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 300 μW. This is the highest-reported terahertz radiation power from a photoconductive emitter operating at telecommunication optical wavelengths.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 07, 2016
- Source ID
- 10.1063/1.4967440
Entities
People
- Hong Lu
- Mona Jarrahi
- Nezih Tolga Yardimci
Organizations
- Nanjing University
- National Institutes of Health
- Office of Naval Research Global
- University of California, Los Angeles