High-speed measurement of the response time of a GaAs/AlxGa1−xAs multiquantum-well long-wavelength infrared detector

Abstract
We have measured the response time of a GaAs/Alx Ga1−x As multiquantum well infrared detector (at a wavelength of λ=6.4 μm). The intrinsic rise time is determined to be less than 300 ps.