Dr. Giuseppe Della Valle Profile

Dr. Giuseppe Della Valle

Doctoral Student at Politecnico di Milano

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Publications (13)

Proceedings Article | 7 March 2022 Presentation + Paper

Photoinduced transient symmetry breaking in plasmonic structures for ultrafast nanophotonics

Andrea Schirato, Margherita Maiuri, Remo Proietti Zaccaria, Alessandro Alabastri, Giulio Cerullo, Giuseppe Della Valle

Proceedings Volume 11999, 1199902 (2022) https://doi.org/10.1117/12.2607177

KEYWORDS: Plasmonics, Ultrafast phenomena, Electrons, Diffraction, Picosecond phenomena, Nanophotonics, Gold, Nanostructures, Nonlinear optics, Beam controllers

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Proceedings Article | 1 April 2020 Presentation

Enhancing and switching harmonic generation in plasmonic and dielectric nanoantennas (Conference Presentation)

Lavinia Ghirardini, Eva Aurelia Arianna Pogna, Attilio Zilli, Paolo Biagioni, Lamberto Duò, Giovanni Pellegrini, Francesco Rusconi, Andrea Locatelli, Luca Carletti, Davide Rocco, Carlo Gigli, Giuseppe Marino, Aristide Lemaître, Andrea Mazzanti, Giuseppe Della Valle, Xiaofei Wu, Bert Hecht, Giulio Cerullo, Giuseppe Leo, Costantino De Angelis, Marco Finazzi, Michele Celebrano

Proceedings Volume 11344, 113440J (2020) https://doi.org/10.1117/12.2554643

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Nanoscale optical integration is nowadays a strategic technological challenge and the ability of generating and manipulating nonlinear optical processes in sub-wavelength volumes is pivotal to realize efficient sensing probes and photonic sources for the next-generation communication technologies. Yet, confining nonlinear processes below the diffraction limit remains a challenging task because phase-matching is not a viable approach at the nanoscale. The localized fields associated to the resonant modes of plasmonic and dielectric nanoantennas offer a route to enhance and control nonlinear processes in highly confined volumes. In my talk I will discuss two nonlinear platforms based on plasmonic and dielectric nanostructures. The first relies on a broken symmetry antenna design, which brings about an efficient second harmonic generation (SHG). We recently applied this concept to an extended array of non-centrosymmetric nanoantennas for sensing applications. I will also show the evidence of a cascaded second-order process in Third Harmonic Generation (THG) in these nanoantennas. Recently, dielectric nanoantennas emerged as an alternative to plasmonic nanostructures for nanophotonics applications, thanks to their sharp magnetic and electric Mie resonances along with the low ohmic losses in the visible/near-infrared region of the spectrum. I will present our most recent studies on the nonlinear properties of AlGaAs dielectric nanopillars. The strong localized modes along with the broken symmetry in the crystal structure of AlGaAs allow obtaining more than two orders of magnitude higher SHG efficiency with respect to plasmonic nanoantennas with similar spatial footprint and using the same pump power. I will also discuss a few key strategies we recently adopted to optically switch the SHG in these antennas even on the ultrafast time scale. Finally, I will show how to effectively engineer the sum frequency generation via the Mie resonances in these nanoantennas. These results draw a viable blueprint towards room-temperature all optical logic operation at the nanoscale.

Proceedings Article | 9 September 2019 Paper

Self-organized metasurfaces enabling plasmon hybridization

M. C. Giordano, M. Barelli, A. Mazzanti, G. Della Valle, F. Buatier de Mongeot

Proceedings Volume 11082, 110821K (2019) https://doi.org/10.1117/12.2529154

KEYWORDS: Self organized materials, Surface enhanced Raman spectroscopy, Plasmonics, Gold, Plasmons, Near field, Near field optics, Biosensing, Scanning electron microscopy, Silica, Spectroscopy, Nanoantennas

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Proceedings Article | 17 May 2018 Paper

One-dimensional disordered photonic structures with two or more materials

Alessandro Chiasera, Luigino Criante, Stefano Varas, Giuseppe Della Valle, Roberta Ramponi, Maurizio Ferrari, Lidia Zur, Anna Lukowiak, Ilka Kriegel, Michele Bellingeri, Davide Cassi, Francesco Scotognella

Proceedings Volume 10683, 106832M (2018) https://doi.org/10.1117/12.2306306

KEYWORDS: Photonics, Refractive index, Photonic crystals, Disordered photonic crystals, Optical properties, Multilayers

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Proceedings Article | 16 February 2017 Paper

Tailoring the optical properties of one-dimensional (1D) photonic structures

Alessandro Chiasera, Luigino Criante, Stefano Varas, Giuseppe Della Valle, Roberta Ramponi, Maurizio Ferrari, Ilka Kriegel, Michele Bellingeri, Davide Cassi, Giancarlo Righini, Francesco Scotognella

Proceedings Volume 10100, 101001D (2017) https://doi.org/10.1117/12.2251856

KEYWORDS: Photonic crystals, Optical properties, Refractive index, Optical filters, Disordered photonic crystals, Fabrication, Photovoltaics, Photonic devices, Optical fibers, Reflectors, Solar energy, Modulation, Sputter deposition, Semiconductors, Crystals

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Proceedings Article | 28 February 2009 Paper

Single-frequency glass waveguide lasers

S. Taccheo, G. Della Valle, D. Barbier

Proceedings Volume 7193, 71930T (2009) https://doi.org/10.1117/12.812390

KEYWORDS: Waveguides, Waveguide lasers, Glasses, Fiber Bragg gratings, High power lasers, Laser resonators, Fiber lasers, Ytterbium, Fabrication, LIDAR

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Proceedings Article | 20 October 2008 Paper

Single-frequency glass waveguide lasers

S. Taccheo, G. Della Valle, D. Milanese

Proceedings Volume 7111, 711103 (2008) https://doi.org/10.1117/12.800408

KEYWORDS: Glasses, Waveguides, Waveguide lasers, Laser resonators, Fabrication, Fiber Bragg gratings, Fiber lasers, Mirrors, Ytterbium, Thulium

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Proceedings Article | 12 August 2008 Paper

Slow-light plasmonic metal nano-strip resonators

Thomas Søndergaard, Sergey Bozhevolnyi, Jesper Jung, Jonas Beermann, Guiseppe Della Valle, Alexandra Boltasseva

Proceedings Volume 7099, 70991G (2008) https://doi.org/10.1117/12.804820

KEYWORDS: Resonators, Metals, Gold, Scattering, Plasmons, Quartz, Polaritons, Radio propagation, Wave propagation, Surface plasmon polaritons

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Proceedings Article | 20 February 2007 Paper

Advanced waveguide lasers fabricated by femtosecond laser writing in an Er:Yb-doped phosphate glass

Giuseppe Della Valle, Roberto Osellame, Stefano Taccheo, Nicola Chiodo, Gianluca Galzerano, Giulio Cerullo, Paolo Laporta, Roberta Ramponi, Uwe Morgner, Aleksey Rozhin, Vittorio Scardaci, Andrea Ferrari

Proceedings Volume 6469, 64690J (2007) https://doi.org/10.1117/12.700458

KEYWORDS: Waveguide lasers, Mode locking, Waveguides, Femtosecond phenomena, Fiber Bragg gratings, Fiber lasers, Glasses, Pulsed laser operation, Laser applications, Picosecond phenomena

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Proceedings Article | 25 April 2006 Paper

Group delay control of picosecond optical pulses in superstructured fiber Bragg gratings

D. Janner, D. Gatti, G. Galzerano, G. Della Valle, P. Laporta, S. Longhi

Proceedings Volume 6187, 61870A (2006) https://doi.org/10.1117/12.664832

KEYWORDS: Picosecond phenomena, Fiber Bragg gratings, Dispersion, Optical communications, Modulation, Optical design, Refractive index, Distortion, Wave propagation, Modulators

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Proceedings Article | 24 February 2006 Paper

Active and passive integrated optical devices written in glasses with femtosecond laser systems

R. Osellame, N. Chiodo, G. Della Valle, S. Taccheo, G. Cerullo, R. Ramponi, P. Laporta, A. Killi, U. Morgner

Proceedings Volume 6123, 61230V (2006) https://doi.org/10.1117/12.648325

KEYWORDS: Waveguides, Femtosecond phenomena, Semiconductor lasers, Glasses, Optical fibers, Waveguide lasers, Oscillators, Standards development, Microscopes, Laser systems engineering

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Proceedings Article | 12 October 2005 Paper

Novel solid state lasers for Lidar applications at 2 µm

G. Della Valle, G. Galzerano, A. Toncelli, M. Tonelli, P. Laporta

Proceedings Volume 5958, 59581H (2005) https://doi.org/10.1117/12.619930

KEYWORDS: Crystals, Holmium, Laser crystals, Thulium, LIDAR, Solid state lasers, Fluorine, Luminescence, Mirrors, Absorption

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Proceedings Article | 21 March 2005 Paper

Waveguide amplifiers and lasers written by femtosecond laser pulses

Roberto Osellame, Nicola Chiodo, Giuseppe Della Valle, Stefano Taccheo, Roberta Ramponi, Paolo Laporta, Giulio Cerullo, Alexander Killi, Uwe Morgner, Max Lederer, Daniel Kopf

Proceedings Volume 5714, (2005) https://doi.org/10.1117/12.601555

KEYWORDS: Waveguides, Femtosecond phenomena, Waveguide lasers, Semiconductor lasers, Oscillators, Optical fibers, Standards development, Glasses, Microscopes, Wave propagation

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Showing 5 of 13 publications

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