Ultrafast frequency-agile terahertz devices using methylammonium lead halide perovskites.

ABSTRACT: The ability to control the response of metamaterial structures can facilitate the development of new terahertz devices, with applications in spectroscopy and communications. We demonstrate ultrafast frequency-agile terahertz metamaterial devices that enable such a capability, in which multiple perovskites can be patterned in each unit cell with micrometer-scale precision. To accomplish this, we developed a fabrication technique that shields already deposited perovskites from organic solvents, allowing for multiple perovskites to be patterned in close proximity. By doing so, we demonstrate tuning of the terahertz resonant response that is based not only on the optical pump fluence but also on the optical wavelength. Because polycrystalline perovskites have subnanosecond photocarrier recombi

SUBMITTER: Chanana A 

PROVIDER: S-EPMC5935473 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature