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9 September 2019 High-performance mid-IR metasurface optics (Conference Presentation)
Mikhail Shalaginov, Sensong An, Hanyu Zheng, Li Zhang, Clayton Fowler, Jun Ding, Tian Gu, Hualiang Zhang, Juejun Hu
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Proceedings Volume 11080, Metamaterials, Metadevices, and Metasystems 2019; 1108005 (2019) https://doi.org/10.1117/12.2527527
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States
Abstract
The mid-infrared (mid-IR) spectral region contains the characteristic vibrational absorption bands of most molecules as well as two atmospheric transmission windows, and is therefore of critical importance to many biomedical, military, and industrial applications such as spectroscopic sensing, thermal imaging, free-space communications, and infrared countermeasures. Metasurface devices operating in the mid-IR potentially offer significantly reduced size, weight, and cost compared to traditional bulk optics, but they are also challenged with unique material and processing requirements. By combining high-index, broadband transparent dielectric materials with a Huygens metasurface design, we have experimentally realized high-performance metasurface devices with a low-profile, deep sub-wavelength thickness. Based on the platform, we demonstrated single-layer metalenses with focusing efficiencies up to 75% and diffraction-limited performance over a record field of view close to 180 degrees. These meta-optical devices can provide significantly enhanced design flexibility for future infrared optical systems.
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Mikhail Shalaginov, Sensong An, Hanyu Zheng, Li Zhang, Clayton Fowler, Jun Ding, Tian Gu, Hualiang Zhang, and Juejun Hu "High-performance mid-IR metasurface optics (Conference Presentation)", Proc. SPIE 11080, Metamaterials, Metadevices, and Metasystems 2019, 1108005 (9 September 2019); https://doi.org/10.1117/12.2527527
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KEYWORDS
Mid-IR
Free space optics
Thermography
Absorption
Atmospheric optics
Atmospheric sensing
Biomedical optics
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