Plasmonic antireflection surfaces for the mid-infrared

D. W. Peters; L. I. Basilio; H. Loui

doi:10.1117/12.701333

5 February 2007 Plasmonic antireflection surfaces for the mid-infrared

D. W. Peters, L. I. Basilio, H. Loui

Proceedings Volume 6480, Photonic Crystal Materials and Devices VI; 64800A (2007) https://doi.org/10.1117/12.701333
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

In a similar manner to the frequency selective surfaces commonly used in the microwave regime, we have designed antireflective surfaces in the mid-infrared (2-5 μm). Translation of microwave designs to the infrared is not trivial for several reasons. Properties of applicable IR materials are significantly different than their microwave counterparts. Additionally, the required feature sizes need a completely different fabrication methodology. Our surfaces are metallic, yet have a high-transmission angular and frequency passband. We take advantage of photon-plasmon interaction to maximize transmission through holes in the metal surface. Simulations have been completed using both rigorous coupled wave analysis and method of moments codes. The design process has followed a path that insures that we are able to fabricate the designed structures considering cases of normal and off-angle incidence. We designed our surfaces to be compatible with shapes that we will etch in silicon and then coat in gold: this process allows the greatest flexibility in etching shapes for vias while maintaining a metallic layer for plasmon propagation on the surface. We anticipate over 90% transmission in the infrared passband. Our design methodology would also be applicable to the 8-12 μm band.

Citation Download Citation

D. W. Peters, L. I. Basilio, and H. Loui "Plasmonic antireflection surfaces for the mid-infrared", Proc. SPIE 6480, Photonic Crystal Materials and Devices VI, 64800A (5 February 2007); https://doi.org/10.1117/12.701333

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