Optics Lab

Optoelectronic structures such as photonic band gap (PBG) and metamaterials are artificial materials engineered to create extraordinary physical properties; it is difficult or impossible for them to exist in natural materials or chemical compounds. These materials often behave like a magnet, plasma gas, lens, band-pass filter, etc., depending on how their optical parameters, permittivity and permeability are designed. For instance, a fishnet structure, consisting of the sandwiched metal-dielectric-metal layer, is one of the simplest double negative metamaterials with negative refractive indexes at resonances. The negative field response can efficiently remove HOM/wakefields from a beam interaction area over the broad spectral range.