Conference Agenda

Topical Meetings and Sessions:

TOM 1 - Silicon Photonics and Guided-Wave Optics
TOM 2 - Computational, Adaptive and Freeform Optics
TOM 3 - Optical System Design, Tolerancing and Manufacturing
TOM 4 - Bio-Medical Optics
TOM 5 - Resonant Nanophotonics
TOM 6 - Optical Materials: crystals, thin films, organic molecules and polymers, syntheses, characterization and devices
TOM 7 - Thermal radiation and energy management
TOM 8 - Nonlinear and Quantum Optics
TOM 9 - Optics at Nanoscale (ONS)
TOM 10 - Optical Microsystems (OMS)
TOM 11 - Waves in Complex Photonic Media
TOM 12 - Optofluidics
TOM 13 - Ultrafast Optical Technologies and Applications
TOM 14 - Advances and Applications of Optics and Photonics
EU Project Session
Early Stage Researcher Session organised by SIOF
Grand Challenges of Photonics Session

More information on the Topical Meetings

Select a date or location to show only sessions at that day or location. Select a single session for detailed view (with abstracts and downloads when you are logged in as registered attendee). Plenary speeches, tutorials, and Early Researcher session will be updated very soon. Thank you for your patience!

Session Overview
TOM7 S04: Thermal radiation and energy management: Ultrafast photothermal dynamics in plasmonic nanoparticles
Wednesday, 15/Sept/2021:
8:15 - 9:45

Session Chair: Alessandro Alabastri, Rice University, United States of America
Location: Sala de Chiostro

1st Floor

8:15 - 8:45
ID: 268 / TOM7 S04: 1
TOM 7 Thermal radiation and energy management

Hot-electron photo-thermal symmetry breaking in plasmonic metastructures for ultrafast nanophotonics

Andrea Schirato1,2, Margherita Maiuri1, Andrea Mazzanti1, Andrea Toma2, Remo Proietti Zaccaria2,3, Alessandro Alabastri4, Peter Nordlander4,5, Paolo Laporta1,6, Giulio Cerullo1,6, Giuseppe Della Valle1,6

1Dipartimento di Fisica, Politecnico di Milano, Italy; 2Istituto Italiano di Tecnologia, Italy; 3Cixi Institute of Biomedical Engineering, Chinese Academy of Sciences, China; 4Department of Electrical and Computer Engineering, Rice University, Texas (USA); 5Department of Physics and Astronomy, Rice University, Texas (USA); 6Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche, Italy

We study the spatio-temporal dynamics of hot electrons generated in plasmonic nanostructures via resonant excitation with ultrashort laser pulses. We found that the subsequent thermo-modulational nonlinearity can result into a transient symmetry breaking of the optical properties at the nanoscale. This effect is exploited in metastructure configurations to achieve all-optical control of light with unprecedented speed.

8:45 - 9:00
ID: 347 / TOM7 S04: 2
TOM 7 Thermal radiation and energy management

Tuning photothermal dynamics in gold nanoparticle-loaded agarose gel for plasmon-enhanced drug release

Andrea Schirato1,2, Luca Moretti1, Andrea Mazzanti1, Arianna Rossetti3, Laura Polito4, Fabio Pizzetti3, Alessandro Sacchetti3, Giulio Cerullo1,5, Filippo Rossi3

1Dipartimento di Fisica, Politecnico di Milano; 2Italian Institute of Technology, Genoa; 3Dipartimeto di Chimica, Materiali, Ingegneria Chimica Giulio Natta; 4Consigilio Nazionale delle Ricerche, CNR-SCITEC; 5Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche

Optical properties of plasmonic nanoparticles make them efficient nanoheaters, able to absorb light and provide local heating. When loaded in organic matrices, resulting hybrid light-sensitive materials are suitable as biomaterial carriers. Here we report on hydrogels loaded with gold nanoparticle assemblies for drug release. Pump-probe spectroscopy and hot-electrons modelling are used to analyse nanoparticle assembling degree, crucial in light-to-heat conversion dynamics. Drug release efficiency is shown to depend on nanoparticle aggregation, governing photothermal properties. A 2 orders of magnitude ehnancement is achieved when involving collective heating in plasmon-assisted drug release.

9:00 - 9:15
ID: 350 / TOM7 S04: 3
TOM 7 Thermal radiation and energy management

Ultrafast temperature dynamics of Au nanoparticles: a model-free approach

Marzia Ferrera1, Giuseppe Della Valle2, Maria Sygletou1, Michele Magnozzi1,3, Daniele Catone4, Patrick O'Keeffe5, Alessandra Paladini5, Francesco Toschi5, Lorenzo Mattera1, Maurizio Canepa1, Francesco Bisio6

1OptMatLab, Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy; 2Dipartimento di Fisica, IFN-CNR, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy; 3INFN, Sezione di Genova, via Dodecaneso 33, 16146 Genova, Italy; 4Istituto di Struttura della Materia - CNR (ISM-CNR), EuroFEL Support Laboratory (EFSL), Via del Fosso del Cavaliere 100, 00133 Rome, Italy; 5Istituto di Struttura della Materia - CNR (ISM-CNR), EuroFEL Support Laboratory (EFSL), 00015 Monterotondo Scalo, Italy; 6CNR-SPIN, Perrone 24, 16152 Genova, Italy

Ultrashort-pulse irradiation of metallic nanoparticles induces an out-of-equilibrium state that dynamically relaxes involving the gradual re-equilibration of the system’s electron gas, lattice and environment. The direct assessment of the dynamic subsystem’s temperatures represents an experimentally challenging task. Here we present an experimental approach for the evaluation of the ultrafast temperature evolution of impulsively-excited gold nanoparticles. By comparing the data obtained by pump-probe transient absorbance spectroscopy with the static thermo-optical response of the nanoparticles, we extract an effective thermometric calibration scale of the relaxation process after the electron-phonon equilibration is achieved.

9:15 - 9:45
ID: 424 / TOM7 S04: 4
TOM 7 Thermal radiation and energy management

Strong photoacoustic response of plasmonic vapor nanobubbles

Samy Merabia1,2, Julien Lombard3, Julien Lam4, François Detcheverry1,2, Thierry Biben2

1CNRS, France; 2Institut Light and Matter, Université Lyon 1, France; 3UNAM, Mexico; 4CEMES, Toulouse, France

Plasmonic vapor nanobubbles are currently considered for a broad range of applications. Here, building on a phase field model, we report on the emission of intense acoustic waves following nanobubble generation. These waves combine a high-pressure peak with a fast pressure rising time opening the way to induce localized damage. Discussing the consequences on biological cell membranes, we conclude that acoustic-mediated perforation is more efficient than nanobubble expansion to breach the membrane. Finally, we illustrate the possibility to enhance the nanobubble photoacoustic response through electron-phonon coupling inside the nanoparticle.