title: High power telecommunication-compatible photoconductive terahertz emitters based on plasmonic nano-antenna arrays.
abstract: We present a high-power and broadband photoconductive terahertz emitter operating at telecommunication optical wavelengths, at which compact and high-performance fiber lasers are commercially available. The presented terahertz emitter utilizes an ErAs:InGaAs substrate to achieve high resistivity and short carrier lifetime characteristics required for robust operation at telecommunication optical wavelengths. It also uses a two-dimensional array of plasmonic nano-antennas to offer significantly higher optical-to-terahertz conversion efficiencies compared to the conventional photoconductive emitters, while maintaining broad operation bandwidths. We experimentally demonstrate pulsed terahertz radiation over 0.1-5 THz frequency range with the power levels as high as 300μW. This is the highest-reported terahertz radiation power from a photoconductive emitter operating at telecommunication optical wavelengths.
authors.affiliation: Electrical Engineering Department, University of California-Los Angeles , Los Angeles, California 90095, USA.
authors.forename: Nezih Tolga
authors.initials: NT
authors.lastname: Yardimci
authors.affiliation: Department of Materials Science and Engineering, Nanjing University , Nanjing 210093, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Lu
authors.affiliation: Electrical Engineering Department, University of California-Los Angeles , Los Angeles, California 90095, USA.
authors.forename: Mona
authors.initials: M
authors.lastname: Jarrahi