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Telecommunication compatible terahertz emitters based on plasmonic nano-antenna arrays

We present a high-performance pulsed terahertz emitter based on a two-dimensional array of plasmonic nano-antennas, offering significantly higher radiation power levels compared to the state-of-the art. This significant performance enhancement is due to unique capabilities of nano-antenna arrays, inducing significantly stronger radiating dipole moments at terahertz frequencies. The presented terahertz emitter is fabricated on an ErAs:InGaAs substrate to operate at telecommunication optical wavelengths at which compact and high-performance optical sources are commercially available. We experimentally demonstrate record-high terahertz radiation power levels as high as 300 μW over 0.1-5 THz frequency range.