TY  - JOUR
A1  - Heuer, Axel
A1  - Menzel, Ralf
A1  - Milonni, P. W.
T1  - Complementarity in biphoton generation with stimulated or induced coherence
T2  - Physical review : A, Atomic, molecular, and optical physics
N2  - Coherence can be induced or stimulated in parametric down-conversion using two or three crystals when, for example, the idler modes of the crystals are aligned. Previous experiments with induced coherence [Phys. Rev. Lett. 114, 053601 (2015)] focused on which-path information and the role of vacuum fields in realizing complementarity via reduced visibility in single-photon interference. Here we describe experiments comparing induced and stimulated coherence. Different single-photon interference experiments were performed by blocking one of the pump beams in a three-crystal setup. Each counted photon is emitted from one of two crystals and which-way information may or not be available, depending on the setup. Distinctly different results are obtained in the induced and stimulated cases, especially when a variable transmission filter is inserted between the crystals. A simplified theoretical model accounts for all the experimental results and is also used to address the question of whether the phases of the signal and idler fields in parametric down-conversion are correlated.
Y1  - 2015
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/38597
SN  - 1050-2947
SN  - 1094-1622
VL  - 92
IS  - 3
PB  - American Physical Society
CY  - College Park
ER  -