Article ID Journal Published Year Pages File Type
1784807 Infrared Physics & Technology 2008 4 Pages PDF
Abstract

The effect of photocurrent amplification was observed in the type II isotype staggered-lineup N+-GaSb/n0-GaInAsSb single heterostructure. The illumination intensity influence to the gigantic photocurrent gain effect for applied bias voltage have been studied for this structures. A mechanism of photocurrent amplification in isotype GaSb/GaInAsSb structure due to hole confinement at the type II interface is observed, its magnitude being bias voltage and light intensity dependent. It is shown that the exponential dependence of the photocurrent on intensity confirm the photocurrent gain at small bias is due to modulation of a barrier transparency by the non-equilibrium holes trapped in the potential well in the type II interface as a previously predicted theoretically.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Atomic and Molecular Physics, and Optics
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