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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 8, Iss. 6 — Jun. 27, 2013

120 nm resolution and 55 nm structure size in STED-lithography

Richard Wollhofen, Julia Katzmann, Calin Hrelescu, Jaroslaw Jacak, and Thomas A. Klar  »View Author Affiliations


Optics Express, Vol. 21, Issue 9, pp. 10831-10840 (2013)
http://dx.doi.org/10.1364/OE.21.010831


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Abstract

Two–photon direct laser writing (DLW) lithography is limited in the achievable structure size as well as in structure resolution. Adding stimulated emission depletion (STED) to DLW allowed overcoming both restrictions. We now push both to new limits. Using visible light for two-photon DLW (780 nm) and STED (532 nm), we obtain lateral structure sizes of 55 nm, a Sparrow limit of around 100 nm and we present two clearly separated lines spaced only 120 nm apart. The photo-resist used in these experiments is a mixture of tri- and tetra-acrylates and 7-Diethylamino-3-thenoylcoumarin as a photo-starter which can be readily quenched via STED.

© 2013 OSA

OCIS Codes
(180.0180) Microscopy : Microscopy
(110.4235) Imaging systems : Nanolithography
(220.4241) Optical design and fabrication : Nanostructure fabrication

ToC Category:
Microscopy

History
Original Manuscript: January 2, 2013
Revised Manuscript: March 29, 2013
Manuscript Accepted: March 31, 2013
Published: April 25, 2013

Virtual Issues
Vol. 8, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Richard Wollhofen, Julia Katzmann, Calin Hrelescu, Jaroslaw Jacak, and Thomas A. Klar, "120 nm resolution and 55 nm structure size in STED-lithography," Opt. Express 21, 10831-10840 (2013)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-21-9-10831


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