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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 14,
  • Issue 2,
  • pp. 022501-
  • (2016)

Short-wave infrared detector with double barrier structure and low dark current density

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Abstract

Short-wave infrared (SWIR) detectors combining AlAs/In0.53Ga0.47As/AlAs double barrier structure (DBS) with In0.53Ga0.47As absorption layer are fabricated by molecular beam epitaxy. By adding a p-charge layer, the dark current density of the detector is lowered by 3 orders of magnitude. The responsivity of the detector is tested at room temperature, which reaches 6000 A/W when the power of the incident light is 0.7 nW. The noise equivalent power (NEP) of the detector at 5 kHz is measured to be 3.77×10−14 W/Hz1/2 at room temperature.

© 2016 Chinese Laser Press

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