Zobrazeno 1 - 10
of 87
pro vyhledávání: '"F. Di Mei"'
Autor:
D. Pierangeli, M. Ferraro, F. Di Mei, G. Di Domenico, C. E. M. de Oliveira, A. J. Agranat, E. DelRe
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-7 (2016)
Crystalline materials are formed by the periodic order of atomic unit cells. Here, Pierangeli et al. report the formation of a ferrelectric super-crystal with micrometric unit cell from modulated nanoscale disorder in potassium-lithium-tantalate-niob
Externí odkaz:
https://doaj.org/article/a542c752fc3f4d76bc5916c4fe5b92e5
Autor:
Davide Pierangeli, Eugenio DelRe, Feifei Xin, Aharon J. Agranat, F. Di Mei, M. Aversa, Ludovica Falsi
Publikováno v:
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
We use giant optical refraction (GR) to perform, for the first time, real-time imaging of ferroelectric volume cluster dynamics [1] . Experiments are carried out in biased KTN:Li kept below its room-temperature Curie point. The analysis of polarizati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a7d3f63bc7366d63d596ff777a33c77
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542663
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542663
Constraint-free wavelength conversion supported by giant refraction in a 3D perovskite Super-Crystal
Autor:
Davide Pierangeli, M. Flammini, Feifei Xin, Jacopo Parravicini, Ludovica Falsi, F. Di Mei, Luca Tartara, Gianbattista Parravicini, Eugenio DelRe, Aharon J. Agranat, P. Di Porto
Publikováno v:
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
We demonstrate second-harmonic generation (SHG) in a KTN:Li ferroelectric perovskite that manifests giant refraction (n ⪢ 1) [1] . When light is focused on the vortex or anti-vortex cores of an underlying ferroelectric super-crystal (SC) [2] , [3]
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41a811602b9354cf123ed8e51a45c118
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9541990
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9541990
Autor:
Aharon J. Agranat, Ludovica Falsi, M. Flammini, P. Di Porto, F. Di Mei, D. Ptet-Anaeli, Eugenio DelRe
Publikováno v:
2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring).
In this work we report broadband refraction and diffraction experiments in a ferroelectric perovskite, a solid-solution K 0.997 Ta 0.64 Nb 0 .36:Li 0.003 (KTN:Li), that demonstrate an index of refraction of $n > 26$ across the entire visible spectrum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::906f7a3ac619cc6e3c7263a08210b0e1
https://doi.org/10.1109/piers-spring46901.2019.9017503
https://doi.org/10.1109/piers-spring46901.2019.9017503
Autor:
F. Di Mei, Aharon J. Agranat, Ludovica Falsi, M. Flammini, P. Di Porto, Eugenio DelRe, Davide Pierangeli
Publikováno v:
Nature photonics (Online) (2018). doi:10.1038/s41566-018-0276-3
info:cnr-pdr/source/autori:Di Mei F.; Falsi L.; Flammini M.; Pierangeli D.; Di Porto P.; Agranat A.J.; DelRe E./titolo:Giant broadband refraction in the visible in a ferroelectric perovskite/doi:10.1038%2Fs41566-018-0276-3/rivista:Nature photonics (Online)/anno:2018/pagina_da:/pagina_a:/intervallo_pagine:/volume
info:cnr-pdr/source/autori:Di Mei F.; Falsi L.; Flammini M.; Pierangeli D.; Di Porto P.; Agranat A.J.; DelRe E./titolo:Giant broadband refraction in the visible in a ferroelectric perovskite/doi:10.1038%2Fs41566-018-0276-3/rivista:Nature photonics (Online)/anno:2018/pagina_da:/pagina_a:/intervallo_pagine:/volume
In principle, materials with a broadband giant index of refraction (n > 10) overcome chromatic aberration and shrink the diffraction limit down to the nanoscale, allowing new opportunities for nanoscopic imaging1. They also open alternative avenues f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fbc16b976aa5a986fe39e6deb0033e35
http://hdl.handle.net/11573/1277571
http://hdl.handle.net/11573/1277571
Autor:
M Jlammini, Lei Zhang, Davide Pierangeli, Andrea Tavani, Aharon J. Agranat, Eugenio DelRe, Claudio Conti, F. Di Mei
Publikováno v:
CLEO: QELS_Fundamental Science 2018, San Jose, California United States, 13-18 May 2018
info:cnr-pdr/source/autori:D. Pierangeli, M.Flammini, A. Tavani, F. Di Mei, A.J. Agranat, L. Zhang, C. Conti, E. DelRe/congresso_nome:CLEO: QELS_Fundamental Science 2018/congresso_luogo:San Jose, California United States/congresso_data:13-18 May 2018/anno:2018/pagina_da:/pagina_a:/intervallo_pagine
info:cnr-pdr/source/autori:D. Pierangeli, M.Flammini, A. Tavani, F. Di Mei, A.J. Agranat, L. Zhang, C. Conti, E. DelRe/congresso_nome:CLEO: QELS_Fundamental Science 2018/congresso_luogo:San Jose, California United States/congresso_data:13-18 May 2018/anno:2018/pagina_da:/pagina_a:/intervallo_pagine
We report the observation of replica symmetry breaking in optical wave propagation, a phenomenon that emerges from the interplay of disorder and nonlinearity and demonstrates a spin-glass phase for light.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f1947fcfea27ba84384d2256660e2f8
https://publications.cnr.it/doc/387258
https://publications.cnr.it/doc/387258
Autor:
Aharon J. Agranat, M. Flammini, Ludovica Falsi, Eugenio DelRe, M. Ferraro, G. Di Domenico, F. Di Mei, Davide Pierangeli
Publikováno v:
Optics letters (Online) 42 (2017): 3856–3859. doi:10.1364/OL.42.003856
info:cnr-pdr/source/autori:Ferraro M.; Pierangeli D.; Flammini M.; Di Domenico G.; Falsi L.; Di Mei F.; Agranat A.J.; DelRe E./titolo:Observation of polarization-maintaining light propagation in depoled compositionally disordered ferroelectrics/doi:10.1364%2FOL.42.003856/rivista:Optics letters (Online)/anno:2017/pagina_da:3856/pagina_a:3859/intervallo_pagine:3856–3859/volume:42
info:cnr-pdr/source/autori:Ferraro M.; Pierangeli D.; Flammini M.; Di Domenico G.; Falsi L.; Di Mei F.; Agranat A.J.; DelRe E./titolo:Observation of polarization-maintaining light propagation in depoled compositionally disordered ferroelectrics/doi:10.1364%2FOL.42.003856/rivista:Optics letters (Online)/anno:2017/pagina_da:3856/pagina_a:3859/intervallo_pagine:3856–3859/volume:42
We investigate the evolution of the state of polarization of light propagating through bulk depoled composite ferroelectrics below the Curie temperature. In contrast to standard depoled ferroelectrics, where random birefringence causes depolarization
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e1669b6b6943895440de76fc9dcaed4a
https://publications.cnr.it/doc/382355
https://publications.cnr.it/doc/382355
Autor:
Eugenio DelRe, F. Di Mei, G. Musarra, Davide Pierangeli, G. Di Domenico, Claudio Conti, Aharon J. Agranat
Publikováno v:
Physical review. A (Online) 94 (2016): 063833-1–063833-5. doi:10.1103/PhysRevA.94.063833
info:cnr-pdr/source/autori:Pierangeli D.; Musarra G.; Di Mei F.; Di Domenico G.; Agranat A.J.; Conti C.; Delre E./titolo:Enhancing optical extreme events through input wave disorder/doi:10.1103%2FPhysRevA.94.063833/rivista:Physical review. A (Online)/anno:2016/pagina_da:063833-1/pagina_a:063833-5/intervallo_pagine:063833-1–063833-5/volume:94
info:cnr-pdr/source/autori:Pierangeli D.; Musarra G.; Di Mei F.; Di Domenico G.; Agranat A.J.; Conti C.; Delre E./titolo:Enhancing optical extreme events through input wave disorder/doi:10.1103%2FPhysRevA.94.063833/rivista:Physical review. A (Online)/anno:2016/pagina_da:063833-1/pagina_a:063833-5/intervallo_pagine:063833-1–063833-5/volume:94
We demonstrate how the emergence of extreme events strongly depends on the correlation length of the input field distribution. Observing the behavior of optical waves in turbulent photorefractive propagation with partially incoherent excitations, we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e6a7f9f85e998b95657a8ac527ec047c
https://publications.cnr.it/doc/372158
https://publications.cnr.it/doc/372158
Autor:
Eugenio DelRe, M. Ferraro, C.E.M. de Oliveira, Davide Pierangeli, G. Di Domenico, Aharon J. Agranat, F. Di Mei
Publikováno v:
Conference on Lasers and Electro-Optics.
We report the spontaneous formation of a volume cubic grating in ferroelectric KLTN. Diffraction indicates a 3D linear, electro-optic, and nonlinear structure with lattice constant 10000 times larger than the underlying perovskite lattice.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c82528da0042455d5bacb4a7f50c9d2
https://doi.org/10.1364/cleo_qels.2016.fm1a.4
https://doi.org/10.1364/cleo_qels.2016.fm1a.4
Publikováno v:
info:cnr-pdr/source/autori:Pierangeli D. (1); Di Mei F. (1); Conti C. (2); Agranat A.J. (3); Del Re E. (1)/congresso_nome:101° Congresso Nazionale della Società Italiana di Fisica/congresso_luogo:Roma/congresso_data:21-25%2F09%2F2015/anno:2015/pagina_da:atticon9142 II-C-44/pagina_a:/intervallo_pagine:atticon9142 II-C-44
Physical review letters
115 (2015): 093901-1–093901-6. doi:10.1103/PhysRevLett.115.093901
info:cnr-pdr/source/autori:D. Pierangeli; F. Di Mei; C. Conti; A.J. Agranat; E. DelRe/titolo:Spatial Rogue Waves in Photorefractive Ferroelectrics/doi:10.1103%2FPhysRevLett.115.093901/rivista:Physical review letters (Print)/anno:2015/pagina_da:093901-1/pagina_a:093901-6/intervallo_pagine:093901-1–093901-6/volume:115
Physical review letters
115 (2015): 093901-1–093901-6. doi:10.1103/PhysRevLett.115.093901
info:cnr-pdr/source/autori:D. Pierangeli; F. Di Mei; C. Conti; A.J. Agranat; E. DelRe/titolo:Spatial Rogue Waves in Photorefractive Ferroelectrics/doi:10.1103%2FPhysRevLett.115.093901/rivista:Physical review letters (Print)/anno:2015/pagina_da:093901-1/pagina_a:093901-6/intervallo_pagine:093901-1–093901-6/volume:115
Rogue waves are observed as light propagates in the extreme nonlinear regime that occurs when a photorefractive ferroelectric crystal is undergoing a structural phase transition. The transmitted spatial light distribution contains bright localized sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4179192b87e38e32838855bdc857610b
https://doi.org/10.1103/physrevlett.115.093901
https://doi.org/10.1103/physrevlett.115.093901