Title :
Experimental verification 3D subwavelength resolution beyond Abbe barrier with flat diffractive optic in millimeter wave
Author :
Minin, I.V. ; Minin, O.V.
Author_Institution :
Siberian State Acad. of Geodesy, Novosibirsk, Russia
Abstract :
It has been experimentally shown that in the near field of single diffractive lens with subwavelength focal distance F≤λ without of the immersion medium a resolution of 0.3-0.4λ were obtained. The "Abbe barrier" can be completely broken by such diffractive lenses with unique 3D super resolution. Also it was experimentally shown the focal spot in the high numerical aperture diffractive lenses is no longer an Airy pattern and focal intensity distribution is not circularly symmetric.
Keywords :
Fresnel diffraction; diffractive optical elements; lenses; near-field scanning optical microscopy; 3D subwavelength resolution; 3D super resolution; Abbe barrier; experimental verification; flat diffractive optic; millimeter wave; near field pattern; numerical aperture diffractive lens; subwavelength focal distance; Antenna measurements; Apertures; Fresnel reflection; Lenses; Optical diffraction; Optical waveguides; Three-dimensional displays;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956367
