Planar lenses based on nanoscale slit arrays in a metallic film.
We experimentally demonstrate planar lenses based on nanoscale slit arrays in a metallic film. Our lens structures consist of optically thick gold films with micron-size arrays of closely spaced, nanoscale slits of varying widths milled using a focused ion beam. We find excellent agreement between electromagnetic simulations of the design and confocal measurements on manufactured structures. We provide guidelines for lens design and show how actual lens behavior deviates from simple theory.
Verslegers
Lieven
L
E. L. Ginzton Laboratory, Geballe Laboratory for Advanced Materials (GLAM), Stanford University, Stanford, California 94305, USA.
Catrysse
Peter B
PB
Yu
Zongfu
Z
White
Justin S
JS
Barnard
Edward S
ES
Brongersma
Mark L
ML
Fan
Shanhui
S
D017076:Computer-Aided Design; D003460:Crystallization / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008567:Membranes, Artificial; D008670:Metals / Q000737:chemistry*; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D010316:Particle Size; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013499:Surface Properties
D046911:Macromolecular Substances; D008567:Membranes, Artificial; D008670:Metals