Prof. Nicolò Maccaferri Profile

Prof. Nicolò Maccaferri

at Umeå Univ

SPIE Involvement:

Editorial Board Member: Advanced Photonics Nexus | Author

Publications (13)

Proceedings Article | 9 June 2023 Presentation + Paper

Ultrafast control of exciton dynamics by optically-induced thermionic carrier injection in a metal-semiconductor heterojunction

Kilian Keller, Ricardo Rojas-Aedo, Huiqin Zhang, Pirmin Schweizer, Jonas Allerbeck, Daniele Brida, Deep Jariwala, Nicolò Maccaferri

Proceedings Volume 12584, 1258403 (2023) https://doi.org/10.1117/12.2665677

KEYWORDS: Excitons, Ultrafast phenomena, Gold, Semiconductors, Interfaces, Electrons, Heterojunctions, Optoelectronics, Absorption, Carrier dynamics, Optoelectronic devices

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Proceedings Article | 8 June 2023 Presentation

Ultrafast nanophotonics: from all-optical switching based on metamaterial cavity electrodynamics to plasmon-driven polaritonic chemistry

Nicolò Maccaferri

Proceedings Volume PC12569, (2023) https://doi.org/10.1117/12.2665664

KEYWORDS: Polaritons, Ultrafast phenomena, Resonators, Quantum optics, Plasmonics, Photons, Nanoantennas, Molecules, Modeling

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Ultrafast control of light-matter interactions is fundamental in view of new technological frontiers, for instance in light-driven information processing and nanoscale photochemistry. In this framework, we explore metal-dielectric nanocavities to achieve all-optical modulation of the light reflectance at a specific wavelength. Without the need of driving higher order effects, our system is based on linear absorption, provides large relative modulation exceeding 100% and switching bandwidths of few hundred GHz at moderate excitation fluence. This archetypical system becomes even more interesting if the “gain medium” is an inorganic van der Waals bonded semiconductor, like a transition metal dichalcogenide (TMD). TMDs are subject of intense research due to their electronic and optical properties which are promising for next-generation optoelectronic devices. In this context, understanding the ultrafast carrier dynamics, as well as charge and energy transfer at the interface between metals and semiconductors is crucial and yet quite unexplored. By employing a pump-push-probe scheme, we experimentally study how thermally induced ultrafast charge carrier injection affects the exciton formation dynamics in bulk WS2, opening up excellent opportunities also in nano-chemistry. In fact, if an electronic transition strongly interacts with the light modes of a resonator, we can tailor the energetics and the morphology of a molecular state. By combining quantum mechanical modelling and pump-probe spectroscopy, we shed light on the ultrafast dynamics of a hybrid system composed of photo-switchable dye molecules coupled with optically anisotropic plasmonic nanoantennas, which allow us to selectively switch between two regimes where the light-matter interaction is either weak or strong. Our synergistic approach is instrumental to devise new strategies for tailoring electronic states by using plasmons for applications in polaritonic chemistry on femtosecond timescales.

Proceedings Article | 5 June 2023 Presentation + Paper

Non-degenerate magneto-optical pump-probe spectroscopy of thermal and nonthermal spin dynamics in magnetic and magnetoplasmonic materials with sub-15 fs time resolution

Tlek Tapani, Haifeng Lin, Nils Henriksson, Nicolò Maccaferri

Proceedings Volume 12569, 1256905 (2023) https://doi.org/10.1117/12.2665673

KEYWORDS: Ultrafast phenomena, Magnetism, Nickel, Plasmonics, Spin dynamics, Magneto-optics, Spectroscopy, Femtosecond phenomena, Electrons, Magnetooptics

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Proceedings Article | 24 May 2022 Paper

Control of particle trapping in solid-state nanopores with magnetic functionalities: an overview

Alemayehu Nana Koya, Joel Kuttruff, Tilaike Tapani, Alba Viejo Rodríguez, Sreyash Sarkar, Ornella Vaccarelli, Nicolò Maccaferri

Proceedings Volume 12131, 1213111 (2022) https://doi.org/10.1117/12.2622218

KEYWORDS: Magnetism, Plasmonics, Molecules, Nanoparticles, Solid state electronics, Optical tweezers, Sensors, Proteins, Lithium, Solid state physics

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Proceedings Article | 1 August 2021 Presentation

Magneto-optics in hyperbolic nanomaterials

Joel Kuttruff, Alessio Gabbani, Gaia Petrucci, Yingqi Zhao, Marzia Iarossi, Esteban Pedrueza Villalmanzo, Antonietta Parracino, Giuseppe Strangi, Alexandre Dmitriev, Francesco De Angelis, Daniele Brida, Francesco Pineider, Nicolò Maccaferri

Proceedings Volume 11805, 1180522 (2021) https://doi.org/10.1117/12.2595139

KEYWORDS: Magneto-optics, Magnetism, Nanomaterials, Nanoantennas, Dichroic materials, Visible radiation, Systems modeling, Spherical lenses, Particles, Numerical simulations

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Proceedings Article | 18 April 2021 Presentation

Broadband tuning of the magneto-optical response of hybrid metal-insulator nanoparticles enabled by hyperbolic electric and magnetic modes

Joel Kuttruff, Alessio Gabbani, Gaia Petrucci, Yingqi Zhao, Marzia Iarossi, Esteban Pedrueza Villalmanzo, Antonietta Parracino, Giuseppe Strangi, Alexandre Dmitriev, Daniele Brida, Francesco De Angelis, Francesco Pineider, Nicolò Maccaferri

Proceedings Volume 11769, 117690H (2021) https://doi.org/10.1117/12.2589837

KEYWORDS: Magnetism, Nanoparticles, Magneto-optics, Circular dichroism spectroscopy, Optical properties, Metals, Visible radiation, Systems modeling, Surface plasmons, Spherical lenses

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In the framework of magneto-photonics, the optical properties of a material can controlled by an external magnetic field, providing active functionalities for applications, such as sensing and nonreciprocal optical isolation. For noble metals in particular, the inherently weak magnetooptical coupling of the bulk material can be greatly enhanced via excitation of localized surface plasmons (LSP) in nanostructured samples. Hyperbolic metamaterials therein provide the ideal platform to tune the plasmonic properties via careful design of the effective permittivity tensor. Here, we report on the magnetic circular dichroism of electric and magnetic dipole modes of a type II hyperbolic metasurface. Disk-shaped nanoparticles consist in stacks of alternating dielectric and metallic layers. Using an effective medium theory, we show that the optical properties of the system can be perfectly described by an anisotropic homogenized permittivity. Magnetic circular dichroism spectroscopy experiments are compared with plain gold disk samples and reveal a broadband magneto-optical response across the visible and near infrared spectral range. In particular, derivative-like spectral signatures at the resonances of the nanoparticles prove the induced dichroism for the two modes of the system. Results are interpreted in terms of magnetically induced spatial confinement/broadening of circular currents in the nanoparticles and are compared with a comprehensive numerical model based on the finite elements method using the real dimensions of the nanostructure. Spherical particles are employed as an analytical model system, allowing to generalize the contribution of electric and magnetic modes to the total magneto-optical response. More in detail, interaction cross sections are calculated as a weighted sum of the corresponding Mie coefficients. Utilizing a perturbative approach, we describe the magneto-optical effect in terms of linear changes in the cyclotron frequency of free charge carriers in the metal. By comparing our analytical model with full-wave numerical results, we can identify the contribution of electric and magnetic dipole modes to the spectrum and reproduce the spectral line shape we observe in the experiments for the hyperbolic nanoparticles.

Proceedings Article | 18 April 2021 Presentation + Paper

Enhanced second-harmonic generation by single metal–insulator multilayered nanocavities with axial symmetry resonating in the near-infrared

Attilio Zilli, Tommi Isoniemi, Marzia Iarossi, Marco Finazzi, Francesco De Angelis, Michele Celebrano, Nicolò Maccaferri

Proceedings Volume 11770, 117700Y (2021) https://doi.org/10.1117/12.2589836

KEYWORDS: Nonlinear optics, Nanostructures, Complex systems, Visible radiation, Second-harmonic generation, Optoelectronics, Nonlinear crystals, Gold, Composites, Absorption

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Proceedings Article | 18 April 2021 Poster + Paper

Ultrafast opto-acoustic modulation of light reflectance in metal-insulator-metal epsilon-near-zero nanocavities

Joel Kuttruff, Roman Krahne, Antonio De Luca, Vincenzo Caligiuri, Nicolò Maccaferri

Proceedings Volume 11769, 117691A (2021) https://doi.org/10.1117/12.2589834

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Proceedings Article | 7 March 2019 Presentation + Paper

Plasmonic nanopore prepared on MoS2 membrane-hybrid nanostructures based on site selective deposition

Dario Mosconi, Ermanno Miele, Giorgia Giovannini, Andrea Jacassi, Nicolò Maccaferri, Denis Garoli

Proceedings Volume 10894, 1089417 (2019) https://doi.org/10.1117/12.2515298

KEYWORDS: Molybdenum, Plasmonics, Nanostructures, Nanolithography, Silicon, Raman spectroscopy, Metals, Ions, Optical properties, Gold

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Proceedings Article | 7 March 2019 Paper

FRET characterization of hollow plasmonic nanoantennas

Nicolò Maccaferri, Paolo Ponzellini, Giorgia Giovannini, Xavier Zambrana-Puyalto

Proceedings Volume 10894, 108941L (2019) https://doi.org/10.1117/12.2515296

KEYWORDS: Fluorescence resonance energy transfer, Plasmonics, Luminescence, Molecules, Nanoantennas, Antennas, Nanolithography, Fluorescence spectroscopy, Microscopes, Confocal microscopy

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Proceedings Article | 7 March 2019 Presentation + Paper

Fabrication and optical characterization of hyperbolic nanoparticles on a transparent substrate

Marzia Iarossi, Daniel Darvill, Tommi Isoniemi, Antonietta Parracino, Yingqi Zhao, Nicolò Maccaferri

Proceedings Volume 10927, 1092713 (2019) https://doi.org/10.1117/12.2515303

KEYWORDS: Photonics, Metamaterials, Nanoparticles, Gold, Dielectrics, Absorption, Scattering, Plasmonics, Nanolithography, Nanostructures

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Proceedings Article | 23 May 2018 Presentation

Magnetic control of the chiroptical plasmonic surfaces (Conference Presentation)

Irina Zubritskaya, Nicolo Maccaferri, Xabier Ezeiza, Paolo Vavassori, Alexandre Dmitriev

Proceedings Volume 10671, 106711T (2018) https://doi.org/10.1117/12.2306742

KEYWORDS: Magnetism, Plasmonics, Nanoantennas, Plasmons, Nanophotonics, Ferromagnetics, Reflection, Polarization, Integration, Optical components

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Proceedings Article | 25 August 2017 Presentation + Paper

Nanoporous gold decorated with silver nanoparticles as large area efficient SERS substrate

M. Ardini, J. A. Huang, C. Sanchez-Sanchez, P. Ponzellini, N. Maccaferri, A. Jacassi, S. Cattarin, E. Calandrini, D. Garoli

Proceedings Volume 10346, 103460E (2017) https://doi.org/10.1117/12.2273947

KEYWORDS: Plasmonics, Nanoparticles, Nanostructures, Near field, Gold, Surface enhanced Raman spectroscopy, Metals, Raman scattering, Silver, Nanolithography

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Showing 5 of 13 publications

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