Laser-induced forward transfer (LIFT) is a direct-writing technique enabling deposition of a film. In addition, a single dot smaller than the laser wavelength can be deposited at small shot energy, and the case is called as laser-induced dot transfer (LIDT). In conventional LIDT experiments, multi-shots with step scanning have been used to form array structures, which are useful in plasmonics, pho-chemistry, light harvest, etc..
On the other hand, interference laser processing can achieve an arrayed process and generate a periodic structure in a single shot. In this presentation, the results of LIDT technique which uses a femtosecond laser interference pattern will be presented. As a result, an array of Au nanodots with 3.6 m period was successfully deposited, producing the following unit structures: a single dot, adjoining dots, and stacking dots.
This new technique produces high-purity, catalyst-free nanodots in array that do not require post-cleaning or alignment processes.
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