Microstructured Antireflecting Coatings for Infrared Wavelengths

Application ID: 99011

The design of antireflecting coating plays an important role to increase the transmission of the infrared light that propagates through optical structures such as lens and windows.

In this model, we showcase how different bulk structures such as Si and CZT that has the bulk transmittance of 70% and 79% respectively, can be increased to more than 90% by etching the surface of the bulk layer with a particular microstructure. The results matched well with Hobbs et al. paper.

Relevant blog: https://www.comsol.co.in/blogs/designing-antireflecting-microstructures-for-infrared-applications/

Reference: Douglas S. Hobbs, Bruce D. MacLeod, "Design, fabrication, and measured performance of anti-reflecting surface textures in infrared transmitting materials," Proc. SPIE 5786, Window and Dome Technologies and Materials IX, (18 May 2005); doi: 10.1117/12.604532

This model example illustrates applications of this type that would nominally be built using the following products: