Abstract

No abstract

We report the demonstration of a two-color infrared focal plane array based on a voltage-tunable quantum dots-in-well ͑DWELL͒ design. The active region consists of multiple layers of InAs quantum dots in an In 0.15 Ga 0.85 As quantum well. Spectral response measurements yielded a peak at 5.5 m for lower biases and at 8-10 m for higher biases. Using calibrated blackbody measurements, the midwavelength and long wavelength specific detectivity ͑D * ͒ were estimated to be 7.1ϫ 10 10 cm Hz 1/2 /W͑V b = 1.0 V͒ and 2.6ϫ 10 10 cm Hz 1/2 /W͑V b = 2.6 V͒ at 78 K, respectively. This material was processed into a 320ϫ 256 array and integrated with an Indigo 9705 readout chip and thermal imaging was achieved at 80 K.

No abstract

No abstract