Patent ID: 6906326
Filing Date: 2005-06-14
Classification: B82Y,H01L,Y02E,Y02P

Abstract:
1. A quantum dot infrared photodetector focal plane array (QDIP FPA) for generating infrared images, the device comprising: a first contact layer having a metal contact on its surface; a first barrier layer on the surface of the first contact layer having the metal contact; a first doped quantum dot layer on the first barrier layer, the first doped quantum dot layer configured with a plurality of quantum dots, each dot having a size that is sensitive to a first color; a second barrier layer on the first doped quantum dot layer; a second contact layer on the second barrier layer, the second contact layer having a metal contact on its surface; a third barrier layer on the surface of the second contact layer having the metal contact; a second doped quantum dot layer on the third barrier layer, the second doped quantum dot layer configured with a plurality of quantum dots, each dot having a size that is sensitive to a second color; a fourth barrier layer on the second doped quantum dot layer; a third contact layer on the fourth barrier layer, the third contact layer having a metal contact on its surface; and a read-out circuit that is electrically coupled to each of the metal contacts and adapted to correlate electrical signals produced by the doped quantum dot layers to intensity of sensed light, thereby allowing for the generation of infrared images.