Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.023602
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Funding
- German Ministry of Education and Research (Center for Innovation Competence program) [03Z1HN31]
- European Social Fund (ESF) and National Resources
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We demonstrate that light propagating in an appropriately designed lattice can exhibit dynamics akin to that expected from massless relativistic particles as governed by the one-dimensional Dirac equation. This is accomplished by employing a waveguide array with alternating positive and negative effective coupling coefficients, having a band structure with two intersecting minibands. Through this approach optical analogues of massless particle-antiparticle pairs are experimentally realized. One-dimensional conical diffraction is also observed for the first time in this work.
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