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Gain-length scaling in quantum dot/quantum well infrared photodetectors
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10.1063/1.3222856
/content/aip/journal/apl/95/9/10.1063/1.3222856
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/9/10.1063/1.3222856
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic drawing of the QDWIP structures; , 15, 25, and 35.

Image of FIG. 2.
FIG. 2.

Noise (left) and dark current (right) in the 5-period QDWIP as a function of bias at various operating temperatures.

Image of FIG. 3.
FIG. 3.

Noise (left) and dark current (right) in the 35-period QDWIP as a function of bias at various operating temperatures. For , the noise was below the measurement system limit and is not shown.

Image of FIG. 4.
FIG. 4.

Gain in the 5-period QDWIP as a function of bias at various operating temperatures. The fitting parameters (Ref. 9) in the calculation are: effective mass , length of the barrier layer 31 nm, , , saturation velocity , trap free mobility , , volume trap concentration , and continuum band trap depth . Additional fitting parameters for the re-emission effect are , , and .

Image of FIG. 5.
FIG. 5.

Gain in the 35-period QDWIP as a function of bias at various operating temperatures. The fitting parameters in the calculation are the same as described in Fig. 4. The expected GR gain curve at 200 K extrapolated from the experimental results is also shown.

Image of FIG. 6.
FIG. 6.

Comparison of the gain as a function of electric field among the different period QDWIPs at 150 K. The fitting parameters in the calculation are the same as described in Fig. 4.

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/content/aip/journal/apl/95/9/10.1063/1.3222856
2009-09-02
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Gain-length scaling in quantum dot/quantum well infrared photodetectors
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/9/10.1063/1.3222856
10.1063/1.3222856
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