Metamaterial nanomachines driven by heat, sound, electric and magnetic fields, and light

We review recent advances in the physics and technology of plasmonic and dielectric nanomechanical metamaterials, wherein optical and mechanical resonances can be coupled to provide a plethora of dynamic photonic functionalities. External electric, magnetic, thermal, acoustic and optical stimuli drive pico/nanometric displacements of the metamaterial building blocks, modulating optical properties at MHz frequencies.