ABSTRACT
The devices are characterized by the following measurements: dark current, Fourier transform infrared (FTIR) spectral response, and 800 K calibrated blackbody response. Typical dark current densities, shown in Fig. 3(a) are very low Octark = 6x 10·10 A/cm2, T = 100 K, Vbias = 0.1 V), as is usually seen in QDIPs. The spectral response, shown in Fig. 3(b), was obtained at 78 K. The spectral response, which we believe originates from electron transitions from the ground state to the continuum in the dots,
(a) (b)
Figure 4. (a) The peak responsivity and detectivity for a 70-layer QDIP measured at 175 K; and (b) the raster-scanned image of a 500 oc heating element from a hot plate (shown schematically in the inset) partially showing two metal strips which was obtained from a (13x 13) QDIP array at 80 K.
