Evgenya Ivanovna Simakov (née Smirnova) is a Russian-American physicist whose research has involved photonic crystals, metamaterials with engineered band gaps that can be used to suppress unwanted resonances in particle accelerators.[1] She has also worked on the design of small portable particle accelerators,[2] and the use of nanoscale arrays of diamonds to control the shape of electron beams.[3] She is a researcher at the Los Alamos National Laboratory.