Two-Wave Laser Stereolithography for Fabrication of IR Sensors for Surface-Enhanced Spectroscopy

The results of applying two-photon femtosecond laser photopolymerization for fabrication of structures for sensitive IR sensors are reported. Two methods of sensor fabrication, a two-wave laser stereolithography and an electron-beam lithography, are compared. The possibility of applying the obtained structures for investigation of the effect of surface-enhanced IR absorption (SEIRA) with a STED-compatible oligomer pentaerythritol tetraacrylate (PETTA) as an analytical layer is demonstrated.