Sub-fF-Capacitance Photonic-Crystal Photodetector Towards fJ/bit On-Chip Receiver

Kengo NOZAKI; Shinji MATSUO; Koji TAKEDA; Takuro FUJII; Masaaki ONO; Abdul SHAKOOR; Eiichi KURAMOCHI; Masaya NOTOMI

doi:10.1587/transele.E100.C.750

Joint Special Section on Opto-electronics and Communications for Future Optical Network

Sub-fF-Capacitance Photonic-Crystal Photodetector Towards fJ/bit On-Chip Receiver

Kengo NOZAKI, Shinji MATSUO, Koji TAKEDA, Takuro FUJII, Masaaki ONO, Abdul SHAKOOR, Eiichi KURAMOCHI, Masaya NOTOMI

Author information

Kengo NOZAKI
Nanophotonics Center, NTT Corporation
NTT Basic Research Laboratories, NTT Corporation
Shinji MATSUO
Nanophotonics Center, NTT Corporation
NTT Device Technology Laboratories, NTT Corporation
Koji TAKEDA
Nanophotonics Center, NTT Corporation
NTT Device Technology Laboratories, NTT Corporation
Takuro FUJII
Nanophotonics Center, NTT Corporation
NTT Device Technology Laboratories, NTT Corporation
Masaaki ONO
Nanophotonics Center, NTT Corporation
NTT Basic Research Laboratories, NTT Corporation
Abdul SHAKOOR
Nanophotonics Center, NTT Corporation
NTT Basic Research Laboratories, NTT Corporation
Eiichi KURAMOCHI
Nanophotonics Center, NTT Corporation
NTT Basic Research Laboratories, NTT Corporation
Masaya NOTOMI
Nanophotonics Center, NTT Corporation
NTT Basic Research Laboratories, NTT Corporation

Keywords: photonic crystal waveguide, photodetector, buried heterostructure, optical interconnection

JOURNAL FREE ACCESS

2017 Volume E100.C Issue 10 Pages 750-758

DOI https://doi.org/10.1587/transele.E100.C.750

Details

Abstract

An ultra-compact InGaAs photodetector (PD) is demonstrated based on a photonic crystal (PhC) waveguide to meet the demand for a photoreceiver for future dense photonic integration. Although the PhC-PD has a length of only 1.7µm and a capacitance of less than 1fF, a high responsivity of 1A/W was observed both theoretically and experimentally. This low capacitance PD allows us to expect a resistor-loaded receiver to be realized that requires no electrical amplifiers. We fabricated a resistor-loaded PhC-PD for light-to-voltage conversion, and demonstrated a kV/W efficiency with a GHz bandwidth without using amplifiers. This will lead to a photoreceiver with an ultralow energy consumption of less than 1fJ/bit, which is a step along the road to achieving a dense photonic network and processor on a chip.

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