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Femtosecond switching of infrared light using a plasmonic cadmium oxide perfect absorber

Yang, Yuanmu Y.; Kelly, Kyle; Sachet, Edward; Campione, Salvatore; Luk, Ting S.; Maria, Jon P.; Sinclair, Michael B.; Brener, Igal B.

Using a high-electron-mobility cadmium oxide perfect absorber and intraband optical pumping, we experimentally demonstrate a reflective polarizer with a polarization extinction ratio of 91 that can be switched on and off within 800 fs.