High-performance femtosecond laser fabrication of plasmon elements using DOE

Broadband optically tunable diffractive optical elements (DOEs) were used to generate structured optical beams with considerably increased focal depth. Such beams were justified for high-performance ablative and translative printing of various plasmonic elements via high-efficiency multiplexing of femtosecond Gaussian-shaped laser beams to multiple micro-beams. The increased focal depth of such DOEs and easy-to-implement optical structuring of output beams as well as their high multiplexing efficiency make them very useful devices for high-performance laser fabrication of surface-enhanced infrared absorption sensors.