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- W1982025852 abstract "The interdigitation concept demonstration utilized lc[60 K] ~ 15 mm HgCdTe pixels in a 96 × 96 array format. Each pixel consisted of four interdigitated sub-pixels. Electronic circuitry on the ROIC deselects defective sub-pixels. High detector response is maintained across the pixel, even if one or two interdigitated sub-pixels are deselected, because interdigitation provides that the predominance of minority carriers photogenerated in the pixel is collected by the selected sub-pixels. An interdigitated sub-pixel is deselected where there is a short in at least one of the detectors of the sub-pixel. The configuration of the interdigitated sub-pixels for a pixel is selected such that photogenerated charge carriers generated anywhere within the pixel would be collected by any adjacent, interdigitated sub-pixels within the same pixel that are not deselected because the diffusion length for the charge carriers is long enough. Deselected interdigitated sub-pixels are disconnected so that no charge will be collected on deselected sub-pixels. Therefore, only detectors of adjacent selected interdigitated sub-pixels collect substantially all of the photogenerated charges corresponding to the impinging radiation. Photoresponse modeling of the interdigitated subpixel approach was performed. An example is that for a 20 mm diffusion length, the calculated QE changed from 85 % with 0 sub-pixels deselected, to 78 % with 1 sub-pixel, 67 % with two sub-pixels and 48 % with three sub-pixels deselected. A good comparison has been obtained between modeled and measured performance as a function of sub-pixel deselect." @default.
- W1982025852 created "2016-06-24" @default.
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- W1982025852 date "2008-04-03" @default.
- W1982025852 modified "2023-09-26" @default.
- W1982025852 title "High-operability VLWIR array via interdigitated pixel utilization" @default.
- W1982025852 doi "https://doi.org/10.1117/12.778266" @default.
- W1982025852 hasPublicationYear "2008" @default.
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