Structure-sensitive design for wider tunable operation of terahertz plasmon-resonant photomixer

Mitsuhiro Hanabe, Takuya Nishimura, Masaki Miyamoto, Taiichi Otsuji, Eiichi Sano

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We performed numerical analyses on structure sensitive field emission properties of our proposing plasmon resonant photomixer (PRX) in the terahertz range. The photomixer incorporates doubly interdigitated grating strips for gate electrodes and a vertical resonator structure for realizing highly efficient terahertz emission even at room temperature. We investigated the dependence of total field emission properties of PRX's on their material and dimension parameters. Introduction of low-conductive gate electrodes and ac-coupled 2D periodic plasmon gratings with depleted connecting portions are effective for expanding its lower cutoff frequency. The cutoff frequency, which is around 1.0 THz in standard metal-gates configuration, is expanded to less than 500 GHz. The output intensity could also be amplified more than double. On the other hand, a shorter vertical cavity is effective for expanding its upper cutoff frequency, which is expanded close to vertical resonant frequency, while maintaining the lower cutoff frequency. The combination of these design rules can realize much broader bandwidth operation.

Original languageEnglish
Pages (from-to)985-992
Number of pages8
JournalIEICE Transactions on Electronics
Issue number7
Publication statusPublished - 2006 Jul


  • Grating
  • HEMT
  • Photomixer
  • Plasmon resonance
  • Terahertz

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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