Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevA.75.043816
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dc.titleJoint spectrum mapping of polarization entanglement in spontaneous parametric down-conversion
dc.contributor.authorPoh, H.S.
dc.contributor.authorLum, C.Y.
dc.contributor.authorMarcikic, I.
dc.contributor.authorLamas-Linares, A.
dc.contributor.authorKurtsiefer, C.
dc.date.accessioned2014-12-12T07:11:54Z
dc.date.available2014-12-12T07:11:54Z
dc.date.issued2007-04-26
dc.identifier.citationPoh, H.S., Lum, C.Y., Marcikic, I., Lamas-Linares, A., Kurtsiefer, C. (2007-04-26). Joint spectrum mapping of polarization entanglement in spontaneous parametric down-conversion. Physical Review A - Atomic, Molecular, and Optical Physics 75 (4) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.75.043816
dc.identifier.issn10502947
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/115163
dc.description.abstractPolarization-entangled photon pairs can be efficiently prepared into pure Bell states with a high fidelity via type-II spontaneous parametric down-conversion (SPDC) of narrow-band pump light. However, the use of femtosecond pump pulses to generate multiphoton states with precise timing often requires spectral filtering to maintain a high quality of polarization entanglement. This typically reduces the efficiency of photon pair collection. We experimentally map the polarization correlations of photon pairs from such a source over a range of down-converted wavelengths with a high spectral resolution and find strong polarization correlations everywhere. A spectrally dependent imbalance between contributions from the two possible decay paths of SPDC is identified as the reason for a reduction in entanglement quality observed with femtosecond pump pulses. Our spectral measurements allow us to predict the polarization correlations for arbitrary filter profiles when the frequency degree of freedom of the photon pairs is ignored. © 2007 The American Physical Society.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1103/PhysRevA.75.043816
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.contributor.departmentTEMASEK LABORATORIES
dc.description.doi10.1103/PhysRevA.75.043816
dc.description.sourcetitlePhysical Review A - Atomic, Molecular, and Optical Physics
dc.description.volume75
dc.description.issue4
dc.description.page-
dc.description.codenPLRAA
dc.identifier.isiut000246074600138
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