Rapid direct laser writing of desired plasmonic nanostructures.

Optics letters

PubMedID: 28614316

Tong QC, Luong MH, Remmel J, Do MT, Nguyen DTT, Lai ND. Rapid direct laser writing of desired plasmonic nanostructures. Opt Lett. 2017;42(12):2382-2385.
We demonstrate a direct way to realize arbitrary gold nanostructures via a local dewetting method. This technique was based on the optically induced local thermal effect at the focusing region of a direct laser writing (DLW) system employing a green continuous-wave laser. The local high temperature allowed the creation of gold nano-islands only at the focusing area of the optical system. By moving the focusing spot, this DLW method allowed us to "write" desired two-dimensional gold patterns with a feature size down to sub-lambda. A heat model was also proposed to theoretically explain the localized heating process of the absorbing gold layer. The preliminary results were demonstrated for data storage and color printer applications.