Paper 14092-2
Paper 14092-2
Direct polarization-entangled photon pair generation using domain-engineered nonlinear crystals
13 April 2026 • 12:00 - 12:20 CEST | Churchill (Niveau/Level 1)
Abstract
We present a compact source of biphoton polarization-frequency entanglement realized by shaping the phase-matching function of a periodically poled KTP crystal. The source operates in a simple collinear setup using single-pass spontaneous parametric down-conversion and a dichroic or polarizing beam splitter. This robust and cost-effective configuration enables straightforward implementation outside the laboratory. We characterized the generated state using quantum state tomography across 16 polarization settings and a complementary method based on the symmetry of the joint spectral intensity. The polarization-entangled source exhibits strong nonclassical correlations, confirmed by violation of the Clauser-Horne-Shimony-Holt inequality and high visibility measurements in mutually unbiased bases.
Presenter
Tel Aviv Univ. (Israel)
Inbar Hurvitz is a Ph.D. student in the Department of Electrical Engineering at Tel Aviv University, supervised by Prof. Ady Arie. Her research focuses on the intersection of quantum and nonlinear optics, developing new methods to control and shape quantum light for emerging quantum information technologies. She is dedicated to connecting fundamental science with real-world applications and works on creating versatile tools for manipulating nonclassical light fields. Inbar enjoys collaborating across disciplines to explore how photonics can drive the next generation of quantum devices.