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  4. Generalized laws of refraction and reflection at interfaces between different photonic artificial gauge fields
 
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2020
Journal Article
Title

Generalized laws of refraction and reflection at interfaces between different photonic artificial gauge fields

Abstract
Artificial gauge fields the control over the dynamics of uncharged particles by engineering the potential landscape such that the particles behave as if effective external fields are acting on them. Recent years have witnessed a growing interest in artificial gauge fields generated either by the geometry or by time-dependent modulation, as they have been enablers of topological phenomena and synthetic dimensions in many physical settings, e.g., photonics, cold atoms, and acoustic waves. Here, we formulate and experimentally demonstrate the generalized laws of refraction and reflection at an interface between two regions with different artificial gauge fields. We use the symmetries in the system to obtain the generalized Snell law for such a gauge interface and solve for reflection and transmission. We identify total internal reflection (TIR) and complete transmission and demonstrate the concept in experiments. In addition, we calculate the artificial magnetic flux at the interface of two regions with different artificial gauge fields and present a method to concatenate several gauge interfaces. As an example, we propose a scheme to make a gauge imaging system a device that can reconstruct (image) the shape of an arbitrary wavepacket launched from a certain position to a predesigned location.
Author(s)
Cohen, Moshe-Ishay
Physics Department, TechnionIsrael Institute of Technology, Haifa, 32000, Israel;Solid State Institute, TechnionIsrael Institute of Technology, Haifa, 32000, Israel
Jörg, Christina
Physics Department and Research Center OPTIMAS, TU Kaiserslautern, 67663, Kaiserslautern, Germany; Department of Physics, The Pennsylvania State University, State College, PA, 16802, USA
Lumer, Yaakov
Physics Department, TechnionIsrael Institute of Technology, Haifa, 32000, Israel; Solid State Institute, TechnionIsrael Institute of Technology, Haifa, 32000, Israel
Plotnik, Yonatan
Physics Department, TechnionIsrael Institute of Technology, Haifa, 32000, Israel; Solid State Institute, TechnionIsrael Institute of Technology, Haifa, 32000, Israel
Waller, Erik H.
Physics Department and Research Center OPTIMAS, TU Kaiserslautern, 67663, Kaiserslautern, Germany
Schulz, Julian
Physics Department and Research Center OPTIMAS, TU Kaiserslautern, 67663, Kaiserslautern, Germany
Freymann, Georg von  
Fraunhofer-Institut für Techno- und Wirtschaftsmathematik ITWM  
Segev, Mordechai
Physics Department, TechnionIsrael Institute of Technology, Haifa, 32000, Israel; Solid State Institute, TechnionIsrael Institute of Technology, Haifa, 32000, Israel
Journal
Light. Online resource  
Funder
Deutsche Forschungsgemeinschaft DFG  
Open Access
DOI
10.1038/s41377-020-00411-7
Additional full text version
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Language
English
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