Optical waveguide focusing system with short free-working distance

Haifeng Wang, F.H. Groen, S.F. Pereira, J.J.M. Braat

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

11 Citaten (Scopus)
88 Downloads (Pure)


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.
Originele taal-2Engels
Pagina's (van-tot)4486-4487
Aantal pagina's2
TijdschriftApplied Physics Letters
Nummer van het tijdschrift22
StatusGepubliceerd - 2003


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