Diffractive optics for GaN terahertz detectors arrays

• Published in: 2016 21st International Conference on Microwave, Radar and Wireless Communications (MIKON) pp. 1 - 5
• Main Authors: Suszek, J., Sypek, M., Siemion, A., Nowakowska-Siwinska, A., Zagrajek, P., Cywinski, G., Szkudlarek, K., Yahniuk, I., Yatsunenko, S., But, D. B., Coquillat, D., Knap, W.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-05-2016
• Subjects: Detectors; HEMTs; Lenses; MODFETs; Optical sensors; Optical variables measurement
• DOI: 10.1109/MIKON.2016.7492049

Fabrication and experimental tests of materials and optics for Terahertz range used in field effect transistor detectors arrays are described. The method using diffractive optics, fabricated in 3D printing technology, was used for tests with GaN/AlGaN based FETs sub-THz detectors working in 300 GHz atmospheric window. The lens arrays focus energy exactly on the detectors and additionally reduce mutual detector crosstalk. Finally they improve detectors signal to noise ratio by more than one order of magnitude. Moreover such lens arrays are cost-effective, easy reproducible and thin elements.