Robust light transport in non-Hermitian photonic lattices

Scientific Reports
Stefano LonghiGiuseppe Della Valle

Abstract

Combating the effects of disorder on light transport in micro- and nano-integrated photonic devices is of major importance from both fundamental and applied viewpoints. In ordinary waveguides, imperfections and disorder cause unwanted back-reflections, which hinder large-scale optical integration. Topological photonic structures, a new class of optical systems inspired by quantum Hall effect and topological insulators, can realize robust transport via topologically-protected unidirectional edge modes. Such waveguides are realized by the introduction of synthetic gauge fields for photons in a two-dimensional structure, which break time reversal symmetry and enable one-way guiding at the edge of the medium. Here we suggest a different route toward robust transport of light in lower-dimensional (1D) photonic lattices, in which time reversal symmetry is broken because of the non-Hermitian nature of transport. While a forward propagating mode in the lattice is amplified, the corresponding backward propagating mode is damped, thus resulting in an asymmetric transport insensitive to disorder or imperfections in the structure. Non-Hermitian asymmetric transport can occur in tight-binding lattices with an imaginary gauge field via a non...Continue Reading

References

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Citations

Jan 18, 2018·Physical Review Letters·Lana DescheemaekerPhilippe Tassin
Mar 30, 2019·Journal of Molecular Modeling·Paulo Eduardo de BritoHugo Nicolas Nazareno
Jul 29, 2020·Nature Communications·Zlata FedorovaJohann Kroha
Oct 16, 2018·Optics Letters·Alessandro AlberucciStefan Nolte
Sep 7, 2019·Physical Review Letters·Xi-Wang Luo, Chuanwei Zhang
Jul 9, 2020·Physical Review Letters·Siddharth BuddhirajuShanhui Fan
Oct 19, 2017·Optics Express·P Duke Anderson, Ganapathi Subramania
Jul 28, 2019·Physical Review Letters·Matthew J ColbrookAnders C Hansen
Sep 11, 2019·Scientific Reports·Stanislav Derevyanko
Sep 16, 2020·Optics Letters·Stefano Longhi
Mar 21, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Ananya Ghatak, Tanmoy Das
Jul 13, 2019·Physical Review Letters·S Longhi
Sep 17, 2019·Physical Review Letters·Ryusuke HamazakiMasahito Ueda
Jan 23, 2021·Physical Review Letters·Haiping Hu, Erhai Zhao
Oct 27, 2020·Light, Science & Applications·Zhifeng ZhangLiang Feng
Apr 10, 2021·Physical Review Letters·Yuan ChenChun-Hua Dong
May 8, 2021·Physical Review Letters·Kohei Kawabata, Shinsei Ryu
Jun 12, 2021·Physical Review Letters·Kohei KawabataShinsei Ryu
Aug 24, 2021·Physical Review Letters·Xiao-Qi SunTaylor L Hughes

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