A hyperbolic medium will transfer super-resolved optical waveforms with no distortion, support negative refraction, superlensing, and harbor nontrivial topological photonic phases. Evidence of hyperbolic effects is found in periodic and resonant systems for weakly diffracting beams, in metasurfaces, and even naturally in layered systems. At present, an actual hyperbolic propagation requires the use of metamaterials, a solution that is accompanied by constraints on wavelength, geometry, and considerable losses. We show how nonlinearity can transform a bulk KTN perovskite into a broadband 3D hyperbolic substance for visible light, manifesting negative refraction and superlensing at room-temperature. The phenomenon is a consequence of giant electro-optic response to the electric field generated by the thermal diffusion of photogenerated charges. Results open new scenarios in the exploration of enhanced light-matter interaction and in the design of broadband photonic devices.

Hyperbolic optics and superlensing in room-temperature KTN from self-induced k-space topological transitions / Gelkop, Y.; Di Mei, F.; Frishman, S.; Garcia, Y.; Falsi, L.; Perepelitsa, G.; Conti, C.; DelRe, E.; Agranat, A. J.. - In: NATURE COMMUNICATIONS. - ISSN 2041-1723. - 12:1(2021), p. 7241. [10.1038/s41467-021-27466-3]

Hyperbolic optics and superlensing in room-temperature KTN from self-induced k-space topological transitions

Falsi L.;Conti C.;DelRe E.;
2021

Abstract

A hyperbolic medium will transfer super-resolved optical waveforms with no distortion, support negative refraction, superlensing, and harbor nontrivial topological photonic phases. Evidence of hyperbolic effects is found in periodic and resonant systems for weakly diffracting beams, in metasurfaces, and even naturally in layered systems. At present, an actual hyperbolic propagation requires the use of metamaterials, a solution that is accompanied by constraints on wavelength, geometry, and considerable losses. We show how nonlinearity can transform a bulk KTN perovskite into a broadband 3D hyperbolic substance for visible light, manifesting negative refraction and superlensing at room-temperature. The phenomenon is a consequence of giant electro-optic response to the electric field generated by the thermal diffusion of photogenerated charges. Results open new scenarios in the exploration of enhanced light-matter interaction and in the design of broadband photonic devices.
Hyperbolic dispersion; nonlinear optics; superlensing; topological transition
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Hyperbolic optics and superlensing in room-temperature KTN from self-induced k-space topological transitions / Gelkop, Y.; Di Mei, F.; Frishman, S.; Garcia, Y.; Falsi, L.; Perepelitsa, G.; Conti, C.; DelRe, E.; Agranat, A. J.. - In: NATURE COMMUNICATIONS. - ISSN 2041-1723. - 12:1(2021), p. 7241. [10.1038/s41467-021-27466-3]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1599146
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