These filters incorporate metal mesh frequency-selective surfaces (FSS), which are comprised of thin metal films patterned with geometric holes. Based on the size and features of the pattern, the material will resonate with some frequencies and reject others. The patterns utilized in this new line of THz filters have been designed and simulated using FSS modeling software to provide improved performance over standard cross mesh patterns. The manufacturing of the gold mesh patterns is accomplished using thin film metal depositions and photolithography.
“The manufacturing method is compatible with our existing capabilities in precision-patterned-materials,” said Dave Beatson, General Manager of Thorlabs’ Quantum Electronics group in Jessup, MD. “We are excited about the rapid growth of these product lines, which include reticles, calibration targets, and various metal patterns on optical components.”