Chalcogen elements—sulfur, selenium, tellurium, and polonium—comprise Group 16 of the periodic table and are essential components of chalcogenide glass. This material is prized for its infrared applications due to its superior transmission, high refractive index, and exceptional nonlinearity.

Chalcogenide windows at Avantier offer a compelling alternative to traditional germanium windows, providing a unique blend of optical and mechanical properties ideal for a wide range of applications. These advanced materials exhibit exceptional transmission in the infrared spectrum, making them invaluable for infrared spectroscopy, thermal imaging, and other optical systems operating in this wavelength range. Moreover, chalcogenide glasses possess a higher refractive index compared to germanium, enabling the design of more compact and efficient optical systems.