Abstract

A circle of planar nanoholes in a dielectric thin film can focus light into a sub-half-wavelength spot. The nanostructure with higher rotational symmetry shows better focusing properties. From finite-difference time-domain calculations, we verified such a focusing spot coming from the constructive interference of diffraction beams near the nanoholes. For a 1μm size lens with eight 200nm diameter holes, we achieved an optical spot smaller than 250nm measured at 650nm wavelength. This nanostructure provides a simple way to massively fabricate a planar lens array with a scale down to the submicrometer level.

© 2009 Optical Society of America

Full Article  |  PDF Article
Related Articles
Microlenses and microlens arrays formed on a glass plate by use of a CO2 laser

M. Wakaki, Y. Komachi, and G. Kanai
Appl. Opt. 37(4) 627-631 (1998)

Patterning flood illumination with microlens arrays

Ming-Hsien Wu, Kateri E. Paul, and George M. Whitesides
Appl. Opt. 41(13) 2575-2585 (2002)

Coplanar refractive–diffractive doublets for optoelectronic integrated systems

Zhiping Zhou and Timothy J. Drabik
Appl. Opt. 34(17) 3048-3054 (1995)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Supplementary Material (1)

» Media 1: MOV (415 KB)     

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription