3D-integration of a log spiral antenna onto a dual grating-gate plasmon-resonant terahertz emitter for high-directivity radiation

H. C. Kang, T. Nishimura, T. Komori, T. Mori, N. Watanabe, T. Asano, T. Otsuji

Research output: Contribution to journalArticlepeer-review

Abstract

We report a high-directivity plasmon-resonant terahertz (THz) emitter (PRE) incorporating a 3D-integrated antenna complex. The emitter structure is based on a high electron mobility transistor having unique doubly interdigitated grating gates as a broadband THz antenna that can convert non-radiative plasmons to radiative electromagnetic waves. Due to the sub-wavelength aperture of practical grating-antenna dimension, however, present structure of PRE exhibits undesirable diffraction effect, resulting in poor directivity. We developed a new device structure featuring a 3D-integration of tightly-coupled multiple-antenna complex to improve the directivity. The directivity of a new device was dramatically improved by a factor of 5.7 over the frequencies from 1.8 to 4.0 THz.

Original languageEnglish
Article number012070
JournalJournal of Physics: Conference Series
Volume193
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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