Doped metal oxides are plasmonic materials that boast both synthetic and postsynthetic spectral tunability. They have already enabled promising smart window and optoelectronic technologies and have been proposed for use in surface enhanced infrared absorption spectroscopy. Coupling between relatively broad plasmonic resonances and sharp vibrational resonances of molecular bonds can result in fano-type interference ranging from plasmon-induced transparency to plasmon-enhanced absorption.
