Phase matching in β-barium borate crystals for spontaneous parametric down-conversion

@article{Karan2018PhaseMI,
  title={Phase matching in $\beta$-barium borate crystals for spontaneous parametric down-conversion},
  author={Suman Karan and Shaurya Aarav and Homanga Bharadhwaj and Lavanya Taneja and Arinjoy De and Girish Kulkarni and Nilakantha Meher and Anand K Jha},
  journal={Journal of Optics},
  year={2018},
  volume={22}
}
Spontaneous parametric down-conversion (SPDC) is the most widely used process for generating photon pairs entangled in various degrees of freedom such as polarization, time-energy, position-transverse momentum, and angle-orbital angular momentum (OAM). In SPDC, a pump photon interacts with a non-linear optical crystal and splits into two entangled photons called the signal and the idler photons. The SPDC process has been studied extensively in the last few decades for various pump and crystal… 

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