InGaAs nano-photodiode enhanced using polarization-insensitive surface-plasmon antennas

Daisuke Okamoto*, Junichi Fujikata, Keishi Ohashi

*この研究の対応する著者

研究成果: Article査読

5 被引用数 (Scopus)

抄録

We propose InGaAs nano-photodiodes incorporated with a ring-type polarization-insensitive surface-plasmon (SP) antenna, which consists of gold concentric-ring gratings. This ring antenna induces SP resonance for any polarization of incident light and enhances light absorption in a thin InGaAs layer owing to its symmetric structure. Finite-difference time-domain simulations suggest that the carefully designed ring SP antenna can achieve a quantum efficiency of more than 70% for a wide wavelength range and a maximum efficiency of about 80%. A 3 dB bandwidth of 21 GHz and an external responsivity of 0.39A/W were experimentally demonstrated at a 1.55 μm wavelength.

本文言語English
論文番号120201
ジャーナルJapanese journal of applied physics
50
12
DOI
出版ステータスPublished - 2011 12 1
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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