GaAs QWIP Array Containing More Than a Million Pixels

A 1,024 × 1,024-pixel array of quantumwell infrared photodetectors (QWIPs) has been built on a 1.8 × 1.8-cm GaAs chip. In tests, the array was found to perform well in detecting images at wavelengths from 8 to 9 μm in operation at temperatures between 60 and 70 K. The largest-format QWIP prior array that performed successfully in tests contained 512 × 640 pixels.