Broadband (200-1000 nm) back-illuminated ccd imagers
June 16, 2002
Conference Paper
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Published in:
Scientific Detectors Workshop 2002, 16-22 June 2002.p. 41-50.
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Summary
Improved and stable blue/UV quantum efficiency has been demonstrated on 2Kx4K imagers using molecular-beam epitaxy to create a thin doped layer on the back surface. Quantum efficiency data on thick (40-50 pm) imagers with single and dual-layer anti-reflection coatings is presented that demonstrates high and broadband response. Measurements of the optical point-spread response show the devices to be fully depleted with good response across a broad spectrum, but interesting features appear in the near-IR as a result of deeply penetrating light being scattered off the surface structure of the CCD.