Optimization of Antireflection Coating for Infrared Wavelength
This study focuses on optimizing antireflection coating for infrared wavelengths on rectangular-shaped microstructures using COMSOL simulation. The geometry assumptions, modeling assumptions, transmission results, and observations are presented. The rectangular silicon microstructure enhances transmittance significantly, aligning with previous research. Reference to Douglas S. Hobbs et al.'s work is also provided.
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Presentation Transcript
Antireflection Coating for Infrared Wavelength Optimization of Rectangular-Shaped Microstructure COMSOL
Geometry Assumptions Pitch of the periodic structure is 780 nm Thickness of the silicon pillar is 125 nm Height of the silicon pillar is 450 nm
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 rectangular silicon microstructure increases the transmittance from bulk Si with ~70% to more than 92% between 2.5 um and 4.5 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.
