One- and two-dimensional photo-imprinted diffraction gratings for manipulating terahertz waves
arXiv:1406.0099 · doi:10.1063/1.4813620
Abstract
Emerging technology based on artificial materials containing metallic structures has raised the prospect for unprecedented control of terahertz waves through components like filters, absorbers and polarizers. The functionality of these devices is static by the very nature of their metallic or polaritonic composition, although some degree of tunability can be achieved by incorporating electrically biased semiconductors. Here, we demonstrate a photonic structure by projecting the optical image of a metal mask onto a thin GaAs substrate using a femtosecond pulsed laser source. We show that the resulting high-contrast pattern of photo- excited carriers can create diffractive elements operating in transmission. With the metal mask replaced by a digital micromirror device, our photo-imprinted photonic structures provide a route to terahertz components with reconfigurable functionality.
12 pages, 5 figures
References in corpus (9)
- A Perfect Metamaterial Absorber
- Past Achievements and Future Challenges in 3D Photonic Metamaterials
- Wide-angle perfect absorber/thermal emitter in the THz regime
- A comparison of graphene, superconductors and metals as conductors for metamaterials and plasmonics
- A unifying approach to left handed material design
- Femtosecond Population Inversion and Stimulated Emission of Dense Dirac Fermions in Graphene
- One- and two-dimensional photo-imprinted diffraction gratings for manipulating terahertz waves
- Switching nonlinearity in a superconductor-enhanced metamaterial
- Reversible modulation and ultrafast dynamics of THz resonances in strongly photoexcited metamaterials
Cited by in corpus (6)
- Broadband terahertz generation from metamaterials
- Ultrafast terahertz probes of interacting dark excitons in chirality-specific semiconducting single-walled carbon nanotubes
- One- and two-dimensional photo-imprinted diffraction gratings for manipulating terahertz waves
- Extrinsic electromagnetic chirality in all-photodesigned one-dimensional THz metamaterials
- A new perspective on materials for plasmonics
- Photo-generated THz antennas: All-optical control of plasmonic materials