110-GHz, 50%-efficiency mushroom-mesa waveguide p-i-n photodiode for a 1.55-/spl mu/m wavelength

  title={110-GHz, 50%-efficiency mushroom-mesa waveguide p-i-n photodiode for a 1.55-/spl mu/m wavelength},
  author={Kazumi Kato and A. Kozen and Yoshifumi Muramoto and Y. Itaya and Tadao Nagatsuma and M. Yaita},
  journal={IEEE Photonics Technology Letters},
A mushroom-mesa structure is proposed to reduce the CR-time constant which originates from the waveguide photodiode structure. Experimental results at a 1.55-/spl mu/m wavelength show that the multimode waveguide p-i-n photodiode with mushroom-mesa structure has an electrical 3-dB bandwidth of more than 75 GHz in the frequency domain and an electrical 3-dB bandwidth of 110 GHz in the time domain. The external quantum efficiency is 50% or 0.63 A/W, which leads to a record bandwidth-efficiency… CONTINUE READING

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