Dear Students,

You are cordially invited to attend the Research Seminar:

Title: Recent Advances in Hybrid Plasmonic Nanosources of Light

Speaker: Prof. Renaud Bachelot, University of Technology of Troyes (UTT)

Time: 10 AM – 11 AM, April 03, 2025

Location: C202, VinUniversity

About the Lecture:

Rapid growth of the nanophotonics area requires the development of advanced nanosources of light whose geometry must be scalable with nanophotonic devices and whose tunability must be simple and efficient. Over the past two decades, hybrid plasmonic nanosources based on energy transfer between metal nanoparticles and semiconductor quantum dots/nanocrystals (QDs) or organic dyes have turned out to constitute a promising solution of efficient optical nanosources. We will discuss the different regimes of coupling between an active medium and a metallic nanoparticle that is seen as a nanocavity or a nanoantenna, and will stress the importance to control the nanoscale spatial distribution, and related symmetry, of the active medium.

In microscale optoelectronics, the possibility to precisely control the spatial distribution of the active medium leads to optimization of systems and devices. At the nanoscale, this issue still constitutes a challenge.

We studied and exploited the nanoscale spatial positioning of semiconductor quantum emitters in the close vicinity of metal nanostructures. The control relies on plasmon-assisted nano-polymerization of a photosensitive formulation that hosts nano-emitters. In addition to offering a promising platform for nanochemistry, this approach enables the design of the symmetry of the medium surrounding plasmonic nano-antenna.

Through selected examples, we will show that this approach has opened many new avenues and exciting concepts, such as

• Polarization-sensitive photoluminescence
• Lifetime engineering
• Control of the local space symmetry group
• Single photon switch that is driven by polarization

About the Speaker:

Renaud BACHELOT (RB) is a full professor of physics at the University of Technology of Troyes (UTT) that he joined in 1996 after graduate studies and PhD at the University of Paris-Cité and ESPCI graduate school (Paris, University PSL). His area of expertise includes nano-optics, nanophotonics, near-field optics, local light/polymer interaction, scanning probe microscopy, nano-optoelectronics and hybrid nanoplasmonics.

He recently joined the CINTRA Lab in Singapore (CNRS/Nanyang Technological University /Thales) as an adjunct Senior Research Scientist.

At UTT, R. Bachelot is the director of the Graduate School “Nanooptics & Nanophotonics” ([nano-phot.utt.fr]nano-phot.utt.fr) including both master and PhD programs.

From 2011 to 2019, RB has been the director of the Light, nanomaterials nanotechnologies CNRS Laboratory involving more than 100 people ([l2n.utt.fr]l2n.utt.fr). His national and international influence includes current and past activities and positions such as (e.g.) adjunct professor at the LuMin Laboratory (University of Paris-Saclay), Board Member of the Faculty of Physics of Sorbonne University, elected board member of the French Society of Physics, condensed matter section division, adjunct-professor of the Shanghai University (since 2019, “1000-talents” award since 2020), invited scholar in Argonne National Laboratory, USA, and chair of the NFO-15 international conference that took place in August 2018 in Troyes, France. RB has (co)supervised 24 PhD students and is the co-author of more than 130 peer-reviewed articles (H=47, cf. google scholar), 10 book chapters and 5 patents.

Register using the following LINK.

Please feel free to forward this information to anyone who might benefit from these insights. The event is free and open to all.