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Soft Ferrite Bi-layer Design of Frequency Selective Micro Cavity
Journal
International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
ISSN
21622027
Date Issued
2022-01-01
Author(s)
Arya, Meenakshi
Pattanayak, Arnab
Gandhi, Mayuri N.
Pradhan, Kousik
Punjal, Ajinkya
Prabhu, Shriganesh S.
Achanta, Venu Gopal
Duttagupta, Siddhartha P.
Abstract
The designs for Frequency Selective Micro Cavity (FSMC) structures in the terahertz band have been proposed, based on ferrite composite layers. A high-value complex-permittivity Ni0.5Co0.2Zn0.3Fe2O4 base layer has been previously reported and demonstrates low transmittance at 1THz and above. The scope entails design of Anti-Reflective Coatings (ARC) for broad-band (0.5-2.5THz) cavity absorbance of 90% and higher. The reported deliverables are as follows - (i) development of thick film coatings with tunable refractive index based on SU8 and micro-machined ferrite grains, (ii) analytical studies to determine ARC properties (single and bi-layer) for optimal performance, and (iii) multi-physics simulations. The results reported from (ii) and (iii) are well matched. Ongoing work involves setup development for THz reflectance measurements to help validate cavity performance and explore cavity applications.
Volume
2022-August