ausblenden:
Schlagwörter:
2-PHOTON ENTANGLEMENT; DOWNCONVERSION; SPECTROSCOPY; PHOTONS; PUMPOptics; Physics; high-speed optical techniques; optical frequency conversion; optical
pumping; optical waveguide filters; quantum entanglement; quantum
optics; two-photon spectra;
Zusammenfassung:
We study the spectral properties of spontaneous parametric down-conversion (SPDC) in a periodically poled waveguided structure of potassium-titanyl-phosphate (KTP) crystal pumped by ultrashort pulses. Our theoretical analysis reveals a strongly entangled and asymmetric structure of the two-photon spectral amplitude for type-II SPDC. We confirm these predictions experimentally by measuring single-photon spectra, on one hand, and the dependence of Hong-Ou-Mandel interference visibility on the width of spectral filtering, on the other hand.
