Rostock 2019 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 36: Photonics II
Q 36.2: Talk
Wednesday, March 13, 2019, 14:15–14:30, S Gr. HS Maschb.
Refraction and reflection from an interface between two artificial photonic gauge fields — •Christina Jörg1, Moshe-Ishay Cohen2, Yaakov Lumer2, Yonatan Plotnick2, Mordechai Segev2, and Georg von Freymann1,3 — 1Physics Department and Research Center OPTIMAS, TU Kaiserslautern, Germany — 2Physics Department and Solid State Institute, Technion, Haifa, Israel — 3Fraunhofer Institute for Industrial Mathematics ITWM, Kaiserslautern, Germany
In classical optics, a beam incident on an interface between two optical materials is reflected and refracted, according to the angle of incidence and polarization. With the recent search for topological systems, which necessitate gauge fields, it was shown that refraction and reflection can also occur between two regions of the same material, if each domain has a different gauge field [1,2]. Here, we formulate an analytic model — an alternative Snell’s law — for refraction and reflection from an interface between gauge fields. We experimentally demonstrate it in a photonic structure of two identical 2D-arrays of evanescently coupled waveguides. The arrays are oppositely tilted with respect to the propagation direction. The sample is created by a 3D-micro printer, first printing its inverse by direct laser writing and then infiltrating it with SU8 [3]. We measure the relation between the incident and transmitted wavevectors, validating our formulation.
[1] K. Fang and S. Fan, PRL 111, 203901 (2013).
[2] M. I. Cohen, et al. in CLEO FM3G.4 (OSA, 2017).
[3] C. Jörg, et al., New J. Phys. 19, 083003 (2017).