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- W3004580447 abstract "A high-power germanium photodetector is designed and fabricated using a cold-wall ultrahigh vacuum chemical vapor deposition. A back-to-back dual-absorption structure improves high-power characteristics by reducing the space-charge effect. Compared to a typical p-i-n photodetector, the saturated photocurrent of the back-to-back dual-absorption photodetector is improved from 16.2 to 21.3 mA at <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mo>−<!-- − --></mml:mo> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mn>3</mml:mn> </mml:mrow> <mml:mspace width=thickmathspace /> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi mathvariant=normal>V</mml:mi> </mml:mrow> </mml:math> . At a bias voltage of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mo>−<!-- − --></mml:mo> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mn>1</mml:mn> </mml:mrow> <mml:mspace width=thickmathspace /> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi mathvariant=normal>V</mml:mi> </mml:mrow> </mml:math> , the dark current is 1.31 µA. The optical responsivities are 0.31 and 0.52 A/W at 1550 and 1310 nm, respectively. The 3 dB bandwidth of 4.14 GHz is achieved at <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mo>−<!-- − --></mml:mo> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mn>3</mml:mn> </mml:mrow> <mml:mspace width=thickmathspace /> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi mathvariant=normal>V</mml:mi> </mml:mrow> </mml:math> . Theoretically, the 3 dB bandwidth can be further optimized in future device fabrication." @default.
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- W3004580447 date "2020-03-04" @default.
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- W3004580447 title "High-power back-to-back dual-absorption germanium photodetector" @default.
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- W3004580447 doi "https://doi.org/10.1364/ol.388011" @default.
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