TY - JOUR
T1 - Polarization dependence on downconversion emission angle
T2 - Investigation of the 'Migdall effect'
AU - Rangarajan, Radhika
AU - U'Ren, Alfred B.
AU - Kwiat, Paul G.
N1 - Funding Information:
This work was supported by the National Science Foundation (Grant # EIA-0121568), MURI Center for Photonic Quantum Information Systems (ARO/ARDA Program DAAD19-03-1-0199), and the IARPA-funded Quantum Computing Concept Maturation Optical Quantum Computing Project (Contract No. W911NF-05-0397). AU also acknowledges support from CONACYT, Mexico, by DGAPA, UNAM and by FONCICYT project 94142.
PY - 2011/1/10
Y1 - 2011/1/10
N2 - Photonic sources based on spontaneous parametric downconversion (SPDC) are now pervasively employed in optical quantum information processing protocols. The recent focus on engineering efficient photonic sources requires a thorough understanding of several of the subtler characteristics of SPDC, which had previously been negligible. Here, we experimentally investigate one such phenomenon - the dependence of the downconversion polarization on emission angle. Additionally, we discuss the significance of this effect from the perspective of better engineering SPDC sources. We also propose techniques, specifically in the context of a two-crystal scheme for generating polarization-entangled photons, to exploit the effect and drastically improve source quality in certain limiting cases.
AB - Photonic sources based on spontaneous parametric downconversion (SPDC) are now pervasively employed in optical quantum information processing protocols. The recent focus on engineering efficient photonic sources requires a thorough understanding of several of the subtler characteristics of SPDC, which had previously been negligible. Here, we experimentally investigate one such phenomenon - the dependence of the downconversion polarization on emission angle. Additionally, we discuss the significance of this effect from the perspective of better engineering SPDC sources. We also propose techniques, specifically in the context of a two-crystal scheme for generating polarization-entangled photons, to exploit the effect and drastically improve source quality in certain limiting cases.
KW - downconversion polarization
KW - engineering photon state
KW - two-crystal geometry
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U2 - 10.1080/09500340.2010.515753
DO - 10.1080/09500340.2010.515753
M3 - Article
AN - SCOPUS:79952668342
SN - 0950-0340
VL - 58
SP - 312
EP - 317
JO - Journal of Modern Optics
JF - Journal of Modern Optics
IS - 3-4
ER -