Author/Authors :
Ting، نويسنده , , David Z.-Y. and Soibel، نويسنده , , Alexander and Khoshakhlagh، نويسنده , , Arezou and Keo، نويسنده , , Sam A. and Nguyen، نويسنده , , Jean and Hِglund، نويسنده , , Linda and Mumolo، نويسنده , , Jason M. and Liu، نويسنده , , John K. and Rafol، نويسنده , , Sir B. and Hill، نويسنده , , Cory J. and Gunapala، نويسنده , , Sarath D.، نويسنده ,
Abstract :
The InAs/GaSb type-II superlattice based complementary barrier infrared detector (CBIRD) has already demonstrated very good performance in long-wavelength infrared (LWIR) detection. In this work, we describe results on a modified CBIRD device that incorporates a double tunnel junction contact designed for robust device and focal plane array processing. The new device also exhibited reduced turn-on voltage. We also report results on the quantum dot barrier infrared detector (QD-BIRD). By incorporating self-assembled InSb quantum dots into the InAsSb absorber of the standard nBn detector structure, the QD-BIRD extend the detector cutoff wavelength from ∼4.2 μm to 6 μm, allowing the coverage of the mid-wavelength infrared (MWIR) transmission window. The device has been observed to show infrared response at 225 K.
Keywords :
Quantum dot , Infrared detector , Type-II superlattice , antimonide , Unipolar barrier
