000268013 001__ 268013
000268013 005__ 20190710061315.0
000268013 037__ $$aPOST_TALK
000268013 245__ $$aAcoustic Topological Fano Resonances
000268013 260__ $$c2019-06-17
000268013 269__ $$a2019-06-17
000268013 336__ $$aTalks
000268013 513__ $$aTalks
000268013 520__ $$aOriginally discovered in the context of quantum mechanics in 1961, the ultra-sharp spectrum of the Fano resonance has nowadays established itself as centerpiece in modern engineering for realizing a large variety of prominent devices including low energy switches [1], efficient sources and emitters [2], and highly sensitive interferometers [3]. In addition, the peculiar asymmetric line shape of the Fano resonance is found to be substantially sensitive to environmental changes, establishing a unique platform for the implementation of highly sensitive sensors and actuators [4]. The excessive sensitivity of the Fano resonance to environmental and structural parameters is, however, not always desirable as it makes the practical implementation of Fano structures extremely challenging, mitigating the performance advantages obtained from Fano interference by costs related to the fabrication technology. Here, we report our recent theoretical findings and experimental observations of acoustic topological Fano resonances whose much-sought line-shapes is guaranteed by topology, offering a unique protection against geometrical tolerances. We construct such topological Fano resonances from interaction between a bright and a dark mode that both have topological origin, and demonstrate this concept experimentally for audible airborne sound in a one-dimensional acoustic scenario. By going beyond the performance degradation caused by inadvertent fabrication flaws, such protection paves the way for a new generation of Fano-based acoustic devices which, not only possess exotic properties as any other Fano structure, but also can be readily implemented in practice with very low cost [5]. 1. K. Nozaki, et al. Optics express 21.10 (2013): 11877-11888. 2. S. Chua, et al. Optics express 19.2 (2011): 1539-1562. 3. K. Heeg, et al. Physical review letters 114.20 (2015): 207401. 4. C. Wu, et al. Nature materials 11.1 (2012): 69. 5. F. Zangeneh-Nejad, and R. Fleury, Physical review letters. 122 (2019): 014301
000268013 6531_ $$aFano resonance
000268013 6531_ $$aTopology
000268013 6531_ $$aSensing
000268013 700__ $$0251193$$aZangeneh Nejad, Farzad$$g277230
000268013 700__ $$0249696$$aFleury, Romain$$g201483
000268013 7112_ $$aPhotonics and Electromagnetics Research Symposium$$cRome, Italy$$dJune 17-20, 2019
000268013 8560_ $$fromain.fleury@epfl.ch
000268013 909C0 $$zMarselli, Béatrice$$xU13119$$pLWE$$mromain.fleury@epfl.ch$$0252597
000268013 909CO $$ooai:infoscience.epfl.ch:268013$$ppresentation$$pSTI
000268013 960__ $$aromain.fleury@epfl.ch
000268013 961__ $$apierre.devaud@epfl.ch
000268013 973__ $$aEPFL$$sPUBLISHED
000268013 980__ $$aPOST_TALK
000268013 981__ $$aoverwrite