| 摘要 |
PROBLEM TO BE SOLVED: To provide a quantum well infrared radiation absorbing photoconductor having good efficiency with respect to an incident infrared radiation. SOLUTION: This infrared detector array 150 has a plurality of detector pixel structures 154 to 164, and each of the structures has a plurality of quantum well infrared radiation absorbing photoconductor (QWIP) elements, which are long extended. Groups consisting of the QWIP elements are provided at intervals and are formed into diffration gratings with respect to the infrared radiations received. Vertical contacts 186 are respectively provided on the surfaces, which face opposite the long extended elements of the QWIPs and under the bottoms, which face opposite the long extended elements of the QWIPs, a current is made to flow through the elements in such a way as to cross the axes of the elements and a necessary bias voltage is applied to the elements. An optical cavity improved covering can be applied on the surfaces of the elements. Images corresponding to the received infrared radiations are generated by a grouped signal from the detector pixel structures.
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