InGaAs nano-photodetectors based on photonic crystal waveguide including ultracompact buried heterostructure.
Opt Express
; 21(16): 19022-8, 2013 Aug 12.
Article
em En
| MEDLINE
| ID: mdl-23938817
ABSTRACT
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 ~1 A/W was achieved for the 3.4-µm-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.
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MEDLINE
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En
Ano de publicação:
2013
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Article