Dr. Eva Arianna Aurelia Pogna Profile

Dr. Eva Arianna Aurelia Pogna

at Istituto Nanoscienze

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Author

Publications (6)

Proceedings Article | 9 March 2024 Presentation

Multiwavelenght QCL nanoscopy on large area topological insulators

Leonardo Viti, Valentino Pistore, Eva A. Pogna, Miriam Vitiello

Proceedings Volume PC12895, PC128950H (2024) https://doi.org/10.1117/12.3009177

KEYWORDS: Quantum cascade lasers, Terahertz radiation, Super resolution microscopy, Dielectrics, Spatial resolution, Polaritons, Near field scanning optical microscopy, 2D materials, Ultrafast phenomena, Tomography

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Proceedings Article | 17 March 2023 Presentation

Terahertz detectorless hyperspectral near-field imaging and spectroscopy exploiting QCL frequency combs

Valentino Pistore, Eva A. Pogna, Leonardo Viti, Lianhe Li, Giles Davies, Edmund Linfield, Miriam Vitiello

Proceedings Volume PC12430, PC124300C (2023) https://doi.org/10.1117/12.2650684

KEYWORDS: Imaging spectroscopy, Near field, Terahertz radiation, Quantum cascade lasers, Sensors, Near field optics, Hyperspectral imaging, Image sensors, Frequency combs, Super resolution microscopy

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Proceedings Article | 17 March 2023 Presentation

Phase-locked low spatial coherence emission in random quantum cascade lasers for hyperspectral nano-imaging in the THz range

Alessandra Di Gaspare, Eva A. Pogna, Valentino Pistore, Elisa Riccardi, Harvey Beere, David Ritchie, Lianhe Li, Giles Davies, Edmund Linfield, Andrea Ferrari, Miriam Vitiello

Proceedings Volume PC12430, PC124300A (2023) https://doi.org/10.1117/12.2650560

KEYWORDS: Quantum cascade lasers, Spatial coherence, Terahertz radiation, Nanoimaging, Laser scattering, Random lasers, Mode locking, Laser optics, Tomography, Temporal coherence

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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.

SPIE Journal Paper | 5 November 2015 Open Access

Femtosecond spectroscopy on MoS₂ flakes from liquid exfoliation: surfactant independent exciton dynamics

Daniele Vella, Victor Vega-Mayoral, Christoph Gadermaier, Natasa Vujicic, Tetiana Borzda, Peter Topolovsek, Matej Prijatelj, Iacopo Tempra, Eva Arianna Aurelia Pogna, Giulio Cerullo

JNP, Vol. 10, Issue 01, 012508, (November 2015) https://doi.org/10.1117/12.10.1117/1.JNP.10.012508

KEYWORDS: Molybdenum, Excitons, Picosecond phenomena, Femtosecond phenomena, Spectroscopy, Liquids, Absorption, Raman spectroscopy, Sodium, Nanomaterials

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Proceedings Article | 8 September 2015 Paper

Intervalley scattering in monolayer MoS2 probed by non-equilibrium optical techniques

Stefano Dal Conte, Federico Bottegoni, E. A. A. Pogna, D. De Fazio, S. Ambrogio, I. Bargigia, C. D'Andrea, A. Lombardo, M. Bruna, F. Ciccacci, A. Ferrari, G. Cerullo, M. Finazzi

Proceedings Volume 9551, 95510W (2015) https://doi.org/10.1117/12.2186692

KEYWORDS: Picosecond phenomena, Excitons, Polarization, Scattering, Dichroic materials, Transition metals, Temporal resolution, Electrons, Photodiodes, Graphene

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