Fluorescent two-photon nanolithography

KUNIK, D.; LUDUEÑA, S.J.; COSTANTINO, S.; MARTÍNEZ, O.E.

JOURNAL OF MICROSCOPY-OXFORD

WILEY-BLACKWELL PUBLISHING, INC

Año: 2008 vol. 229 p. 540 - 544

0022-2720

Improving the excitation conditions in two-photon fluorescent lithography reduces the size of the fabricated structures to nanometre scales. We demonstrate that a precise control of the illumination profile and the scanning speed of the laser beam is enough to decrease the photo-polymerization volume of resins by orders of magnitude. This work also shows experimental evidence of surface effects that yield a different polymerization intensity threshold compared with bulk. Such phenomenon enables to perform a non-linear optical nanolithography in a simple way, allowing fast-prototyping procedures. We present a detailed study of the polymer growth process using fluorescence and atomic force microscopy. © 2008 The Authors.