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Proposed method generates polarization-entangled photon pairs with a single-filter setup, suggesting a novel approach using nonlinear crystals.
We propose a method for creating high-quality polarization-entangled photon pairs by designing the photons’ Joint spectral amplitude (JSA) utilizing a domain-engineered nonlinear crystal and SPDC, with an extremely simple single-filter setup, without requiring post-selection.
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Shukhin et al. (2025) studied this question.
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