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Coherent and tunable terahertz radiation from graphene surface plasmon polarirons excited by cyclotron electron beam

Journal Article


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Abstract


  • Terahertz (THz) radiation can revolutionize modern science and technology. To this date, it remains

    big challenges to develop intense, coherent and tunable THz radiation sources that can cover the

    whole THz frequency region either by means of only electronics (both vacuum electronics and

    semiconductor electronics) or of only photonics (lasers, for example, quantum cascade laser). Here

    we present a mechanism which can overcome these difficulties in THz radiation generation. Due to

    the natural periodicity of 2π of both the circular cylindrical graphene structure and cyclotron electron

    beam (CEB), the surface plasmon polaritions (SPPs) dispersion can cross the light line of dielectric,

    making transformation of SPPs into radiation immediately possible. The dual natural periodicity

    also brings significant excellences to the excitation and the transformation. The fundamental and

    hybrid SPPs modes can be excited and transformed into radiation. The excited SPPs propagate

    along the cyclotron trajectory together with the beam and gain energy from the beam continuously.

    The radiation density is enhanced over 300 times, up to 105 W/cm2. The radiation frequency can be

    widely tuned by adjusting the beam energy or chemical potential. This mechanism opens a way for

    developing desired THz radiation sources to cover the whole THz frequency regime.

Authors


  •   Zhao, Tao (external author)
  •   Gong, Sen (external author)
  •   Hu, Min (external author)
  •   Zhong, Renbin (external author)
  •   Liu, Diwei (external author)
  •   Chen, Xiaoxing (external author)
  •   Zhang, Ping (external author)
  •   Wang, Xinran (external author)
  •   Chao Zhang
  •   Wu, Peiheng (external author)
  •   Liu, Shenggang (external author)

Publication Date


  • 2015

Citation


  • Zhao, T., Gong, S., Hu, M., Zhong, R., Liu, D., Chen, X., Zhang, P., Wang, X., Zhang, C., Wu, P. & Liu, S. (2015). Coherent and tunable terahertz radiation from graphene surface plasmon polarirons excited by cyclotron electron beam. Scientific Reports, 5 16059-1-16059-8.

Scopus Eid


  • 2-s2.0-84946593367

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2989&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1987

Start Page


  • 16059-1

End Page


  • 16059-8

Volume


  • 5

Abstract


  • Terahertz (THz) radiation can revolutionize modern science and technology. To this date, it remains

    big challenges to develop intense, coherent and tunable THz radiation sources that can cover the

    whole THz frequency region either by means of only electronics (both vacuum electronics and

    semiconductor electronics) or of only photonics (lasers, for example, quantum cascade laser). Here

    we present a mechanism which can overcome these difficulties in THz radiation generation. Due to

    the natural periodicity of 2π of both the circular cylindrical graphene structure and cyclotron electron

    beam (CEB), the surface plasmon polaritions (SPPs) dispersion can cross the light line of dielectric,

    making transformation of SPPs into radiation immediately possible. The dual natural periodicity

    also brings significant excellences to the excitation and the transformation. The fundamental and

    hybrid SPPs modes can be excited and transformed into radiation. The excited SPPs propagate

    along the cyclotron trajectory together with the beam and gain energy from the beam continuously.

    The radiation density is enhanced over 300 times, up to 105 W/cm2. The radiation frequency can be

    widely tuned by adjusting the beam energy or chemical potential. This mechanism opens a way for

    developing desired THz radiation sources to cover the whole THz frequency regime.

Authors


  •   Zhao, Tao (external author)
  •   Gong, Sen (external author)
  •   Hu, Min (external author)
  •   Zhong, Renbin (external author)
  •   Liu, Diwei (external author)
  •   Chen, Xiaoxing (external author)
  •   Zhang, Ping (external author)
  •   Wang, Xinran (external author)
  •   Chao Zhang
  •   Wu, Peiheng (external author)
  •   Liu, Shenggang (external author)

Publication Date


  • 2015

Citation


  • Zhao, T., Gong, S., Hu, M., Zhong, R., Liu, D., Chen, X., Zhang, P., Wang, X., Zhang, C., Wu, P. & Liu, S. (2015). Coherent and tunable terahertz radiation from graphene surface plasmon polarirons excited by cyclotron electron beam. Scientific Reports, 5 16059-1-16059-8.

Scopus Eid


  • 2-s2.0-84946593367

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2989&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1987

Start Page


  • 16059-1

End Page


  • 16059-8

Volume


  • 5