Abstract

A simple subwavelength focusing system formed by a straight or bent multimode waveguide is investigated numerically. The simulation results indicate that an appropriately designed multimode waveguide can focus the outgoing waves of a point source and form an image with a full width at half-maximum of less than half a wavelength in the near-field area at the other side of the waveguide. The physical mechanism of the subwavelength focusing for this imaging system is explained.

© 2004 Optical Society of America

Subwavelength focusing in the near field in mesoscale air–dielectric structures

Pei-Kuen Wei, Hsieh-Li Chou, and Yi-Chun Chen
Opt. Lett. 29(5) 433-435 (2004)

Near-field visualization of light confinement in a photonic crystal microresonator

Patrick Kramper, Maria Kafesaki, Costas M. Soukoulis, Albert Birner, Frank Müller, Ulrich Gösele, Ralf B. Wehrspohn, Jürgen Mlynek, and Vahid Sandoghdar
Opt. Lett. 29(2) 174-176 (2004)

Waveguide-coupled octagonal microdisk channel add–drop filters

Chao Li, Ning Ma, and Andrew W. Poon
Opt. Lett. 29(5) 471-473 (2004)

Characterization of the signature of subwavelength variation from far-field irradiance

Shu-Chun Chu and Jyh-Long Chern
Opt. Lett. 29(10) 1045-1047 (2004)

Surface plasmon polariton propagation in nanoscale metal gap waveguides

Bing Wang and Guo Ping Wang
Opt. Lett. 29(17) 1992-1994 (2004)