Paolo Biagioni

LATEST NEWS

• May 6th, 2019 - a wonderful collaboration: "Ultrafast generation and control of an electron vortex beam via chiral plasmonic near fields" now published online on Nature Materials! See also the dissemination video online! 
  
  
   
• December 12th, 2018 - the GEMINI consortium goes nonlinear! "Plasmonic mid-infrared third harmonic generation in germanium nanoantennas" just published online on Light: Science & Applications
   
• July 25th, 2018 - "Benchmarking the use of heavily doped Ge for plasmonics and sensing in the mid-infrared" just published online on ACS Photonics: How good is Ge compared to Au for mid-IR plasmonics?
   
• June 13th, 2018 - Superchiral surface waves on the cover of Chirality!
  
  
   
• June 1st, 2018 - Chiral plasmons meet electrons on arXiv: "Generation and control of an ultrafast electron vortex beam via chiral plasmonic near-fields"
   
• April 30th, 2018 - Our sensitivity test on Plasmon-Enhanced Second Harmonic Sensing is finally out in J. Phys. Chem. C! 
   
• March 27th, 2018 - "Superchiral surface waves for all-optical enantiomer separation" just posted on arXiv: from chiroptical spectroscopy to chiral forces!!!
   
• March 9th, 2018 - "Evidence for cascaded third harmonic generation in non-centrosymmetric gold nanoantennas", i.e., SHG matters for THG as well!
   
• January 30th, 2018 - "Limits of Kirchhoff’s Laws in Plasmonics": how careful should we be when using impedance descriptions for plasmonic nanocircuits?
   
• November 21st, 2017 - Finally out! Check our publication "Near-field imaging of free carriers in ZnO nanowires with a scanning probe tip made of heavily doped germanium", the result of a collaboration with the Molecular Foundry at Berkeley.
   
• October 26th, 2017 - Another step towards heavier doping in Ge on Si by the GEMINI consortium: "Optical properties of highly n-type doped germanium obtained by in situ doping and laser annealing"
   
• June 6th, 2017 - Surface waves, with a twist! "Chiral surface waves for enhanced circular dichroism" published online on Phys. Rev. B.
   
• February 7th, 2017 - Our PRIN 2015 project "Plasmon-enhanced vibrational circular dichroism" just started! We will investigate plasmonic superchirality to study chiral molecules in the mid-infrared.
   
• October 20th, 2016 - "Local Field Enhancement: Comparing Self-Similar and Dimer Nanoantennas" just published on J. Phys. Chem. C: are self-similar nanolenses really the best choice for extreme field enhancements?
   
• June 28th, 2016 - "Optical Activation of Germanium Plasmonic Antennas in the Mid Infrared" accepted for publication on Physical Review Letters! The paper describes the activity of the GEMINI project on all-optical ultrafast plasmonics in the mid-infrared.
   

Curriculum vitae

I studied at Politecnico di Milano (Italy), where I first got my Degree in Electronic Engineering in 2003 and then the Ph.D. in Physics under the supervision of Prof. Lamberto Duò, working on linear and non-linear near-field microscopy and on the near-field properties of metal nanoparticles. I received the Ph.D. in 2007 with the dissertation "Field enhancement and confinement at optical wavelengths: nonlinear near-field microscopy and resonant metal nanoparticles". During the Ph.D., I also worked in Basel (Switzerland) by the group of Prof. Dieter Pohl and Prof. Bert Hecht, working on resonant optical antennas.

After a one-year Post Doc in Milano, in 2008 I was awarded a Humboldt Fellowship for Postdoctoral Researchers, which I spent working in the group of Prof. Bert Hecht in Würzburg (Germany) focusing on near-field polarization engineering with optical cross antennas and on the impedance description of plasmonic antenna circuits.

I have been Assistant Professor (Ricercatore) since 2010 and Associate Professor since 2014 at the Physics Department, Politecnico di Milano (Italy).

My research interests are in nano-optics and plasmonics. At present my main activities are focused on:

• Polarization control and chirality at the nanoscale
• Linear and nonlinear properties of Au nanoantennas
• Mid-infrared plasmonics and sensing with heavily-doped Ge materials

I was the coordinator of the FET-Open EU project GEMINI ("GErmanium Mid-Infrared plasmoNIcs for sensing") and I am currently the coordinator of the PRIN project "Plasmon enhanced vibrational circular dichroism".

Selected publications (see the links at the bottom of the page for the full publication list)

• G. Pellegrini, M. Finazzi, M. Celebrano, L. Duò, and P. Biagioni
  “Chiral surface waves for enhanced circular dichroism” - Phys. Rev. B 95, 241402(R) (2017).
• M. P. Fischer, Ch. Schmidt, E. Sakat, J. Stock, A. Samarelli, J. Frigerio, M. Ortolani, D. J. Paul, G. Isella, A. Leitenstorfer, P. Biagioni, and D. Brida
  “Optical activation of germanium plasmonic nanoantennas in the mid infrared” - Phys. Rev. Lett. 117, 047401 (2016).
• E. Sakat, I. Bargigia, M. Celebrano, A. Cattoni, S. Collin, D. Brida, M. finazzi, C. D’Andrea, and P. Biagioni
  "Time-resolved photoluminescence in gold nanoantennas" - ACS Photonics 3, 1489 (2016).
• L. Baldassarre, E. Sakat, J. Frigerio, A. Samarelli, K. Gallacher, E. Calandrini, G. Isella, D. K. Paul, M. Ortolani, and P. Biagioni
  "Midinfrared plasmon-enhanced spectroscopy with germanium antennas on silicon substrates" - Nano Lett. 15, 7225 (2015).
• M. Celebrano, X. Wu, M. Baselli, S. Großmann, P. Biagioni, A. Locatelli, C. De Angelis, G. Cerullo, R. Osellame, B. Hecht, L. Duò, F. Ciccacci, and M. Finazzi
  "Mode matching in multiresonant plasmonic nanoantennas for enhanced second harmonic generation" - Nature Nanotechnology 10, 412 (2015).
• F. Bottegoni, M. Celebrano, M. Bollani, P. Biagioni, G. Isella, F. Ciccacci, and M. Finazzi
  "Spin voltage generation through optical excitation of complementary spin populations" - Nature Mater. 13, 790 (2014).
• P. Biagioni, D. Brida, J.-S. Huang, J. Kern, L. Duò, B. Hecht, M. Finazzi, and G. Cerullo
  "Dynamics of four-photon photoluminescence in gold nanoantennas" - Nano Lett. 12, 2941 (2012).
• P. Biagioni, J.-S. Huang, and B. Hecht
  "Nanoantennas for visible and infrared radiation" - Rep. Prog. Phys. 75, 024402 (2012).
• P. Biagioni, M. Savoini, J.-S. Huang, L. Duò, M. Finazzi, and B. Hecht
  “Near-field polarization shaping by a near-resonant plasmonic cross antenna” - Phys. Rev. B 80, 153409 (2009)
• P. Biagioni, M. Celebrano, M. Savoini, G. Grancini, D. Brida, S. Mátéfi-Tempfli, M. Mátéfi-Tempfli, L. Duò, B. Hecht, G. Cerullo, and M. Finazzi
  “Dependence of the two-photon photoluminescence yield of gold nanostructures on the laser pulse duration” - Phys. Rev. B 80, 045411 (2009).
• P. Biagioni, J. S. Huang, L. Duò, M. Finazzi, and B. Hecht
  “Cross resonant optical antenna” - Phys. Rev. Lett. 102, 256801 (2009).