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The effect of symmetry on resonant and nonresonant photoresponses in a field-effect terahertz detector

Journal Article


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Abstract


  • The effect of the symmetries in the terahertz (THz) field distribution and the field-effect channel on THz photoresponse is examined. Resonant excitation of cavity plasmon modes and nonresonant self-mixing of THz waves are demonstrated in a GaN/AlGaN two-dimensional electron gas with symmetrically designed nanogates, antennas, and filters. We found that the self-mixing signal can be effectively suppressed by the symmetric design and the resonant response benefits from the residual asymmetry. The findings suggest that a single detector may provide both high sensitivity from the self-mixing mechanism and spectral resolution from the resonant response by optimizing the degree of geometrical and/or electronic symmetries.

Authors


  •   Sun, J D. (external author)
  •   Qin, H (external author)
  •   Lewis, R A.
  •   Yang, Xiaoyu (external author)
  •   Sun, Y F. (external author)
  •   Zhang, Zhenpu (external author)
  •   Li, Xianghu (external author)
  •   Zhang, Xiaoqin (external author)
  •   Cai, Y (external author)
  •   Wu, D M. (external author)
  •   Zhang, B S. (external author)

Publication Date


  • 2015

Citation


  • Sun, J. D., Qin, H., Lewis, R. A., Yang, X. X., Sun, Y. F., Zhang, Z. P., Li, X. X., Zhang, X. Y., Cai, Y., Wu, D. M., Zhang, B. S. et al (2015). The effect of symmetry on resonant and nonresonant photoresponses in a field-effect terahertz detector. Applied Physics Letters, 106 (3), 031119-1-031119-5.

Scopus Eid


  • 2-s2.0-84923765652

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2598&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1596

Start Page


  • 031119-1

End Page


  • 031119-5

Volume


  • 106

Issue


  • 3

Place Of Publication


  • http://dx.doi.org/10.1063/1.4906536

Abstract


  • The effect of the symmetries in the terahertz (THz) field distribution and the field-effect channel on THz photoresponse is examined. Resonant excitation of cavity plasmon modes and nonresonant self-mixing of THz waves are demonstrated in a GaN/AlGaN two-dimensional electron gas with symmetrically designed nanogates, antennas, and filters. We found that the self-mixing signal can be effectively suppressed by the symmetric design and the resonant response benefits from the residual asymmetry. The findings suggest that a single detector may provide both high sensitivity from the self-mixing mechanism and spectral resolution from the resonant response by optimizing the degree of geometrical and/or electronic symmetries.

Authors


  •   Sun, J D. (external author)
  •   Qin, H (external author)
  •   Lewis, R A.
  •   Yang, Xiaoyu (external author)
  •   Sun, Y F. (external author)
  •   Zhang, Zhenpu (external author)
  •   Li, Xianghu (external author)
  •   Zhang, Xiaoqin (external author)
  •   Cai, Y (external author)
  •   Wu, D M. (external author)
  •   Zhang, B S. (external author)

Publication Date


  • 2015

Citation


  • Sun, J. D., Qin, H., Lewis, R. A., Yang, X. X., Sun, Y. F., Zhang, Z. P., Li, X. X., Zhang, X. Y., Cai, Y., Wu, D. M., Zhang, B. S. et al (2015). The effect of symmetry on resonant and nonresonant photoresponses in a field-effect terahertz detector. Applied Physics Letters, 106 (3), 031119-1-031119-5.

Scopus Eid


  • 2-s2.0-84923765652

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2598&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1596

Start Page


  • 031119-1

End Page


  • 031119-5

Volume


  • 106

Issue


  • 3

Place Of Publication


  • http://dx.doi.org/10.1063/1.4906536