Soft Glass Materials

 

Soft glasses are a range of materials that has the potential to be transparent in the THz spectrum. These materials include glasses such as fluoride glasses (e.g. ZBLAN), chalcogenide (e.g. As2S3, As2Se3) and tellurite compounds. These materials have so far primarily been explored and used in the near- and mid-infrared spectrum, with only little work done in the THz spectrum.

With our ultrabroadband THz time domain spectrometer (TDS) we have the unique ability to measure the index and absorption for these materials at frequencies up towards 20 THz. We have recently investigated As2S3 and found two transparency windows, one at 7-8 THz and the other at 12.2 THz. These two transparent windows are interesting for future nonlinear applications of chalcogenide in the THz range.

Soft glasses are especially interesting due to their high nonlinearities as well as being amorphous semiconductors. While the nonlinear properties are well known at mid-IR and visible wavelengths, the THz properties are relatively unknown. To shed further light on the properties of We are investigating effects such as the THz-induced Kerr nonlinearity and the ultrafast photoconductive properties of various chalcogenide compounds. Our research on soft glass properties is done in collaboration with research groups from University of Nottingham, Saratov State University, National Institute of R&D for Optoelectronics in Bucharest and Australian National University in Canberra.

 

This content is restricted to members of the THz labs. If you are an existing user, please login. New users may register below.

Existing Users Log In
 Remember Me  

This post is password protected. Enter the password to view comments.

© 2012 Terahertz.dk Our research is carried out at DTU Fotonik - Department of Photonics Engineering, Technical University of Denmark. Suffusion theme by Sayontan Sinha