Characterization of ErAs:GaAs and LuAs:GaAs Superlattice Structures for Continuous-Wave Terahertz Wave Generation through Plasmonic Photomixing

  • Shang-Hua Yang
  • Rodolfo Salas
  • Erica M. Krivoy
  • Hari P. Nair
  • Seth R. Bank
  • Mona Jarrahi


We investigate the impact of ErAs:GaAs and LuAs:GaAs superlattice structures with different LuAs/ErAs nanoparticle depositions and superlattice geometries on terahertz radiation properties of plasmonic photomixers operating at a 780-nm optical wavelength. Our analysis indicates the crucial impact of carrier drift velocity and carrier lifetime on the performance of plasmonic photomixers. While higher carrier drift velocities enable higher optical-to-terahertz conversion efficiencies by offering higher quantum efficiencies, shorter carrier lifetimes allow achieving higher optical-to-terahertz conversion efficiencies by mitigating the negative impact of destructive terahertz radiation from slow photocarriers and preventing the carrier screening effect.


Photomixers Plasmonics Terahertz 



The authors gratefully acknowledge the financial support from Presidential Early Career Award for Scientists and Engineers (# N00014-14-1-0573 and # W911NF-09-1-0434), NSF CAREER Award (# N00014-11-1-0096), and ONR Young Investigator Award (# N00014-12-1-0947).


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Shang-Hua Yang
    • 1
    • 2
  • Rodolfo Salas
    • 3
  • Erica M. Krivoy
    • 3
  • Hari P. Nair
    • 3
  • Seth R. Bank
    • 3
  • Mona Jarrahi
    • 1
    • 2
  1. 1.Electrical Engineering DepartmentUniversity of California Los AngelesLos AngelesUSA
  2. 2.Electrical Engineering and Computer Science DepartmentUniversity of MichiganAnn ArborUSA
  3. 3.Electrical and Computer Engineering DepartmentUniversity of Texas at AustinAustinUSA

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