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Application of dopant segregation to metal-germanium-metal photodetectors and its dark current suppression mechanism
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10.1063/1.2841061
/content/aip/journal/apl/92/5/10.1063/1.2841061
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/5/10.1063/1.2841061
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of cross section of MGM-PD (inner electrodes width: ; outer electrodes width: ). DS schemes for MGM-PDs: (1) non-DS (with no DS in both inner and outer electrodes), (2) pp-DS (with B DS in both inner and outer electrodes), (3) np-DS (with As DS in inner electrode and B DS in outer electrode), and (4) nn-DS (with As DS in both inner and outer electrodes).

Image of FIG. 2.
FIG. 2.

Dark current comparison between MGM-PDs with different DS strategies.

Image of FIG. 3.
FIG. 3.

Schematic conduction and valence band profile in DS-MGM-PD with/without dopant segregation in two NiGe electrodes at positive bias for (a) MGM-PD without DS (non-DS), (b) MGM-PD with B segregation in two electrodes (pp-DS), (c) MGM-PD with B and As segregated separately in two NiGe electrodes (np-DS), and (d) MGM-PD with As segregation in two electrodes (nn-DS).

Image of FIG. 4.
FIG. 4.

Measured photocurrent at wavelength of for DS-MGM-PD with nn-DS and np-DS. The inset is the photocurrent excluding dark current.

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/content/aip/journal/apl/92/5/10.1063/1.2841061
2008-02-06
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Application of dopant segregation to metal-germanium-metal photodetectors and its dark current suppression mechanism
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/5/10.1063/1.2841061
10.1063/1.2841061
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