Abstract

The use of GaMnAs as the emitter of an internal-photoemission (IPE) photodetector is studied. As a result of significantly high concentration of holes, GaMnAs-based IPE detector resembles a Schottky-barrier detector, which has the higher absorption and thus enhanced spectral response by comparing with the previously reported $p$ -type GaAs/AlGaAs detectors. A GaMnAs/AlGaAs detector is expected to fully cover the 3–5- $\mu \text{m}$ range of detection. The theoretical value of the responsibility is 0.0133 A/W at 3.5 $\mu \text{m}$ .

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