Metalenses at visible wavelengths: past, present, perspectives
نویسندگان
چکیده
منابع مشابه
Metalenses at visible wavelengths: Diffraction-limited focusing and subwavelength resolution imaging.
Subwavelength resolution imaging requires high numerical aperture (NA) lenses, which are bulky and expensive. Metasurfaces allow the miniaturization of conventional refractive optics into planar structures. We show that high-aspect-ratio titanium dioxide metasurfaces can be fabricated and designed as metalenses with NA = 0.8. Diffraction-limited focusing is demonstrated at wavelengths of 405, 5...
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ژورنال
عنوان ژورنال: Laser & Photonics Reviews
سال: 2017
ISSN: 1863-8880
DOI: 10.1002/lpor.201600295