ABSTRACT
This chapter investigates recent breakthroughs in the development of broadband optical metamaterials and metasurfaces that illustrates how their exotic properties can be exploited for broadband applications. It introduces dispersion engineering as a powerful method for exploiting the resonant properties of metamaterials over broad wavelength ranges in order to enhance practical devices. The chapter examines how the metamaterial loss can be exploited for broadband absorption in the infrared (IR) regime. It also investigates broadband optical metasurfaces that can control the phase and polarization of a reflected wave. The dispersion-engineered metamaterial filter is extended to demonstrate a bifunctional metamaterial prism that both filters an incident wave and provides wavelength-dependent steering of the transmitted beam. The broadband metamaterial filter was fabricated by standard electron-beam lithography. Metasurfaces also exhibit reduced loss and less fabrication complexity as compared to three dimensional metamaterial devices, making them attractive for integration into practical optical systems.
