Optical waveguide focusing system with short free-working distance

Journal article (2003)
Department
Imaging Science and Technology (AS) (TU Delft)
Copyright: © 2003 The Author(s); American Institute of Physics
DOI: https://doi.org/doi:10.1063/1.1631063
More Info
expand_more

Published Date

01-12-2003

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Source:

Applied Physics Letters, 83 (22), 2003

Faculty

Applied Sciences

Department

Imaging Science and Technology

Abstract

In photonics, light usually diffracts in all directions when it emerges from a planar optical waveguide. Besides this fact, in this letter we show that a waveguide with a rectangular cross section can be turned to a focusing system by using three-dimensional self-imaging technique. We obtained a configuration where the focus of the field lies outside the waveguide, in air, with a spot size of approximately the resolution limit of half a wavelength. This type of waveguide could be used as a coupling element in integrated optics or in high numerical aperture optical systems.

Files

Wang_2003.pdf
(pdf | 0.252 Mb)