Asymmetric acoustic energy transport in non-Hermitian metamaterials

Autor: Demetrios N. Christodoulides, Ramathasan Thevamaran, Edwin L. Thomas, Eleana Makri, Richard Massey Branscomb, Paul Anzel, Tsampikos Kottos

Publikováno v: The Journal of the Acoustical Society of America. 146:863-872

The ability to control and direct acoustic energy is essential for many engineering applications such as vibration and noise control, invisibility cloaking, acoustic sensing, energy harvesting, and phononic switching and rectification. The realizatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::432e0ebd9e58ec7dd57f69ccb0a2efcf
https://doi.org/10.1121/1.5114919

Microwave limiters implemented by coupled dielectric resonators based on a topological defect mode and CT-symmetry breaking

Autor: Eleana Makri, Ulrich Kuhl, Fabrice Mortessagne, Tsampikos Kottos, Mattis Reisner

Publikováno v: Acta Physica Polonica A
Acta Physica Polonica A, Polish Academy of Sciences. Institute of Physics, 2019, 136 (5), pp.790-796. ⟨10.12693/APhysPolA.136.790⟩

We present a microwave realization of a reflective topological limiter based on an explicit self-induced violation of a charge-conjugation (CT) symmetry. The starting point is a bipartite structure created by coupled dielectric resonators with a topo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f99e1ea8b84acc7440f3a61d3d24e5b

Reflective limiters based on self-induced violation of CT symmetry

Autor: Roney Thomas, Tsampikos Kottos, Eleana Makri

Publikováno v: Physical Review A. 97

Non-Hermitian bipartite photonic lattices with charge-conjugation $(\mathcal{C}\mathcal{T})$ symmetry can support resonant defect modes which are resilient to bipartite losses and structural imperfections. When, however, a (self-)induced violation of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aaeaa4793b41e692185b9292cd96843e
https://doi.org/10.1103/physreva.97.043864

Waveguide Photonic limiters based on topologically protected resonant modes

Autor: Fabrice Mortessagne, Eleana Makri, Tsampikos Kottos, Ilya Vitebskiy, Ulrich Kuhl

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2017, 95, pp.121409(R). ⟨10.1103/PhysRevB.95.121409⟩

We propose a concept of chiral photonic limiters utilising topologically protected localised midgap defect states in a photonic waveguide. The chiral symmetry alleviates the effects of structural imperfections and guaranties a high level of resonant

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7021dd2df804032af769f3c7e2d4ac8a
https://hal.archives-ouvertes.fr/hal-01481364

Design scalable photonic crystals as reflective optical limiters

Autor: Nicholaos I. Limberopoulos, Jarrett H. Vella, Tsampikos Kottos, Ilya Vitebskiy, Eleana Makri, John Goldsmith

Publikováno v: 2016 IEEE Photonics Conference (IPC).

A two photon absorbing defect layer is embedded between two photonic crystals. The defect mode transmits low intensity light and is suppressed by high intensities, resulting in nearly complete reflection. The design is scalable to any wavelength regi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d225bc79f0375b28a1c13d9dc850c1a3
https://doi.org/10.1109/ipcon.2016.7831270