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13 March 2024 Design, materials, and manufacturing of optical metasurfaces for flat optics, devices, and applications
Jeong-Geun Yun, Hyunjung Kang, Dohyun Kang, Joohoon Kim, Gyeongtae Kim, Junsuk Rho
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Proceedings Volume PC12897, High Contrast Metastructures XIII; PC128970F (2024) https://doi.org/10.1117/12.2691989
Event: SPIE OPTO, 2024, San Francisco, California, United States
Abstract
Augmented reality glasses have been considered a promising candidate for next-generation mobile hardware platforms. However, the bulky form factor and high-power consumption of their display systems using conventional optical components hinder the commercialization of augmented reality glasses. In this work, we demonstrate metasurface-based waveguide as an image combiner having high efficiency and large field of view. To design the metasurface-based waveguide consists of metasurface grating we propose an inverse design method based on gradient-descent optimization. In addition, our design method exploiting high degrees of freedom in meta-atom design can precisely control wave propagation through waveguides, enabling two-dimensional pupil expansion. As proof of concept, we fabricated metasurface-based waveguide providing a high efficiency of 500nit/lm and a large field of view of 50 degrees. We expect that the proposed metasurface-based waveguide opens up a new route for the development of augmented reality display systems with glass-like form factors suitable for daily wear.
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Jeong-Geun Yun, Hyunjung Kang, Dohyun Kang, Joohoon Kim, Gyeongtae Kim, and Junsuk Rho "Design, materials, and manufacturing of optical metasurfaces for flat optics, devices, and applications", Proc. SPIE PC12897, High Contrast Metastructures XIII, PC128970F (13 March 2024); https://doi.org/10.1117/12.2691989
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KEYWORDS
Waveguides
Augmented reality
Design and modelling
Glasses
Displays
Optical components
Optical design
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