TY - JOUR
T1 - Hyperbolic optics and superlensing in room-temperature KTN from self-induced k-space topological transitions
AU - Gelkop, Yehonatan
AU - Di Mei, Fabrizio
AU - Frishman, Sagi
AU - Garcia, Yehudit
AU - Falsi, Ludovica
AU - Perepelitsa, Galina
AU - Conti, Claudio
AU - DelRe, Eugenio
AU - Agranat, Aharon J.
N1 - Funding Information: Support from the Sapienza-Ricerca di Ateneo 2019 and 2020 projects (C.C. and E.D.R.), the H2020 Fet project PhoQus (C.C. and E.D.R.), the PRIN 2017 PELM (grant number 20177PSCKT, C.C. and E.D.R.) and PRIN 2020 (grant number 2020X4T57A, E.D.R.) projects, the Israel Science Foundation (Grant No. 1960/16, A.J.A.), and the Israel ministry of Science technology and space (Grant No. 3-16816, A.J.A.) is acknowledged. Publisher Copyright: © 2021, The Author(s).
PY - 2021/12/13
Y1 - 2021/12/13
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85121056631&partnerID=8YFLogxK
U2 - https://doi.org/10.1038/s41467-021-27466-3
DO - https://doi.org/10.1038/s41467-021-27466-3
M3 - Article
C2 - 34903747
SN - 2041-1723
VL - 12
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 7241
ER -