Broken Symmetry Dielectric Resonators for High Quality Factor Fano Metasurfaces
Salvatore Campione,Sheng Liu,Lorena I. Basilio,Larry K. Warne,William L. Langston,Ting S. Luk,Joel R. Wendt,John L. Reno,Gordon A. Keeler,Igal Brener,Michael B. Sinclair +10 more
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In this paper, a new approach to dielectric metasurface design relies on a single resonator per unit cell and produces robust, high quality factor Fano resonances.Abstract:
We present a new approach to dielectric metasurface design that relies on a single resonator per unit cell and produces robust, high quality factor Fano resonances. Our approach utilizes symmetry breaking of highly symmetric resonator geometries, such as cubes, to induce couplings between the otherwise orthogonal resonator modes. In particular, we design perturbations that couple “bright” dipole modes to “dark” dipole modes whose radiative decay is suppressed by local field effects in the array. Our approach is widely scalable from the near-infrared to radio frequencies. We first unravel the Fano resonance behavior through numerical simulations of a germanium resonator-based metasurface that achieves a quality factor of ∼1300 at ∼10.8 μm. Then, we present two experimental demonstrations operating in the near-infrared (∼1 μm): a silicon-based implementation that achieves a quality factor of ∼350; and a gallium arsenide-based structure that achieves a quality factor of ∼600, the highest near-infrared qualit...read more
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Asymmetric Metasurfaces with High-Q Resonances Governed by Bound States in the Continuum.
Kirill Koshelev,Kirill Koshelev,Sergey Lepeshov,Mingkai Liu,Andrey Bogdanov,Yuri S. Kivshar,Yuri S. Kivshar +6 more
TL;DR: It is revealed that metasurfaces created by seemingly different lattices of (dielectric or metallic) meta-atoms with broken in-plane symmetry can support sharp high-Q resonances arising from a distortion of symmetry-protected bound states in the continuum.
Journal ArticleDOI
Imaging-based molecular barcoding with pixelated dielectric metasurfaces.
Andreas Tittl,Aleksandrs Leitis,Mingkai Liu,Filiz Yesilkoy,Duk-Yong Choi,Dragomir N. Neshev,Yuri S. Kivshar,Hatice Altug +7 more
TL;DR: An imaging-based nanophotonic technique can resolve absorption fingerprints without the need for spectrometry, frequency scanning, or moving mechanical parts, thereby paving the way toward sensitive and versatile miniaturized mid-infrared spectroscopy devices.
Journal ArticleDOI
Ultrasensitive hyperspectral imaging and biodetection enabled by dielectric metasurfaces
Filiz Yesilkoy,Eduardo R. Arvelo,Yasaman Jahani,Mingkai Liu,Andreas Tittl,Volkan Cevher,Yuri S. Kivshar,Hatice Altug +7 more
TL;DR: In this paper, the authors combine dielectric metasurfaces and hyperspectral imaging to develop an ultrasensitive label-free analytical platform for biosensing, which can acquire spatially resolved spectra from millions of image pixels and use smart data-processing tools to extract high-throughput digital sensing information at the unprecedented level of less than three molecules per μm2.
Journal ArticleDOI
High-Q Quasibound States in the Continuum for Nonlinear Metasurfaces.
TL;DR: The realizations of quasi-BIC under normal excitation with a record Q factor up to 18 511 are presented by engineering the symmetry properties and the number of the unit cells in all-dielectric metasurface platforms.
Journal ArticleDOI
All-dielectric nanophotonics: the quest for better materials and fabrication techniques
Denis G. Baranov,Dmitry Zuev,Sergey Lepeshov,O. V. Kotov,Alex Krasnok,Andrey B. Evlyukhin,Boris N. Chichkov +6 more
TL;DR: In this article, the authors provide an overview of available high-index materials and existing fabrication techniques for the realization of all-dielectric nanostructures and compare performance of the chosen materials in terms of scattering efficiencies and Q factors of the magnetic Mie resonance.
References
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Fano-resonant asymmetric metamaterials for ultrasensitive spectroscopy and identification of molecular monolayers
Chihhui Wu,Alexander B. Khanikaev,Ronen Adato,Nihal Arju,Ahmet Ali Yanik,Hatice Altug,Gennady Shvets +6 more
TL;DR: In this paper, an infrared plasmonic surface based on a Fano-resonant asymmetric metamaterial exhibiting sharp resonances caused by the interference between subradiant and super-radiant resonances was introduced.