MATTIA UDINA

PhD Graduate

PhD program:: XXXIV



Thesis title: Nonlinear optical response in interacting electron systems

This Thesis work provides a detailed analysis of the nonlinear optical response in different classes of materials where electronic interactions play a central role, ranging from wide-band insulators, to metallic and superconducting compounds. Focusing on recent spectroscopic techniques taking advantage of intense low-frequency (THz) light pulses, such as third-harmonic generation or time-resolved pump-probe measurements, we present a general theoretical framework able to reproduce some of the most striking experimental features. As an example, we provide a comprehensive description for the light-induced coherent generation of different Raman-active modes, such as optical phonons in insulating and metallic systems or electronic collective fluctuations in conventional and unconventional superconductors, and for the THz Kerr effect affecting the nearly instantaneous response in pump-probe experiments. The whole derivation mainly focuses on non-linear optical effects but still relies on a quasi-equilibrium approach, similar to the one used to describe conventional spectroscopic techniques in the weak-field limit, like (spontaneous) Raman scattering. With this respect, we show that time-resolved and Raman experiments provide similar information when high-frequency (eV) light pulses are applied, while THz-driven excitations are in principle subjected to different selection rules, as explicitly demonstrated by the case of disordered superconductors.

Research products

11573/1715579 - 2024 - Terahertz electric-field-driven dynamical multiferroicity in SrTiO3
Basini, M.; Pancaldi, M.; Wehinger, B.; Udina, M.; Unikandanunni, V.; Tadano, T.; Hoffmann, M. C.; Balatsky, A. V.; Bonetti, S. - 01a Articolo in rivista
paper: NATURE (London: Nature Pubihing. Group-Springer Nature Limited -London : Macmillan, 1869- -New York, NY; Nature America Incorporated) pp. 534-539 - issn: 0028-0836 - wos: WOS:001201403000005 (15) - scopus: 2-s2.0-85189957504 (16)

11573/1706086 - 2024 - Terahertz ionic Kerr effect. Two-phonon contribution to the nonlinear optical response in insulators
Basini, M.; Udina, M.; Pancaldi, M.; Unikandanunni, V.; Bonetti, S.; Benfatto, L. - 01a Articolo in rivista
paper: PHYSICAL REVIEW. B (Ridge NY: American Physical Society, [2016-]) pp. 1-10 - issn: 2469-9950 - wos: WOS:001173129900004 (2) - scopus: 2-s2.0-85182899370 (2)

11573/1724781 - 2024 - Investigating Josephson plasmons in layered cuprates via nonlinear terahertz spectroscopy
Fiore, Jacopo; Sellati, Niccolò; Gabriele, Francesco; Castellani, Claudio; Seibold, Goetz; Udina, Mattia; Benfatto, Lara - 01a Articolo in rivista
paper: PHYSICAL REVIEW. B (Ridge NY: American Physical Society, [2016-]) pp. - - issn: 2469-9950 - wos: WOS:001287513900001 (1) - scopus: 2-s2.0-85200798729 (1)

11573/1714464 - 2024 - Revealing novel aspects of light-matter coupling by terahertz two-dimensional coherent spectroscopy. The case of the amplitude mode in superconductors
Katsumi, Kota; Fiore, Jacopo; Udina, Mattia; Romero, Ralph; Barbalas, David; Jesudasan, John; Raychaudhuri, Pratap; Seibold, Goetz; Benfatto, Lara; Armitage, N. P. - 01a Articolo in rivista
paper: PHYSICAL REVIEW LETTERS (American Institute of Physics:2 Huntington Quadrangle, Suite 1NO1:Melville, NY 11747:(800)344-6902, (631)576-2287, EMAIL: subs@aip.org, INTERNET: http://www.aip.org, Fax: (516)349-9704) pp. 1-7 - issn: 0031-9007 - wos: (0) - scopus: (0)

11573/1715327 - 2024 - Tracing the dynamics of superconducting order via transient terahertz third-harmonic generation
Kim, Min-Jae; Kovalev, Sergey; Udina, Mattia; Haenel, Rafael; Kim, Gideok; Puviani, Matteo; Cristiani, Georg; Ilyakov, Igor; De Oliveira, Thales V. A. G.; Ponomaryov, Alexey; Deinert, Jan-Christoph; Logvenov, Gennady; Keimer, Bernhard; Manske, Dirk; Benfatto, Lara; Kaiser, Stefan - 01a Articolo in rivista
paper: SCIENCE ADVANCES (Washington, DC : American Association for the Advancement of Science, 2015-) pp. 1-8 - issn: 2375-2548 - wos: WOS:001190089500017 (6) - scopus: 2-s2.0-85188045668 (6)

11573/1669317 - 2022 - Contribution of collective excitations to third harmonic generation in two-band superconductors: The case of MgB2
Fiore, Jacopo; Udina, Mattia; Marciani, Marco; Seibold, Goetz; Benfatto, Lara - 01a Articolo in rivista
paper: PHYSICAL REVIEW. B (Ridge NY: American Physical Society, [2016-]) pp. - - issn: 2469-9950 - wos: WOS:000945494500006 (7) - scopus: 2-s2.0-85139274267 (9)

11573/1643162 - 2022 - Terahertz displacive excitation of a coherent Raman-active phonon in V2O3
Giorgianni, F.; Udina, M.; Cea, T.; Paris, E.; Caputo, M.; Radovic, M.; Boie, L.; Sakai, J.; Schneider, C. W.; Johnson, S. L. - 01a Articolo in rivista
paper: COMMUNICATIONS PHYSICS ([London]: Springer Nature, 2018-) pp. - - issn: 2399-3650 - wos: WOS:000788607800003 (5) - scopus: 2-s2.0-85129241059 (6)

11573/1643083 - 2022 - THz non-linear optical response in cuprates: predominance of the BCS response over the Higgs mode
Udina, Mattia; Fiore, Jacopo; Cea, Tommaso; Castellani, Claudio; Seibold, Goetz; Benfatto, Lara - 01a Articolo in rivista
paper: FARADAY DISCUSSIONS (Royal Society of Chemistry:Thomas Graham House, Science Park, Cambridge CB4 0WF United Kingdom:011 44 1223 432360, EMAIL: sales@rsc.org, INTERNET: http://www.rsc.org, http://www.chensoc.org, Fax: 011 44 1223 423429) pp. - - issn: 1359-6640 - wos: WOS:000804217300001 (12) - scopus: 2-s2.0-85131966242 (12)

11573/1488335 - 2021 - Non-linear Terahertz driving of plasma waves in layered cuprates
Gabriele, F.; Udina, M.; Benfatto, L. - 01a Articolo in rivista
paper: NATURE COMMUNICATIONS (London: Nature Publishing Group-Springer Nature) pp. - - issn: 2041-1723 - wos: WOS:000617063000022 (25) - scopus: 2-s2.0-85100355085 (26)

11573/1488306 - 2021 - Third harmonic generation from collective modes in disordered superconductors
Seibold, G.; Udina, M.; Castellani, C.; Benfatto, L. - 01a Articolo in rivista
paper: PHYSICAL REVIEW. B (Ridge NY: American Physical Society, [2016-]) pp. - - issn: 2469-9950 - wos: WOS:000609012000005 (37) - scopus: 2-s2.0-85100318786 (38)

11573/1339235 - 2020 - Raman Response in the Nematic Phase of FeSe
Udina, Mattia; Grilli, Marco; Benfatto, Lara; Chubukov, Andrey V. - 01a Articolo in rivista
paper: PHYSICAL REVIEW LETTERS (American Institute of Physics:2 Huntington Quadrangle, Suite 1NO1:Melville, NY 11747:(800)344-6902, (631)576-2287, EMAIL: subs@aip.org, INTERNET: http://www.aip.org, Fax: (516)349-9704) pp. - - issn: 1079-7114 - wos: WOS:000531741700019 (12) - scopus: 2-s2.0-85085661270 (13)

11573/1336279 - 2019 - Theory of coherent-oscillations generation in terahertz pump-probe spectroscopy: from phonons to electronic collective modes
Udina, Mattia; Cea, Tommaso; Benfatto, Lara - 01a Articolo in rivista
paper: PHYSICAL REVIEW. B (Ridge NY: American Physical Society, [2016-]) pp. - - issn: 2469-9950 - wos: WOS:000490750400003 (35) - scopus: 2-s2.0-85074454048 (34)

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