Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Poster: Quantum Optics and Photonics I
Q 11.41: Poster
Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof
A quantum theory of CCD camera photodetection — •Vanessa Chille1,2,3, Nicolas Treps3, Claude Fabre3, Christoph Marquardt1,2, Gerd Leuchs1,2,4, and Andrea Aiello1 — 1Max Planck Institute for the Science of Light, G\"unther-Scharowsky-Str. 1/Bldg. 24, D-91058 Erlangen, Germany — 2Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg, Staudtstr. 7/B2, D-91058 Erlangen, Germany — 3Laboratoire Kastler Brossel, Sorbonne Universit\'e - UPMC, ENS, Coll\`ege de France, CNRS; 4 place Jussieu, 75252 Paris, France — 4Department of Physics, University of Ottawa, 25 Templeton, Ottawa, Ontario, K1N 6N5 Canada
The measurement of a light beam's spatial shape by means of a CCD camera is a standard procedure in optics. Complex spatial modes receive increasing attention, particularly in the context of quantum optics. Thus, the limits of such kind of measurement imposed by quantum physics are of more and more importance.
We present a quantum theory of multi-pixel photodetection, and we use it to determine the quantum noise affecting the measurements of the width and the position of a light beam. An analytic theory is derived and compared to the theory in [1] that investigates the beam width noise independently of the measurement scheme. Numerical simulations are performed. They give realistic and promising predictions for experimental studies. We also study the influence of detector imperfections.
[1] V. Chille et al. arXiv:1506.08588 (2015).