(This image is taken with bare multiplexer of a   SBRC 256x256 InSb array
whenI was still younger !!!)

Welcome to the homepage of

Gert Finger








My Papers and Reports

 

SPIE Edinburgh 2016 Sub-electron read noise and millisecond full-frame readout with the near infrared eAPD array SAPHIRA paper(pdf)

SPIE Montreal 2014 SAPHIRA detector for infrared wavefront sensing paper(pdf)

ESO WIDE REVIEW Detector development from the early days to E-ELT - Video / power point

NIR HgCdTe Avalanche Photodiode Arrays for Wavefront Sensing and Fringe Tracking, Scientific Detector Workshop 2013, Florence, Italy, 7-11 October 2013,(paper) (power point)

movie taken with SAPHIRA MOVPE heterojunction eAPD array showing signal of 0.38 electons/pixel/DIT (DIT=1.2 ms).

SAPHIRA: a new NIR HgCdTe Avalanche Photodiode Array optimized for Adaptive Optics and Interferometry, Adaptive Optics for Extremely Large Telescopes, 3rd edition, Florence, Italy, 26-31 May 2013, (power point)

Evaluation and optimization of NIR HgCdTe Avalanche Photodiode Arrays for Adaptive Optics and Interferometry, Astronomical Telescopes + Instrumentation, Amsterdam, 1 - 6 July 2012, (pdf)

Infrared Detector Developments for Space Applications, by Harald Weller with ESO input, CMOS Image Sensors for High Performance Applications,Toulouse, France, 6th & 7th December 2011, (pdf)

Infrared Avalanche Photo Diodes for active control loops in AO and interferometry, instrumentation division meeting 15 April 2011, (power point version)

Subelectron readout noise with high speed NIR HgCdTe Avalanche Photodiode Arrays , preliminary and in preparation as presented at the GRAVITY delta PDR,(power point version)

Development of high speed low noise NIR HgCdTe Avalanche Photodiode Arrays for Adaptive Optics and Interferometry,SPIE's International Symposium on Astronomical Telescopes and Instrumentation 2010, SanDiego,(pdf version)

Recent Performance Improvements, Calibration Techniques and Mitigation Strategies for Large-format HgCdTe Arrays
GertGert Finger*, Reinhold J. Dorn, Siegfried Eschbaumer, Derek Ives, Leander Mehrgan, Manfred Meyer and Jörg Stegmeier, Workshop Detectors for Astronmy 2009, ESO Garching, 12-16 October 2009, (ppt-version)

Infrared Detector Systems at ESO
GertGert Finger*, Reinhold J. Dorn, Siegfried Eschbaumer, Derek Ives, Leander Mehrgan, Manfred Meyer and Jörg Stegmeier, Workshop Detectors for Astronmy 2009, ESO Garching, 12-16 October 2009, (pdf-version)

Evolution of IR detection and possible outcomes for astrophysics
Gert Finger , Reinhold J. Dorn, Leander Mehrgan , Manfred Meyer and Jörg Stegmeier, Astrophysics Detector Workshop 2008, Nice 17 - 20 November 2008, EAS Publication Series, to be published,(pdf-version)

Performance evaluation, readout modes and calibration techniques of HgCdTe HAWAII-2RG mosaic arrays
Gert Finger , Reinhold J. Dorn, Siegfried Eschbaumer, Donald N. B. Hall ,Leander Mehrgan , Manfred Meyer and Jörg Stegmeier, Marseille, 23 - 28 June 2008, High Energy, Optical, and Infrared Detectors for Astronomy, SPIE publications, vol. 7021, to be published,(pdf-version)

Interpixel capacitance in large format CMOS hybrid arrays
G. Finger, R.J. Dorn, M. Meyer, L. Mehrgan, A. Moorwood and J. Stegmeier, European Southern Observatory (ESO), Germany; in the proceedings of the "SPIE's International Symposium on Astronomical Telescopes and Instrumentation 2006, Orlando, Florida,; 24 - 31 May 2006, SPIE publications, vol. 6267, High Energy, Optical, and Infrared Detectors for Astronomy II
(pdf-version)

Interpixel capacitance in large format CMOS hybrid arrays
G. Finger, R.J. Dorn, M. Meyer, L. Mehrgan, A. Moorwood and J. Stegmeier, European Southern Observatory (ESO), Germany; in the proceedings of the "SPIE's International Symposium on Astronomical Telescopes and Instrumentation 2006, Orlando, Florida,; 24 - 31 May 2006, SPIE publications, vol. 6267, High Energy, Optical, and Infrared Detectors for Astronomy II
(pdf-version)

Performance evaluation and calibration issus of large format hybrid active pixel sensors used for ground and space based astronomy
G. Finger, R.J. Dorn, L. Mehrgan, M. Meyer, A. Moorwood and J. Stegmeier, European Southern Observatory (ESO), Germany; J. Garnett, Rockwell Scientific, Camarillo, CA, USA; N. Bezawada, UK Astronomy Technology Centre, Edinburgh, UK; G. Woodhouse, CCLRC Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, UK; in Nuclear Instruments and Methods in Physics Research A, 2005
(pdf-version)

Conversion Gain and Interpixel Capacitance of CMOS Hybrid Focal Plane Arrays
Nodal capacitance measurement by a capacitance comparison technique

G. Finger, J.W. Beletic, R.J. Dorn, M. Meyer, L. Mehrgan, A.F.M. Moorwood, J. Stegmeier, European Southern Observatory (ESO), Germany; in "Workshop on Scientific Detectors for Astronomy, Taormina (Sicily/Italy), June 20 - 24, 2005", eds. P. Amico and J.W. Beletic, Springer Verlag, 2005
(pdf-version)

Performance and Evaluation of Large Format 2 k x 2 k MBE Grown MCT HAWAII-2RG Arrays Operating in 32-channel mode
G. Finger, R.J. Dorn, M. Meyer, L. Mehrgan, J. Stegmeier, A. Moorwood, European Southern Observatory (ESO), Germany; in "Workshop on Scientific Detectors for Astronomy, Taormina (Sicily/Italy), June 20 - 24, 2005", eds. P. Amico and J.W. Beletic, Springer Verlag, 2005
(pdf-version)

Performance of large format 2k x 2k MBE grown HgCdTe Hawaii-2RG arrays for low-flux applications
G. Finger, R.J. Dorn, M. Meyer, L. Mehrgan, J. Stegmeier, A.F.M. Moorwood, European Southern Observatory (Germany); in the proceedings of the "SPIE's International Symposium on Astronomical Telescopes and Instrumentation", 2004
(pdf-version)

Performance limitations of small format high-speed infrared arrays for active control loops in interferometry and adaptive optics
G. Finger, European Southern Observatory (Germany); R. Smith, California Institute of Technology (USA); R.J. Dorn, L. Mehrgan, M. Meyer, J. Stegmeier, A.F.M. Moorwood; in the proceedings of the "SPIE's International Symposium on Astronomical Telescopes and Instrumentation", 2004
(pdf-version)

Review of the state of infrared detectors for astronomy in retrospect of the June 2002 Workshop on Scientific Detectors for Astronomy
G. Finger, European Southern Observatory (Germany); J.W. Beletic, W.M. Keck Observatory (USA); in the proceedings of the "SPIE's International Symposium on Astronomical Telescopes and Instrumentation", 2002
(pdf-version)

Test report on HgCdTe Arrays (Hawaii-2 and Picnic MBE/LPE 2.5 and 1.7 micron cut-off)
G. Finger, European Southern Observatory (Germany); ESO Doc. No.: VLT-TRE-ESO-14100-2962, 2002
(pdf-version)

Test results with 2Kx2K MCT arrays
G. Finger, R.J. Dorn, H. Mehrgan, M. Meyer, A. Moorwood, J. Stegmeier; in the proceedings of the "Workshop for Scientific Detectors for Astronomy, Waimea, Hawaii, June 16-22, 2002"; eds. P. Amico and J.W. Beletic; Kluwer Academic Publishers, 2002
(pdf-version) (pdf-poster)

Readout techniques for drift and low frequency noise rejection of infrared arrays
G. Finger, R.J. Dorn, A.W. Hoffman, H. Mehrgan, M. Meyer, A.F. Moorwood, J. Stegmeier; in the proceedings of the "Workshop for Scientific Detectors for Astronomy, Waimea, Hawaii, June 16-22, 2002"; eds. P. Amico and J.W. Beletic; Kluwer Academic Publishers, 2002
(pdf-version of the submitted paper)        (pdf-version of the Powerpoint-presentation)

Performance of large format HgCdTe and InSb arrays for low background applications
G. Finger, H. Mehrgan, M. Meyer, A.F. Moorwood, G. Nicolini, J. Stegmeier; paper presented at the "Workshop for Scientific Detectors for Astronomy", München (Germany), 2000
(pdf-version)        (ps-version)        (html-version)

NIRMOS Detectors and data aquisition system - final design review
G. Finger, M. Meyer; European Southern Observatory (Germany); ESO Doc. No.: VLT-TRE-ESO-14620-2037, 2000
(pdf-version)

ISAAC Test Paranal October 1998
G. Finger, J. Brynnel, H. Gemperlein, J. Knudstrup, J.L. Lizon; European Southern Observatory (Germany); test report, 1998
(pdf-version)        (html-version)

SOFI System Test 1997
G. Finger; European Southern Observatory (Germany); some results of the first SOFI system test, 1997
(pdf-version)        (html-version)


DetectorTests

This is an entry point for published papers on the HAWAII and ALADDIN 1K x1K IR arrays.

ALADDIN 256 x 256 InSb SBRC array

Test of Low Doped SBRC 256 x 256 InSb array with cryogenic operational amplifiers in IRATEC
G. Finger, M. Meyer, G. Nicolini; European Southern Observatory (Germany); new test results
(html-version)

HAWAII 1024 x 1024 HgCdTe Rockwell array

Megapixel Infrared Arrays at the European Southern Observatory
G. Finger, P. Biereichel, J.L. Lizon, M. Meyer, A.F.M. Moorwood, G. Nicolini, A. Silber; European Southern Observatory (Germany); discussion about the ROCKWELL 1k x1k MCT array; Landskrona 1996
(ps-version)
Remarks concerning this paper:
Better noise performance has been achieved as described by the IRACE paper.
The temperature of the dark current measurements may be higher than indicated by the HAWAII paper.

Infrared Detector Development programs for the VLT Instruments at the European Southern Observatory
G. Finger, P. Biereichel, H. Mehrgan, M. Meyer, A.F.M. Moorwood, G. Nicolini, J. Stegmeier; European Southern Observatory (Germany); discussion about SOFI images, read noise < 3 electrons rms, spot scan, persistence, on chip tracking, etc.; Kona 1998
(pdf-version)        (html-version)

Interquadrant row crosstalk
G. Finger, G. Nicolini; European Southern Observatory (Germany); description of the behaviour and removal algorithm for row crosstalk
(pdf-version)        (html-version)

Comparison of Rockwell 1024 x 1024 MCT arrays science grade #2 and science grade #3
G. Finger, G. Nicolini; European Southern Observatory (Germany); description of the Hawaii array with QE > 80 % and dark current < 3 electrons/hour
(pdf-version)        (html-version)

The ESO Infrared Detector high-speed array control and processing electrons IRACE
M. Meyer, G. Finger, H. Mehrgan, J. Stegmeier, A.F.M. Moorwood; European Southern Observatory (Germany); description of the transputer based data acquisition system and most recent performance of HAWAII array; published in the ESO Messenger No. 86, December 1996 (p. 14 - 17)
(pdf-version)

ALADDIN 1024 x 1024 InSb SBRC array

(in preparation)


FITS images: Detector PSF of interpixel capacitve coupling:


Send comments to   Gert Finger (gfinger@eso.org) Jan/25/2007 - Webdesign by   EVI