Parity–time synthetic photonic lattices

By Alois Regensburger, C. Bersch, Mohammad-Ali Miri, G. Onishchukov, Demetrios N. Christodoulides, U. Peschel. Nature, 2012

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Spatial Kramers–Kronig relations and the reflection of waves (2015, background): “The last few years have seen increasing interest in the property of PT–symmetry in optics [13–15], partly because these media can suppress reflection [16, 17].”
Parity–time-symmetric whispering-gallery microcavities (2013, methodology): “PT symmetry has been studied both experimentally [4-12] and theoretically [13-23] in a variety of physical systems, with experiments performed on electronic circuits [4], nuclear magnetic resonance [5], optics [6-8], metamaterials [9], microwave cavities [10], mechanical oscillators [11], and superc”
Nonlinear switching and solitons in PT‐symmetric photonic systems (2015, background): “[198] demonstrated the first experimental realisation of a large-scale PT-symmetric lattice, which was a new kind of optical PT synthetic devices.”
A review on non-Hermitian skin effect (2022, background): “electronic systems with interactions [5], and classical systems with gain or loss [6-20].”