Accueil > Séminaires > Année 2023
Année 2023
Séminaire de Robin Corgier (19 déc)
Classical and Quantum state engineering for precision measurements
Matter-wave interferometry allows precision measurements by mapping the physical quantity of interest to a phase shift determined using interferometric techniques. In the past years, atomic interferometers have been widely used for fundamental physics tests. To name a few, they have allowed to measure the fine structure constant, the gravitational constant, topological phases and atomic properties. In addition, they are (…)
Séminaire d’INTERET GENERAL de Matteo Cacciari (12 déc)
Partage des données de la recherche : enjeux, politiques et outils
Le partage des données dans le domaine de la recherche prend une importance grandissante et promet l’amélioration de la transparence, l’augmentation de la collaboration et l’accélération des découvertes scientifiques. La généralisation de cette pratique étant relativement récente, les politiques, les pratiques et les outils sont encore en train de se développer et consolider, et peuvent varier considérablement d’une (…)
Séminaire de Philippe-Henri Secrétan et Bernard Do (15 nov)
In vitro chemical stability profile and ex vivo fate of a new topically applied drug studied by mass spectrometry
Understanding the intrinsic stability profile, especially with respect to light exposure, and the ex vivo fate of new active substances intended for topical or local use is vital in designing stable and efficient new drugs. On the one hand, light exposure is a crucial factor to assess, as the skin is routinely exposed to light, making it essential to understand how it (…)
Séminaire d’An Tran (28 nov)
Demonstration of time scales steered by NPL and OP’s optical atomic clocks
In this talk, we first introduce the research activities within the Optical Frequency Metrology group at the National Physical Laboratory (NPL), including the development and operation of state-of-the-art optical atomic clocks ; optical frequency comparison and dissemination techniques ; and trace gas detection. We then present the application of optical atomic clocks at NPL and the Observatoire de Paris (OP) to (…)
Séminaire de Sotirios Papadopoulos (14 nov)
Exciton-assisted tunneling in van der Waals heterostructures
Transition metal dichalcogenides (TMDs) are semiconductors that have attracted attention due to their interesting electronic and optical properties. By combining TMDs with conductors (i.e. graphene) and insulators (i.e. hexagonal boron nitride - hBN) we can fabricate electrically-controlled light-emitting tunnel junctions. In this talk, I will discuss the various inelastic tunneling processes present in van der Waals tunnel (…)
Séminaire de Dennis Tokaryk (10 nov)
The iron hydride molecule, FeH : new spectroscopy and new astrophysical implications
Despite its simple structure, FeH has a very complex spectrum. The complexity is due to the high spin and orbital angular momentum of most of its electronic states, which leads to a high density of states overall. Understanding the FeH spectrum is of great importance, since it is present in the atmospheres of cooler stars, and in the atmosphere above sunspots on our sun. FeH is also used as a sensitive (…)
Séminaire de Lucile Rutkowski (7 nov)
Optical frequency comb absorption spectroscopy for laboratory astrophysics
Laboratory data is necessary to interpret observations from Earth and space telescopes, and to validate the chemical network models of the interstellar medium and planetary atmospheres. In particular, spectroscopic data about the many molecular species involved in the various extraterrestrial environments (ranging from the interstellar medium to exoplanetary atmospheres) is required to interpret observations. In (…)
Séminaire de Miriam Kappe (17 oct)
Messenger Spectroscopy using Superfluid Helium Nanodroplets
Recording absorption spectra of cold ions in the gas phase is a challenging task. It can be tackled by messenger spectroscopy using helium atoms as weakly interacting tags. In our group we are able to produce helium tagged cations as well as anions by charging and subsequently doping large helium nanodroplets. Ions are released from the large droplets either via surface collision1 or by evaporation of the droplets through (…)
Séminaire de Kazuki Sumida (4 oct)
Laser-based angle-resolved photoemission spectroscopy on topological insulators
Unveiling the electronic structure in solids is important because it is closely related not only to exotic quantum properties of condensed matter but also to numerous functionalities associated with device applications. Angle-resolved photoemission spectroscopy (ARPES) has been widely recognized as one of the leading experimental probes due to its energy and momentum resolution capability. Over the past few (…)
Séminaire de Taichi Okuda (2 oct)
Peculiar spin texture of Bi(110) observed by ESPRESSO machine
Bismuth is one of the prototypical materials showing clear spin-polarization by spin-orbit interaction. Especially Bi(111) surface has been investigated extensively as a demonstrative Rashba spin-split system and the characteristic spin texture including out-of-plane spin components caused by the higher order Rashba Hamiltonian has been unveiled [1,2] Compared with Bi(111) surface, Bi(110) surface had not got much attention (…)
Séminaire de Freek Massee (28 mars)
Le séminaire aura lieu dans l’amphi du bât 520 et sera également diffusé en visioconférence. Les personnes extérieures au laboratoire qui souhaitent disposer du lien sont invitées à envoyer un mail à l’adresse rouge]
seminaires.ismo@universite-paris-saclay.fr
Elles recevront le lien pour se connecter en retour.rouge]
Dynamics at the atomic scale in quantum matter
Dopants and impurities are crucial in shaping the ground-state of host materials : semiconducting technology is based (…)
Séminaire FFJ : Sarah Abrahamsson (21 mars)
Le séminaire aura lieu dans l’amphi du bât 520 et sera également diffusé en visioconférence. Les personnes extérieures au laboratoire qui souhaitent disposer du lien sont invitées à envoyer un mail à l’adresse rouge]
seminaires.ismo@universite-paris-saclay.fr
Elles recevront le lien pour se connecter en retour.rouge]
Deep volume 3D imaging with a 25-camera array multifocus microscope
The conflict between the three-dimensional nature of the world and the two-dimensionality of the (…)
Séminaire de Thomas Pons (14 février)
Le séminaire aura lieu dans l’amphi du bât 520 et sera également diffusé en visioconférence. Les personnes extérieures au laboratoire qui souhaitent disposer du lien sont invitées à envoyer un mail à l’adresse rouge]
seminaires.ismo@universite-paris-saclay.fr
Elles recevront le lien pour se connecter en retour.rouge]
Zwitterion-coated inorganic nanocrystals for biological applications
Inorganic nanocrystals such as gold, iron oxide and semiconductor nanocrystals have unique (…)
Séminaire de Raphaël Hahn (30 janvier)
Le séminaire aura lieu dans l’amphi du bât 520 et sera également diffusé en visioconférence. Les personnes extérieures au laboratoire qui souhaitent disposer du lien sont invitées à envoyer un mail à l’adresse rouge]
seminaires.ismo@universite-paris-saclay.fr
Elles recevront le lien pour se connecter en retour.rouge]
Rydberg states of atoms and molecules as a toolbox for charged particle sources, cold chemistry and surface science
Rydberg states of atoms and molecules (with (…)
Séminaire de Benoît Darquié (24 janvier)
Le séminaire aura lieu dans l’amphi du bât 520 et sera également diffusé en visioconférence. Les personnes extérieures au laboratoire qui souhaitent disposer du lien sont invitées à envoyer un mail à l’adresse rouge]
seminaires.ismo@universite-paris-saclay.fr
Elles recevront le lien pour se connecter en retour.rouge]
High-resolution mid-infrared molecular spectroscopy for precision measurements and tests of fundamental physics.
There is an increasing demand for precise molecular (…)
Séminaire d’Oliver S. Wenger (ANNULE)
Le séminaire aura lieu dans l’amphi du bât 520 et sera également diffusé en visioconférence. Les personnes extérieures au laboratoire qui souhaitent disposer du lien sont invitées à envoyer un mail à l’adresse rouge]
seminaires.ismo@universite-paris-saclay.fr
Elles recevront le lien pour se connecter en retour.rouge]
Photoredox mechanisms and photocatalyst development
This first half of this talk will concentrate on the application of transient UV-Vis absorption spectroscopy to (…)
Séminaire d’Alexandra Fragola (10 janvier)
Le séminaire aura lieu dans l’amphi du bât 520 et sera également diffusé en visioconférence. Les personnes extérieures au laboratoire qui souhaitent disposer du lien sont invitées à envoyer un mail à l’adresse rouge]
seminaires.ismo@universite-paris-saclay.fr
Elles recevront le lien pour se connecter en retour.rouge]
Structured illumination and adaptive optics fluorescence microscopy for high resolution bio-imaging
Fluorescence microscopy is a technique of choice for dynamic (…)
Séminaire de Ralph Püttner (4 avril)
Le séminaire aura lieu dans l’amphi du bât 520 et sera également diffusé en visioconférence. Les personnes extérieures au laboratoire qui souhaitent disposer du lien sont invitées à envoyer un mail à l’adresse rouge]
seminaires.ismo@universite-paris-saclay.fr
Elles recevront le lien pour se connecter en retour.rouge]
Electron spectroscopy of isolated atoms and molecules using hard X-ray synchrotron radiation
The usage of hard X-ray synchrotron radiation (hν = 2 – 14 keV) is a (…)
Séminaire d’Audrey Scognamiglio
Ultrafast electronic relaxation of tetracene in the gas phase : the role of non-adiabatic couplings
Polyacenes are promising systems for application in organic photovoltaics, given their potential to produce multiple charge carriers from a single absorbed photon in a process known as singlet fission [1]. The ultrafast excitation dynamics of PAH following the absorption of a photon in the visible to the UV range provides a fundamental understanding of the underlying molecular energetics, (…)
Séminaire de Tatiana Itina (11 juillet à 14h)
Multi-scale modeling for laser-based nanotechnology
Nanoparticles have found numerous applications in various fields including medicine, solar energy and catalysis. In particular, bi-metallic, alloy, Janus and multi-component nanoparticles are particularly promising since they open a way of almost unlimited modifications of their absorption spectra, but also of their magneto-plasmonic or thermo-plasmonic properties. Among promising methods of nanoparticle synthesis, lasers-based methods (…)
Séminaire de P. Bryan Changala (12 septembre)
Le séminaire aura lieu dans l’amphi du bât 520 et sera également diffusé en visioconférence. Les personnes extérieures au laboratoire qui souhaitent disposer du lien sont invitées à envoyer un mail à l’adresse rouge]
seminaires.ismo@universite-paris-saclay.fr
Elles recevront le lien pour se connecter en retour.rouge]
Exotic molecules in the laboratory and space : Probing chemistry and electronic properties with high-resolution microwave spectroscopy
The key molecules that drive (…)
Séminaire d’Ingo Fischer (3 octobre)
Picosecond time-resolved photoionisation of PAH (polycyclic aromatic hydrocarbons) , PANH (nitrogen-containing PAH) and their dimers
Interest in the electronic structure, photochemistry and photophysics of polycyclic aromatic hydrocarbons (PAH) originates from their possible application as electron conductors in optoelectronic materials, but also from their observation in the interstellar medium. Recently, Nitrogen- and Boron-doped PAH moved into the focus, because replacement of a (…)