title: Ultrafast laser-induced microstructure/nanostructure replication and optical properties.
abstract: This paper demonstrates replication of ultrafast laser-induced micro/nano surface textures on poly(dimethylsiloxane) (PDMS). The surface texture replication process reduces the processing steps for microtexturing while improving light trapping. Two methods are demonstrated to replicate surface microtexture, a simple mold method and an embossing method. The laser microtextured silicon and titanium surfaces with micro to nanoscale features have been successfully replicated. Optical characterization of the replicated microtextured PDMS surfaces is performed and the results agree with model predictions. The replicated microtextured PDMS film is applied on a silicon surface and optical characterization shows that surface reflectance can be suppressed over 55% compared to the control value.
authors.affiliation: Charles L. Brown Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, Virginia 22904, USA.
authors.forename: Paul O
authors.initials: PO
authors.lastname: Caffrey
authors.forename: Barada K
authors.initials: BK
authors.lastname: Nayak
authors.forename: Mool C
authors.initials: MC
authors.lastname: Gupta