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Time-resolved photocurrents in quantum well/dot infrared photodetectors with different optical coupling structures
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10.1063/1.3678637
/content/aip/journal/apl/100/4/10.1063/1.3678637
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/4/10.1063/1.3678637
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

xz cross sections (y = 3.95 μm) of one pixel in a (a) conventional grating and (b) concave reflector structure. The length unit is μm. Insets in (a) and (b) show the xy cross sections.

Image of FIG. 2.
FIG. 2.

(Color online) Photocurrents from three absorbing layers in the pixel structures of Fig. 1 excited by a radiation pulse (wavelength 2 ∼ 10 μm). (a-c): reflective grating and (d-f): concave. Thin solid lines are Jx (t), thick solid lines are Jy (t), and dash lines are Jz (t). T (vertical dash lines) denotes the time when the pulse reaches the metal (z = 9.75 μm in Fig. 1).

Image of FIG. 3.
FIG. 3.

(Color online) Corner diffraction from local pixel and crosstalk from neighboring pixels in the grating structure. (a) Schematics and (b) spatial distribution of the Ez amplitude excited by a radiation pulse.

Image of FIG. 4.
FIG. 4.

(Color online) Spatial distributions of (a,b,c) Ex and (a’,b’,c’) Ez in the concave pixel structure at three different times excited by a radiation pulse. Arrows mark the motion of the electric field.

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/content/aip/journal/apl/100/4/10.1063/1.3678637
2012-01-23
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Time-resolved photocurrents in quantum well/dot infrared photodetectors with different optical coupling structures
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/4/10.1063/1.3678637
10.1063/1.3678637
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