Flat lens

Not to be confused with Fresnel lens.

A flat lens is a lens whose flat shape allows it to provide distortion-free imaging, potentially with arbitrarily-large apertures.[1] The term is also used to refer to other lenses that provide a negative index of refraction.[2] Flat lenses require a refractive index close to −1 over a broad angular range.[3][4] In recent years, flat lenses based on metasurfaces were also demonstrated.[5]

  1. ^ Xu, Ting; Agrawal, Amit; Abashin, Maxim; Chau, Kenneth J.; Lezec, Henri J. (2013-05-23). "Flat spray-on optical lens created". Nature. 497 (7450). Sciencedaily.com: 470–474. Bibcode:2013Natur.497..470X. doi:10.1038/nature12158. PMID 23698446. S2CID 4402046. Retrieved 2013-10-20.
  2. ^ Cite error: The named reference wired0812 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference nat0513 was invoked but never defined (see the help page).
  4. ^ Aieta, F.; Genevet, P.; Kats, M. A.; Yu, N.; Blanchard, R.; Gaburro, Z.; Capasso, F. (2012). "Aberration-Free Ultrathin Flat Lenses and Axicons at Telecom Wavelengths Based on Plasmonic Metasurfaces". Nano Letters. 12 (9): 4932–4936. arXiv:1207.2194. Bibcode:2012NanoL..12.4932A. doi:10.1021/nl302516v. PMID 22894542. S2CID 5412108.
  5. ^ Yu, Nanfang; Capasso, Federico (2014). "Flat optics with designer metasurfacces". Nat. Mater. 13 (2): 139–150. Bibcode:2014NatMa..13..139Y. doi:10.1038/nmat3839. PMID 24452357.