Andrea Ballabio
PhD student
Contact
e-mail: | |
tel: | Como: +39 031 332 7307 |
fax: | Como: +39 031 332 7617 |
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address: | Politecnico di Milano |
| Polo di Como |
| Via Anzani 42 |
| 22100 Como |
| Italy |
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office: | Via Anzani T.02 |
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Main Research Interest
Publications
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B. Severin, D. T. Lennon, L. C. Camenzind, F. Vigneau, F. Fedele, D. Jirovec, A. Ballabio, D. Chrastina, G. Isella, M. de Kruijf, M. J. Carballido, S. Svab, A. V. Kuhlmann, S. Geyer, F. N. M. Froning, H. Moon, M. A. Osborne, D. Sejdinovic, D. Sejdinovic, G. Katsaros, D. M. Zumbühl, G. A. D. Briggs, and N. Ares: Cross-architecture tuning of silicon and SiGe-based quantum devices using machine learning, Sci. Reports 14, 17281 (2024).
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M. Valentini, O. Sagi, L. Baghumyan, T. de Gijsel, J. Jung, S. Calcaterra, A. Ballabio, J. A. Servin, K. Aggarwal, M. Janik, T. Adletzberger, R. S. Souto, M. Leijnse, J. Danon, C. Schrade, E. Bakkers, D. Chrastina, G. Isella, and G. Katsaros: Parity-conserving Cooper-pair transport and ideal superconducting diode in planar germanium, Nature Communications 15, 169 (2024).
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G. M. Vanacore, D. Chrastina, E. Scalise, L. Barbisan, A. Ballabio, M. Mauceri, F. La Via, G. Capitani, D. Crippa, A. Marzegalli, R. Bergamaschini, and L. Miglio: Nanostructured 3C-SiC on Si by a network of (111) platelets: a fully textured film generated by intrinsic growth anisotropy, Phys. Chem. Chem. Phys. 24, 24487 (2022).
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V. Falcone, A. Ballabio, A. Barzaghi, C. Zucchetti, L. Anzi, F. Bottegoni, J. Frigerio, R. Sordan, P. Biagioni, and G. Isella: Graphene/Ge microcrystal photodetectors with enhanced infrared responsivity, APL Photonics 7, 106102 (2022).
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D. Jirovec, P. M. Mutter, A. Hofmann, A. Crippa, M. Rychetsky, D. L. Craig, J. Kukucka, F. Martins, A. Ballabio, N. Ares, D. Chrastina, G. Isella, G. Burkard, and G. Katsaros: Dynamics of hole singlet triplet qubits with large g-factor differences.Phys. Rev. Lett. 128, 126803 (2022).
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C. Ciano, J. Frigerio, J. Kuttruff, A. Mancini, A. Ballabio, D. Chrastina, V. Falcone, M. D. L. Baldassarre, J. Allerbeck, D. Brida, L. Zeng, E. Olsson, M. Virgilio, and M. Ortolani: Toward high-performance and reliable Ge channel devices for 2 nm node and beyond, 2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) 2021, 9567195 (2021).
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J. Frigerio, C. Ciano, J. Kuttruff, A. Mancini, A. Ballabio, D. Chrastina, V. Falcone, M. De Seta, L. Baldassarre, J. Allerbeck, D. Brida, L. Zeng, E. Olsson, M. Virgilio, and M. Ortolani: Second harmonic generation in germanium quantum wells, ACS Photonics 8, 3573 (2021).
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D. Jirovec, A. Hofmann, A. Ballabio, P. M. Mutter, G. Tavani, M. Botifoll, A. Crippa, J. Kukucka, O. Sagi, F. Martins, J. Saez-Mollejo, I. Prieto, M. Borovkov, J. Arbiol, D. Chrastina, G. Isella, and G. Katsaros: A singlet triplet hole spin qubit in planar Ge, Nature Mater. 20, 1106 (2021).
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J. Frigerio, C. Ciano, A. Ballabio, D. Chrastina, J. Allerbeck, J. Kuttruff, L. Zeng, E. Olsson, D. Brida, G. Isella, M. Virgilio, and M. Ortolani: Mid-infrared second harmonic generation in Ge/SiGe coupled quantum wells.In 2020 IEEE Photonics Conference (IPC), 1--2 (2020). [ DOI ]
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S. Prucnal, , M. O. Liedke, X. Wang, M. Butterling, M. Posselt, J. Knoch, H. Windgassen, E. Hirschmann, Y. Berencén, L. Rebohle, M. Wang, E. Napoltani, J. Frigerio, A. Ballabio, G. Isella, R. Hübner, A. Wagner, H. Bracht, M. Helm, and S. Zhou: Dissolution of donor-vacancy clusters in heavily doped n-type germanium, New J. Phys. 22, 123036 (2020).
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J. Pedrini, P. Biagioni, A. Ballabio, A. Barzaghi, M. Bonzi, E. Bonera, G. Isella, and F. Pezzoli: Broadband control of the optical properties of semiconductors through site-controlled self-assembly of microcrystals, Opt. Express 28, 24981 (2020).
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A. Barzaghi, S. Firoozabadi, M. Salvalaglio, R. Bergamaschini, A. Ballabio, A. Beyer, M. Albani, J. Valente, A. Voigt, D. J. Paul, L. Miglio, F. Montalenti, K. Volz, , and G. Isella: Self-assembly of nanovoids in si microcrystals epitaxially grown on deeply patterned substrates, Cryst. Growth Des. 20, 2914 (2020).
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R. Milazzo, C. Carraro, J. Frigerio, A. Ballabio, G. Impellizzeri, D. Scarpa, A. Andrighetto, G. Isella, and E. Napolitani: Ex-situ doping of epitaxially grown Ge on Si by ion-implantation and pulsed laser melting, Appl. Surf. Sci. 509, 145277 (2020).
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C. Zucchetti, A. Ballabio, D. Chrastina, S. Cecchi, M. Finazzi, M. Virgilio, G. Isella, and F. Bottegoni: Probing the in-plane electron spin polarization in Ge/Si0.15Ge0.85 multiple quantum wells, Phys. Rev. B 101, 115408 (2020).
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A. Bashir, R. W. Millar, K. Gallacher, D. J. Paul, A. D. Darbal, R. Stroud, A. Ballabio, J. Frigerio, G. Isella, and I. MacLaren: Strain analysis of a Ge micro disk using precession electron diffraction, J. Appl. Phys. 126, 235701 (2019).
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A. Ballabio, S. Bietti, A. Scaccabarozzi, L. Esposito, S. Vichi, A. Fedorov, A. Vinattieri, C. Mannucci, F. Biccari, A. Nemcsis, L. Toth, L. Miglio, M. Gurioli, G. Isella, and S. Sanguinetti: GaAs epilayers grown on patterned (001) silicon substrates via suspended Ge layers, Sci. Reports 9, 17529 (2019).
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A. Ballabio, J. Frigerio, S. Firoozabadi, D. Chrastina, A. Beyer, K. Volz, and G. Isella: Ge/SiGe parabolic quantum wells, J. Phys. D: Appl. Phys. 52, 415105 (2019).
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A. De Iacovo, A. Ballabio, J. Frigerio, L. Colace, and G. Isella: Design and simulation of Ge-on-Si photodetectors with electrically tunable spectral response, J. Lightwave Technol. 37, 3517 (2019).
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Q. Liu, J. M. Ramírez, V. Vakarin, D. Benedikovic, C. Alonso-Ramos, J. Frigerio, A. Ballabio, G. Isella, L. Vivien, and D. Marris-Morini: 7.5-μm wavelength fiber-chip grating couplers for Ge-rich SiGe photonics integrated circuits.In R. G. Baets, P. O'Brien, and L. Vivien (eds.), Silicon Photonics: From Fundamental Research to Manufacturing, volume Proc. SPIE 10686, 106860O (2018).
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J. Frigerio, A. Ballabio, M. Ortolani, and M. Virgilio: Modeling of second harmonic generation in hole-doped silicon-germanium quantum wells for mid-infrared sensing, Opt. Express 26, 31861 (2018).
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D. Marris-Morini, V. Vakarin, J. M. Ramirez, Q. Liu, A. Ballabio, J. Frigerio, M. Montesinos, C. Alonso-Ramos, X. Le Roux, S. Serna, D. Benedikovic, D. Chrastina, L. Vivien, and G. Isella: Germanium-based integrated photonics from near- to mid-infrared applications, Nanophotonics 7, 1781 (2018).
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J. M. Ramírez, V. Vakarin, Q. Liu, J. Frigerio, A. Ballabio, X. Le Roux, D. Benediktovic, C. Alonso-Ramos, G. Isella, L. Vivien, and D. Marris-Morini: Ge-rich graded-index Si1-xGex devices for MID-IR integrated photonics, Proc. SPIE Int. Soc. Opt. Eng. 10537, 105370R (2018).
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Q. Liu, J. M. Ramirez, V. Vakarin, X. Le Roux, A. Ballabio, J. Frigerio, D. Chrastina, G. Isella, D. Bouville, L. Vivien, C. A. Ramos, and D. Marris-Morini: Mid-infrared sensing between 5.2 and 6.6 μm wavelengths using Ge-rich SiGe waveguides, Opt. Mater. Express 8, 1305 (2018).
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A. Bashir, K. Gallacher, R. W. Millar, D. J. Paul, A. Ballabio, J. Frigerio, G. Isella, D. Kriegner, M. Ortolani, J. Barthel, and I. MacLaren: Interfacial sharpness and intermixing in a Ge-SiGe multiple quantum well structure, J. Appl. Phys. 123, 035703 (2018).
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S. Prucnal, J. Frigerio, E. Napolitani, A. Ballabio, Y. Berencén, L. Rebohle, M. Wang, R. Böttger, M. Voelskow, G. Isella, R. Hübner., M. Helm, S. Zhou, and W. Skorupa: In situ ohmic contact formation for n-type Ge via non-equilibrium processing.Semicond. Sci. Technol. 32, 115006 (2017).
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F. Biccari, L. Esposito, C. Mannucci, A. G. Taboada, S. Bietti, A. Ballabio, A. Fedorov, G. Isella, H. von Känel, L. Miglio, S. Sanguinetti, A. Vinattieri, and M. Gurioli: Site-controlled natural GaAs(111) quantum dots fabricated on vertical GaAs/Ge microcrystals on deeply patterned Si(001) substrates, Nanosci. Nanotechnol. Lett. 9, 1108 (2017).
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J. Frigerio, V. Vakarin, P. Chaisakul, A. Ballabio, D. Chrastina, M. Leone, X. Le Roux, L. Vivien, G. Isella, and D. Marris-Morini: Electro-refraction in standard and symmetrically coupled Ge/SiGe quantum wells, Nanosci. Nanotechnol. Lett. 9, 1123 (2017).
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V. Vakarin, J. M. Ramírez, J. Frigerio, A. Ballabio, X. Le Roux, Q. Liu, D. Bouville, L. Vivien, G. Isella, and D. Marris-Morini: Ultra-wideband Ge-rich silicon germanium integrated Mach--Zehnder interferometer for mid-infrared spectroscopy, Optics Lett. 42, 3482 (2017).
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V. Vakarin, P. Chaisakul, J. Frigerio, A. Ballabio, J. M. Ramírez, X. Le Roux, J. R. Coudevylle, L. Vivien, G. Isella, and D. Marris-Morini: Polarization insensitive Ge-rich silicon germanium waveguides for optical interconnects on silicon.In P. Cheben, J. Čtyroký, and I. nigo Molina-Fernández (eds.), Integrated Optics: Physics and Simulations III, volume Proc. SPIE 10242, 102420T (2017).
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J. M. Ramírez, V. Vakarin, P. Chaisakul, J. Frigerio, A. Ballabio, C. Gilles, D. Chrastina, Q. Liu, G. Maisons, X. Le Roux, L. Vivien, M. Carras, G. Isella, and D. Marris-Morini: Ge-rich SiGe waveguides for mid-infrared photonics, Proc. SPIE Int. Soc. Opt. Eng. 10108, 1010812 (2017).
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J. M. Ramírez, V. Vakarin, J. Frigerio, P. Chaisakul, D. Chrastina, X. Le Roux, A. Ballabio, L. Vivien, G. Isella, and D. Marris-Morini: Ge-rich graded-index Si1-xGex waveguides with broadband tight mode confinement and flat anomalous dispersion for nonlinear mid-infrared photonics, Opt. Express 25, 6561 (2017).
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K. Gallacher, A. Ballabio, R. W. Millar, J. Frigerio, A. Bashir, I. MacLaren, G. Isella, M. Ortolani, and D. J. Paul: Mid-infrared intersubband absorption from p-Ge quantum wells grown on Si substrates, Appl. Phys. Lett. 108, 091114 (2016).
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J. M. Ramírez, V. Vakarin, M. Rahman, P. Chaisakul, X. Le Roux, L. Vivien, D. Marris-Morini, D. Chrastina, J. Frigerio, A. Ballabio, and G. Isella: Broadband single mode SiGe graded waveguides with tight mode confinement for mid-infrared photonics.In IEEE Photonics North, 1 (2016).
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V. Vakarin, P. Chaisakul, J. Frigerio, A. Ballabio, X. Le Roux, J. R. Coudevylle, L. Vivien, G. Isella, and D. Marris-Morini: Silicon germanium on graded buffer as a new platform for optical interconnects on silicon.In H. Schröder and R. T. Chen (eds.), Optical Interconnects XVI, volume Proc. SPIE 9753, 975309 (2016).
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J. Frigerio, V. Vakarin, P. Chaisakul, A. Ballabio, D. Chrastina, X. Le Roux, L. Vivien, G. Isella, and D. Marris-Morini: Electro-absorption and electro-refraction in Ge/SiGe coupled quantum wells.In L. Vivien, L. Pavesi, and S. Pelli (eds.), Silicon Photonics and Photonic Integrated Circuits V, volume Proc. SPIE 9891, 989113 (2016).
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R. W. Millar, K. Gallacher, J. Frigerio, A. Ballabio, A. Bashir, I. MacLaren, G. Isella, and D. J. Paul: Analysis of Ge micro-cavities with in-plane tensile strains above 2%, Opt. Express 24, 4365 (2016).
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K. Gallacher, A. Ballabio, R. W. Millar, A. Samarelli, J. Frigerio, D. Chrastina, G. Isella, L. Baldassarre, M. Ortolani, E. Sakat, P. Biagioni, and D. J. Paul: Mid-infrared intersubband absorption in p-Ge/SiGe quantum wells grown on Si.In IEEE 12th Int. Conf. Group IV Photonics, 15--16 (2015).
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V. Vakarin, P. Chaisakul, J. Frigerio, A. Ballabio, X. Le Roux, J.-R. Coudevylle, D. Bouville, D. Perez-Galacho, L. Vivien, G. Isella, and D. Marris-Morini: Sharp bends and Mach--Zehnder interferometer based on Ge-rich-SiGe waveguides on SiGe graded buffer, Opt. Express 23, 30821 (2015).
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