Regensburg 2007 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 2: Astrophysik II
EP 2.2: Vortrag
Montag, 26. März 2007, 12:00–12:15, H46
Device Simulation and First Measurements of a New Avalanche CCD for Single Optical Photon Imaging — •i. ordavo1,4, r. eckhardt1,4, r. hartmann1,4, p. holl1,4, g. lutz1,4, r. h. richter3,4, h. soltau1,4, l. strüder2,4, and g. vâlceanu2,4 — 1PNSensor GmbH, Römerstraße 28, D-80803 München — 2Max-Planck-Institut für extraterrestrische Physik, Giessenbachstraße, D-85748 Garching — 3Max-Planck-Institut für Physik, Föhringer Ring 6, D-80805, München — 4MPI Halbleiterlabor, Otto-Hahn-Ring 6, D-81739 München, Germany
The concept of a new CCD for single photon detection has been developed at the Max-Planck-Institute Semiconductor Laboratory (HLL) and PNSensor. Besides the established design of back illuminated pnCCDs, relevant optimization toward photon counting is the integration of an avalanche diode whose sensitivity to single electrons has been confirmed by measurements. An on-chip MOSFET provides additional signal amplification and low noise coupling to following readout stages. The overall detection efficiency is expected to be as high as 80% in a wide range of wavelengths. The device can be set to operate in a fast readout mode (above 1000 frames/sec) achieving high time resolution and avoiding signal pileup at the same time. At higher photon rates, increasing the integration time would allow to switch off the avalanche multiplication yielding an image proportional to light intensity. First measurements performed on test structures along with full device simulations are presented. Possible applications include High Time Resolution Astrophysics (HTRA) and wave front sensing for Adaptive Optics.