Design and fabrication of an achromatic infrared wave plate with Sb–Ge–Sn–S system chalcogenide glass

Abstract

We designed and fabricated an achromatic infrared wave plate. To examine its phase retardation characteristics, the birefringence was calculated using the effective medium theory. A wave plate with a subwavelength grating was fabricated by direct imprint lithography on a low toxic chalcogenide glass (Sb-Ge-Sn-S system) based on calculated results. As a result of imprinting onto chalcogenide glass by a glassy carbon mold, a grating with 1.63 μm depth, a fill factor of 0.7, and a 3 μm period was obtained. The phase retardation of the elements reached around 30° in the 8.5-10.5 μm wavelength range. The fabrication of the infrared wave plate is less costly compared with conventional crystalline wave plates.

Preparation and characterization of quarter-wave plate at 12.4 μm based on CdSe single crystal

“…Mid-infrared polarization control technology from 8 μm to 14 μm has many important applications, with high resolution and low noise, such as, celestial observation, infrared detection, infrared remote sensing and laser communication [1][2][3]. In the field of astronomical observation, infrared polarization measurement technology has been widely used, and the spectrum at 12.4 μm is an important mid-infrared spectrum for studying the upper magnetic field of the solar photosphere [4,5].…”

Room Temperature Imprint Using Crack‐Free Monolithic SiO2‐PVA Nanocomposite for Fabricating Microhole Array on Silica Glass

“…To avoid degradation of the imprint mold, considerable effort has been paid to develop low-softening-temperature glasses [9][10][11]. Conversely, silica glass has been applied to many industrial fields resulting from excellent thermal, chemical, mechanical, and optical properties.…”