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

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Abstract

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.

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Acknowledgments

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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Authors and Affiliations

  1. Electrical Engineering Department, University of California Los Angeles, 420 Westwood Plaza, Los Angeles, CA, 90095, USA

    Shang-Hua Yang & Mona Jarrahi

  2. Electrical Engineering and Computer Science Department, University of Michigan, 1301 Beal Ave, Ann Arbor, MI, 48109, USA

    Shang-Hua Yang & Mona Jarrahi

  3. Electrical and Computer Engineering Department, University of Texas at Austin, 10100 Burnet Road, Austin, TX, 78758, USA

    Rodolfo Salas, Erica M. Krivoy, Hari P. Nair & Seth R. Bank

Authors
  1. Shang-Hua Yang
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  2. Rodolfo Salas
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  3. Erica M. Krivoy
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  4. Hari P. Nair
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  5. Seth R. Bank
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  6. Mona Jarrahi
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Correspondence to Mona Jarrahi.

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Yang, SH., Salas, R., Krivoy, E.M. et al. Characterization of ErAs:GaAs and LuAs:GaAs Superlattice Structures for Continuous-Wave Terahertz Wave Generation through Plasmonic Photomixing. J Infrared Milli Terahz Waves 37, 640–648 (2016). https://doi.org/10.1007/s10762-016-0255-z

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  • DOI: https://doi.org/10.1007/s10762-016-0255-z

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