Journal
MICROMACHINES
Volume 10, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/mi10050310
Keywords
metasurface; metalens; field of view (FOV); achromatic; Huygens' metalens; bio-optical imaging; optical coherence tomography; confocal; two-photon; spectrometer
Categories
Funding
- National Science Foundation [1808436]
- Department of Energy [234402]
- National Institutes of Health (NIH)/National Cancer Institute (NCI)
- KMITL Research Fund
- National Research Council of Thailand
- Thailand Research Fund, Office of the Higher Education Commission of Thailand
- Newton Fund Researcher Links, British Council, UK
- Fraunhofer-Bessel Research Award, Alexander von Humboldt Foundation, Germany
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1808436] Funding Source: National Science Foundation
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Metasurfaces have been studied and widely applied to optical systems. A metasurface-based flat lens (metalens) holds promise in wave-front engineering for multiple applications. The metalens has become a breakthrough technology for miniaturized optical system development, due to its outstanding characteristics, such as ultrathinness and cost-effectiveness. Compared to conventional macro- or meso-scale optics manufacturing methods, the micro-machining process for metalenses is relatively straightforward and more suitable for mass production. Due to their remarkable abilities and superior optical performance, metalenses in refractive or diffractive mode could potentially replace traditional optics. In this review, we give a brief overview of the most recent studies on metalenses and their applications with a specific focus on miniaturized optical imaging and sensing systems. We discuss approaches for overcoming technical challenges in the bio-optics field, including a large field of view (FOV), chromatic aberration, and high-resolution imaging.
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