Ultrathin high-index metasurfaces for shaping focused beams
| Contribuinte(s) |
Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía Óptica y Ciencias de la Visión |
|---|---|
| Data(s) |
20/01/2016
20/01/2016
01/09/2015
|
| Resumo |
The volume size of a converging wave, which plays a relevant role in image resolution, is governed by the wavelength of the radiation and the numerical aperture (NA) of the wavefront. We designed an ultrathin (λ/8 width) curved metasurface that is able to transform a focused field into a high-NA optical architecture, thus boosting the transverse and (mainly) on-axis resolution. The elements of the metasurface are metal-insulator subwavelength gratings exhibiting extreme anisotropy with ultrahigh index of refraction for TM polarization. Our results can be applied to nanolithography and optical microscopy. Spanish Ministry of Economy and Competitiveness (MEC) (TEC2013-50416-EXP). |
| Identificador |
Mahin Naserpour, Carlos J. Zapata-Rodríguez, Carlos Díaz-Aviñó, Mahdieh Hashemi, and Juan J. Miret, "Ultrathin high-index metasurfaces for shaping focused beams," Appl. Opt. 54, 7586-7591 (2015). doi:10.1364/AO.54.007586 1559-128X (Print) 2155-3165 (Online) http://hdl.handle.net/10045/52496 10.1364/AO.54.007586 |
| Idioma(s) |
eng |
| Publicador |
Optical Society of America |
| Relação |
http://dx.doi.org/10.1364/AO.54.007586 |
| Direitos |
This paper was published in Applied Optics, and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: https://www.osapublishing.org/ao/abstract.cfm?uri=ao-54-25-7586. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. info:eu-repo/semantics/openAccess |
| Palavras-Chave | #Subwavelength structures #Surface plasmons #Resolution #Óptica |
| Tipo |
info:eu-repo/semantics/article |
