An Experimental Report on Correlated-Photon Ellipsometry

Kimani C. Toussaint, Giovanni Di Giuseppe, Alexander V. Sergienko, Bahaa E.A. Saleh, Malvin C. Teich

Research output: Contribution to journalConference articlepeer-review


Traditional ellipsometric measurements are limited in their accuracy because of the use of an external reference sample for calibration, and because of the noise inherent in the source at low light levels. We demonstrate that these limitations can be circumvented by using a non-classical source of light, namely, twin photons generated by the process of spontaneous parametric downconversion, in conjunction with a novel polarization interferometer and coincidence-counting detection scheme. The twin-photon nature of the source is a unique feature of our scheme. We are guaranteed, on the detection of a photon in one of the arms of the setup, that its twin will be in the other. We present experimental results showing how the technique operates.

Original languageEnglish (US)
Pages (from-to)168-175
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2003
Externally publishedYes
EventPolarization Science and Remote Sensing - San Diego, CA, United States
Duration: Aug 3 2003Aug 5 2003


  • Ellipsometry
  • Nonlinear optics
  • Quantum optics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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