Schematic drawings of the two main configurations used for the xerogel irradiation. (a) With a femtosecond infrared laser and (b) with a CW visible laser. In both cases, the sample is mounted on a 3-axis stage allowing to draw motifs or dense arrays with a micrometer precision.
Capoen et al. Nanoscale Research Letters 2013 8:266 doi:10.1186/1556-276X-8-266