Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 39: Poster: Quantum Optics and Photonics II
Q 39.17: Poster
Dienstag, 6. März 2018, 16:15–18:15, Zelt Ost
double transverse wavevector correlations in photon pairs generated by spdc pumped by bessel-gauss beams — verónica vicuña hernández1, •josé tomás santiago2, yasser jerónimo moreno3, roberto ramírez alarcón4, héctor cruz ramirez1, alfred barry u'ren1, and rocio jáuregui renaud3 — 1Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Apartado Postal 70-543, 04510 Ciudad de México, México — 2Max-Planck-Institute for the Science of Light, Staudtstraße 2, 91058 Erlangen, Germany — 3Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20-364, 01000 Ciudad de México, México — 4Centro de Investigaciones en Optica, Loma del Bosque 115, Colonia Lomas del Campestre, 37150 León Guanajuato, México
In this work we present an experimental study of type I, frequency degenerate spontaneous parametric down conversion (SPDC) pumped by Bessel Gauss beams. Generating these beams either in the paraxial or nonparaxial regime, we studied their effects on the angular spectrum (AS), on the conditional angular spectrum (CAS) of signal-mode single photons as heralded by the detection of an idler photon, and on the transverse wavevector correlations (TWC). Our measurements show that while the pump is made nonparaxial, the AS acquires a non-concentric double-cone structure, and the CAS shape becomes dependent on the azimuthal location of the heralding detector, while the signal-idler wavevector correlation splits into doublet stripes, contrasting with the case of single-stripe when the pump is Gaussian.