Photons, phonons, plasmons…

A new publication from Guido Pupillo‘s team, in collaboration with us, just appeared in the asap section of ACS Photonics. It shows that, intrinsic surface plasmon-phonon polaritons in a metallic crystal, resulting from hybridized plasmons-phonons modes coupled to photonic degrees of freedom, offer a unique opportunity to control the material properties of the crystal, without the use of an external resonator. More details in the publications page.

Femtonewtons and tens of picometers

Another publication appeared in Physical Review Applied last week ! This study presents a method to measure radiation pressure on metallic nanoparticles down to the thermal limit, with a large dynamic range and fine resolution in position. This is made possible by a careful assessment of the conditions of stability through an Allan-based deviation analysis. The capacity to measure femtonewton forces is important in the context of optical spin-orbit interactions and chiral forces.

Action in the Dark

This is nor the last trendy horror movie, neither the latest Star Wars episode but just another reaction about our Science paper, now online in the asap section of ACS Central Science. It has been written by Stéphane Kéna-Cohen and Joel Yuen-Zhou and it is entitled Polariton Chemistry : Action in the Dark. The paper is open access (published under ACS Author Choice license) and you can download it here.

Source : ACS Central Science

Our Science paper is out !

We are very pleased to announce that our paper previously on ChemrXiv , and resulting from our collaboration with Joseph Moran’s group, has now been published on Science website. We studied the deprotection of a silane derivative bearing two possible silyl bond cleavage sites—Si–C and Si–O respectively, to show that it is possible, thanks to the strong coupling of the vibrational mode associated to one of them, to favor the cleavage of one bond versus the other, and thus the formation of one product of the reaction versus the other. The examination of the thermodynamic parameters reveal the modification of the chemical landscape of the reaction under strong coupling. This brand new approach offers an alternative way to control chemical reactivity without catalysts, prefunctionalization, or chemical changes to the reaction conditions.

Winter publication

The collaboration with IPCMS on TMDs continues to be fruitful and after the recipe for a chiraliton, here is the one for a sandwich of 2D materials, also called van der Waals heterostructure, preserving valley polarization and coherence. No need for an oven, everything is done at room temperature ! More details in the publication, that will appear asap in ACS Photonics.

 

FRET or Lasing ?

A new publication, resulting from a collaboration between our group and japanese colleagues has just been accepted in Nanoletters. Microcrystals of COPV’s (carbon-bridged oligo-phenylenevinylenes) have been prepared, with donor and acceptor characters, and used as optical resonators. Depending on the laser pumping intensity, either FRET or lasing was measured, with a control of the lasing wavelength through the doping level of the acceptor. This is a step towards the realization of organic solid FRET lasers with microcrystalline resonators. You will find the paper in the publications page.

Chiral trapping in PRL

A new publication resulting from a collaboration between our group and David Norris and Lisa Poulikakos, from OMEL group at ETH Zürich has just been accepted in Physical Review Letters. It demonstrates the trapping of single chiral nanoparticles and their in situ recognition via polarimetry measurements. You can find the as soon as publishable version in our publications page.

 

Spying chirality nucleation

A new paper from our group has just been accepted for publication in Journal of Physical Chemistry C, nicely combining physics and chemistry. Indeed, using a Mueller polarimetry optical setup, we were able to monitor the different stages of the self-assembly of an achiral cyanine molecule into supramolecular chiral aggregates. You will find the just accepted version on the publications page.