Photodetector using surface-plasmon antenna for optical interconnect

Keishi Ohashi*, Junichi Fujikata


研究成果: Conference contribution

3 被引用数 (Scopus)


We used a surface-plasmon antenna to obtain small photodetectors for LSI on-chip optical interconnection by using near-field light generated by the antenna. Such near-field devices are not constrained by the diffraction limit and they offer an approach to integrated nanoscale photonic devices. A small semiconductor structure is located near the antenna to absorb the near-field light. This structure can be made as small as the Schottky depletion layer, so the separation between electrodes can be reduced to almost the size of the near-field region. We have demonstrated a "Si nano-photodiode" or plasmon photodiode that uses the near-field localized in a subwavelength region, which is usually relatively large in size because of the long absorption length for Si (∼10 μm at a wavelength of ∼800 nm). The Si nano-photodiode has a fast impulse response with a full-width at half-maximum of ∼20 ps even when the bias voltage is small (∼1 V or less). We demonstrated an on-chip optical interconnect chip to operate circuitry in an LSI chip by using waveguide-coupled Si nano-photodiodes.

ホスト出版物のタイトルApplications of Group IV Semiconductor Nanostructures
出版ステータスPublished - 2008 12月 1
イベント2008 MRS Fall Meeting - Boston, MA, United States
継続期間: 2008 12月 12008 12月 5


名前Materials Research Society Symposium Proceedings


Conference2008 MRS Fall Meeting
国/地域United States
CityBoston, MA

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学


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