Wang, T.T.WangNguyen, V.H.V.H.NguyenBuchenauer, A.A.BuchenauerSchnakenberg, U.U.SchnakenbergTaubner, T.T.Taubner2022-03-042022-03-042013https://publica.fraunhofer.de/handle/publica/23310610.1364/OE.21.0090052-s2.0-84875972789We investigate surface enhanced infrared absorption (SEIRA) spectroscopy with gold strip gratings made by standard optical lithography. By exciting surface plasmon polaritons on both air-gold and gold-substrate interfaces, the resonance of the 1D gratings is linearly tunable with the grating period. With the field enhancement at the edge of the gold strips, a SEIRA enhancement factor more than 6000 for PMMA molecules is achieved. The strong SEIRA enhancement together with the easy fabrication makes the gold strip grating a promising candidate for SEIRA experiments.en621621journal article