Title :
Analysis and design of subwavelength focusing by cylindrical lenses
Author :
Rodríguez-esquerre, V.F. ; Rêgo, Davi Franco ; Santos, E.T.F. ; Rubio-Mercedes, C.E. ; Pereira, Crislaine Aparecida ; Hernández-Figueroa, H.E.
Author_Institution :
IFBahia, Fed. Inst. of Bahia, Salvador, Brazil
Abstract :
We present the design and analysis of subwavelength lenses based on air cylindrical waveguides surrounded by metal for the focusing of light in very small areas. The lenses are composed by several concentrically disposed air-metal waveguides with different widths in order to control the phase shifting necessary to focus the light. The lenses we designed to operate at visible frequencies then, the propagation mechanism of light along the air-metal waveguides is obtained by the surface plasmon polaritons (SPPs). The structures have been analyzed by an efficient finite element formulation in cylindrical coordinates with perfectly matched layer (PMLs).
Keywords :
circular waveguides; finite element analysis; lenses; optical design techniques; optical focusing; optical materials; optical waveguides; phase control; plasmonics; surface plasmons; air-metal waveguides; cylindrical lenses; cylindrical waveguides; finite element formulation; perfectly matched layer; phase shifting; subwavelength focusing; surface plasmon polaritons; Lenses; Optical design; Photonic lenses; numerical techniques; subwavelength focusing; surface plasmon polaritons;
Conference_Titel :
Microwave and Optoelectronics Conference (IMOC), 2009 SBMO/IEEE MTT-S International
Conference_Location :
Belem
Print_ISBN :
978-1-4244-5356-6
Electronic_ISBN :
1679-4389
DOI :
10.1109/IMOC.2009.5427486
