Photodetector using surface-plasmon antenna for optical interconnect

Keishi Ohashi, Junichi Fujikata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
Pages21-32
Number of pages12
Volume1145
Publication statusPublished - 2008
Externally publishedYes
Event2008 MRS Fall Meeting - Boston, MA
Duration: 2008 Dec 12008 Dec 5

Other

Other2008 MRS Fall Meeting
CityBoston, MA
Period08/12/108/12/5

Fingerprint

optical interconnects
Optical interconnects
Photodetectors
Photodiodes
photometers
near fields
antennas
photodiodes
Antennas
chips
large scale integration
Photonic devices
Bias voltage
Full width at half maximum
Impulse response
Waveguides
Diffraction
impulses
Semiconductor materials
depletion

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Ohashi, K., & Fujikata, J. (2008). Photodetector using surface-plasmon antenna for optical interconnect. In Materials Research Society Symposium Proceedings (Vol. 1145, pp. 21-32)

Photodetector using surface-plasmon antenna for optical interconnect. / Ohashi, Keishi; Fujikata, Junichi.

Materials Research Society Symposium Proceedings. Vol. 1145 2008. p. 21-32.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ohashi, K & Fujikata, J 2008, Photodetector using surface-plasmon antenna for optical interconnect. in Materials Research Society Symposium Proceedings. vol. 1145, pp. 21-32, 2008 MRS Fall Meeting, Boston, MA, 08/12/1.
Ohashi K, Fujikata J. Photodetector using surface-plasmon antenna for optical interconnect. In Materials Research Society Symposium Proceedings. Vol. 1145. 2008. p. 21-32
Ohashi, Keishi ; Fujikata, Junichi. / Photodetector using surface-plasmon antenna for optical interconnect. Materials Research Society Symposium Proceedings. Vol. 1145 2008. pp. 21-32
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