Journal
OPTICS EXPRESS
Volume 21, Issue 16, Pages 19022-19028Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.019022
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- New Energy and Industrial Technology Development Organization (NEDO)
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Ultrasmall InGaAs photodetectors based on a photonic crystal waveguide with a buried heterostructure (BH) were demonstrated for the first time. A sufficiently high DC responsivity of similar to 1 A/W was achieved for the 3.4-mu m-long detector. The dynamic response revealed a 3-dB bandwidth of 6 GHz and a 10-Gb/s eye pattern. These results were thanks to the strong confinement of both photons and carriers in a small BH and will pave the way for unprecedented nano-photodetectors with a high quantum efficiency and small capacitance. Our device potentially has an ultrasmall junction capacitance of much less than 1 fF and may enable us to eliminate electrical amplifiers for future optical receivers and subsequent ultralow-power optical links on a chip. (c) 2013 Optical Society of America
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