@article{eed6cc76ffd84a328d756306dcc15bd2,
title = "Talbot self-imaging and two-photon interference in ring-core fibers",
abstract = "Wave propagation on the surface of cylinders exhibits interferometric self-imaging, much like the Talbot effect in the near-field diffraction at periodic gratings. We report the experimental observation of the cylindrical Talbot carpet in weakly guiding ring-core fibers for classical light fields. We further show that the ring-core fiber acts as a higher-order optical beamsplitter for single photons, whose output can be controlled by the relative phase between the input light fields. By also demonstrating high-quality two-photon interference between indistinguishable photons sent into the ring-core fiber, our findings open the door to applications in optical telecommunications as a compact beam multiplexer as well as in quantum information processing tasks as a scalable realization of a linear optical network.",
author = "Matias Eriksson and Stickler, {Benjamin A.} and Lea Kopf and Markus Hiekkam{\"a}ki and Regina Gumenyuk and Yuri Chamorovskiy and Sven Ramelow and Robert Fickler",
note = "Funding Information: The authors thank S. Prabhakar, T. Niemi, M. N{\"a}rhi, and S. Bej for fruitful discussions. The authors further thank I. Vorob'ev, V. Aksenov, A. Kolosovskiy, and V. Voloshin for the fiber manufacturing. M.E., L.K., M.H., and R.F. acknowledge the support of the Academy of Finland (Grant No. 308596) and the support of the Academy of Finland through the Competitive Funding to Strengthen University Research Profiles (Decision No. 301820). M.E., L.K., M.H., R.G., and R.F. acknowledge the support from the Flagship of Photonics Research and Innovation (PREIN) funded by the Academy of Finland (Grant No. 320165). L.K. acknowledges support from the Vilho, Yrj{\"o} and Kalle V{\"a}is{\"a}l{\"a} Foundation of the Finnish Academy of Science and Letters. M.H. acknowledges support from the Doctoral School of Tampere University and the Magnus Ehrnrooth foundation through its graduate student scholarship. S.R. acknowledges support from Deutsche Forschungsgemeinschaft (RA 2842/1-1). R.F. acknowledges support from the Academy of Finland through the Academy Research Fellowship (Decision No. 332399). Publisher Copyright: {\textcopyright} 2021 American Physical Society.",
year = "2021",
month = dec,
doi = "10.1103/PhysRevA.104.063512",
language = "English",
volume = "104",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "6",
}