We have observed an optically induced decrease in absorption near the band‐gap energy in a single‐heterostructure Schottky barrier depletion region. Photogenerated carriers created and trapped in the unbiased depletion region cause a dynamic decrease in the absorption. This depletion region electric‐field absorption modulator (DREAM) exhibits nonlinear optical absorption which relies upon carrier transport induced by an electric field without an external circuit applied to the device. We demonstrate a factor of two change in absorption at peak powers of 2 mW (0.2 W/cm2).

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