Naslov
Reciprocal skin effect and its realization in a topolectrical circuit

Autori
Hofmann, Tobias ; Helbig, Tobias ; Schindler, Frank ; Salgo, Nora ; Brzezińska, Marta ; Greiter, Martin ; Kiessling, Tobias ; Wolf, David ; Vollhardt, Achim ; Kabaši, Anton ; Lee, Ching Hua ; Bilušić, Ante ; Thomale, Ronny ; Neupert, Titus

Izvornik
Physical review research (2643-1564) 2 (2020), 2; 023265, 11

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
non-Hermiticity ; topological states

Sažetak
A system is non-Hermitian when it exchanges energy with its environment and nonreciprocal when it behaves differently upon the interchange of input and response. Within the field of metamaterial research on synthetic topological matter, the skin effect describes the conspiracy of non-Hermiticity and nonreciprocity to yield extensive anomalous localization of all eigenmodes in a (quasi) one-dimensional geometry. Here, we introduce the reciprocal skin effect, which occurs in non-Hermitian but reciprocal systems in two or more dimensions: Eigenmodes with opposite longitudinal momentum exhibit opposite transverse anomalous localization. We experimentally demonstrate the reciprocal skin effect in a passive RLC circuit, suggesting convenient alternative implementations in optical, acoustic, mechanical, and related platforms. Skin mode localization brings forth potential applications in directional and polarization detectors for electromagnetic waves.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA