Enhancing Infrared Transmission with Pyramid-Shaped Microstructure Coating
Explore the application of pyramid-shaped microstructure coating for enhancing infrared transmission, achieving over 94% transmittance in the 7-14um spectrum. The study includes geometry assumptions, modeling considerations, transmission profiles, and references validating the findings. Reference to Douglas S. Hobbs et al.'s work adds credibility to the results obtained. Discover how this innovative approach improves transmittance while accounting for angle of incidence variations.
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Presentation Transcript
Antireflection Coating for Infrared Wavelength Pyramid-Shaped Microstructure COMSOL
Geometry Assumptions Pitch of the periodic structure is 2.4 um Height of the CZT pyramid is 5 um Top width of the CZT pyramid is 100 nm Bottom width of the CZT pyramid is 2.16 um Single unit cell model
Modeling Assumptions Out of plane polarization is considered The 1 out of plane diffraction orders were added to the second Port to account for higher order diffraction wave propagation
Observations The pyramidal CZT microstructure increases the transmittance from bulk CZT ~79% to more than 94% between the 7 um and 14 um spectrum. The transmittance reduces with the increase in angle of incidence. The results matched well with the Hobbs et al. paper [1].
Reference 1. 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.
