum. An international team of researchers (USA – Duke University, US Naval Research Laboratory, industry, university of Pennsylvania, Aviation and Missile Center, Aviation and Missile Center, US Army, Italy) has experimentally demonstrated and reported near-infrared to ultraviolet frequency conversion in an As2S3-based metasurface, enabled by a phase locking mechanism between the pump and the inhomogeneous portion of the third harmonic signal. Due to […]