Highly sensitive low-noise vacuum photodetectors and prospects of their application in studies of ultra-weak luminescence of biological objects and (bio-)chemical systems
Oleg E.Tereshchenko1, Heinrich E. Scheibler1, Kirill V. Merkulin1, Vasily V. Bakin1, Stanislav A. Rozhkov1, Vadim S. Rusetsky1,2, Vladimir A. Golyashov1, Danil A. Kustov1, Elena V. Naumova1, Alexander Y. Demin2; 1A.V. Rzhanov Institute of Semiconductor Physics SB RAS, Novosibirsk, 2CJSC EKRAN-FEP, Novosibirsk, Russia
Abstract
The progress in the research of ultraweak luminescence of biological objects was always determined by the progress in highly-sensitive and low-noise detectors. Study of ultraweak luminescence (i.e. <105 quanta cm-2 s-1) especially with spatial resolution pose challenging requirements for technical characteristics, which are not fully met by commercially available lines of standard detectors.
Our technological infrastructure developed on the basis of R&D facilities for standard gallium arsenide and multi-alkali image-intensifiers and photomultipliers provides significant flexibility in development and fabrication of custom-made vacuum photodetectors for spectral ranges from deep UV to IR range. We develop highly efficient photodetectors with AlxGa1-xN (200-360 nm), Cs2Te (200-290 nm), CsI (110-200 nm) and Na2KSbCs (300-900 nm) photocathodes with quantum efficiency in the range of 30-50% and up to 70 lp/mm spatial resolution. Photodetectors for the X-ray range based on the CsI photocathode and for the IR-THz range based on a pyroelectric target combined with an image-intensifiers are under development.
Technical characteristics of a range of developed devices are presented with an accent on the image intensifiers for 2D imaging suitable for operation in the single-photon counting mode. Prospects of their application for the study of ultraweak luminescence of biological objects and (bio-) chemical systems are discussed.
Speaker
Oleg E. Tereshchenko
A.V. Rzhanov Institute of Semiconductor Physics SB RAS
Russia
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