Announcing single photons from imperfect sources by means of "interaction-free" measurements

T. Konrad*, A. Scherer, M. Nock, J. Audretsch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Interaction-free measurements can indicate the presence of photo-sensitive objects and even image the objects without damaging them. Can they also be used to indicatethe presence of a single photon without absorbing it? We address this question in the context of improving the efficiency of single-photon sources. In particular, we interpret a recently proposed method to announce single photons based on two-photon absorption [Konrad et al., Phys. Rev. A 73, 032327 (2006)] in terms of "interaction-free" measurements.

Original languageEnglish
Pages (from-to)93-99
Number of pages7
JournalEuropean Physical Journal: Special Topics
Issue number1
Publication statusPublished - Jun 2008
Externally publishedYes


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