Hong-Ou-Mandel interference of entangled Hermite-Gauss modes

@article{Zhang2016HongOuMandelIO,
  title={Hong-Ou-Mandel interference of entangled Hermite-Gauss modes},
  author={Yingwen Zhang and F. Stef Roux and Ebrahim Karimi and Andrew Forbes},
  journal={Physical Review A},
  year={2016},
  volume={94},
  pages={033855}
}
Hong-Ou-Mandel (HOM) interference is demonstrated experimentally for entangled photon pairs in the Hermite-Gauss (HG) basis. We use two Dove prisms in one of the paths of the photons to manipulate the entangled quantum state that enters the HOM interferometer. It is demonstrated that, when entangled photon pairs are in a symmetric Bell state in the Laguerre-Gauss (LG) basis, they will remain symmetric after decomposing them into the HG basis, thereby resulting in no coincidence events after the… 
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