Publications associées à Spectroscopy of the electron states in self-organized GaN/AlN quantum dots

Giant two-photon absorption of anatase TiO2 in Au/TiO2 core-shell nanoparticles

Majed Chergui, Malte Oppermann, Lijie Wang

We report on deep-to-near-UV transient absorption spectra of core-shell Au/SiO2 and Au/TiO2 nanoparticles (NPs) excited at the surface plasmon resonance of the Au core, and of UV-excited bare anatase TiO2 NPs. The bleaching of the first excitonic transitio ...

CHINESE LASER PRESS2023

In-line electronic and structural characterization of reactively sputtered Cu-Co-Mn black spinel oxides

Andreas Schueler, Anna Krammer, Maxime Lagier

Cu-Co-Mn spinel oxide thin films are deposited by reactive magnetron sputtering. The x-ray diffraction (XRD) spectrum suggests a nanocrystalline spinel film when sputtered at approximate to 465 degrees C. In-line scanning tunneling microscopy confirms nano ...

A V S AMER INST PHYSICS2021

Integrated photonics enables continuous-beam electron phase modulation

Tobias Kippenberg, Rui Ning Wang, Guanhao Huang, Yujia Yang, Junqiu Liu, Arslan Sajid Raja

Integrated photonics facilitates extensive control over fundamental light-matter interactions in manifold quantum systems including atoms(1), trapped ions(2,3), quantum dots(4) and defect centres(5). Ultrafast electron microscopy has recently made free-ele ...

NATURE PORTFOLIO2021

Photo-induced environmental remediation, biomedical imaging, and microbial inactivation by Mn-doped semiconductors: critical issues

Juan Kiwi, Sami Rtimi

The Mn-doping/decoration of S-containing semiconductor quantum dots (QDs) determine their photochemical properties and are important in the field of artificial photosynthesis. The Mn-mediated charge-transfer kinetics and energetics in composites of the typ ...

ELSEVIER SCI LTD2021

Controlling free electrons with optical whispering-gallery modes

Tobias Kippenberg

Free-electron beams are versatile probes of microscopic structure and composition(1,2), and have revolutionized atomic-scale imaging in several fields, from solid-state physics to structural biology(3). Over the past decade, the manipulation and interactio ...

NATURE PUBLISHING GROUP2020

Electron Dynamics in Anatase TiO2 Nanoparticles by Ultrafast Broadband Deep-Ultraviolet Spectroscopy

Majed Chergui, Edoardo Baldini, Enrico Pomarico, Tania Palmieri

The optical bandgap of anatase TiO2 nanoparticles is dominated by bulk absorption bands in the deep-ultraviolet due to strongly bound excitons. These spectral features can be utilized as a sensitive probe of carrier and lattice dynamics inside the TiO2 nan ...

E D P SCIENCES2019

Enhanced Electron-Phonon Interaction in Multivalley Materials

Nicola Marzari, Marco Gibertini, Helmuth Berger, Thibault Daniel Pierre Sohier, Evgeniy Ponomarev

We report a combined experimental and theoretical investigation that reveals a new mechanism responsible for the enhancement of electron-phonon coupling in doped semiconductors in which multiple inequivalent valleys are simultaneously populated. Using Rama ...

AMER PHYSICAL SOC2019

Bimodal exciton-plasmon light sources controlled by local charge carrier injection

Klaus Kern, Anna Maria Roslawska, Christoph Grosse

Electrical charges can generate photon emission in nanoscale quantum systems by two independent mechanisms. First, radiative recombination of pairs of oppositely charged carriers generates sharp excitonic lines. Second, coupling between currents and collec ...

AMER ASSOC ADVANCEMENT SCIENCE2018

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Spectroscopy of the electron states in self-organized GaN/AlN quantum dots

In Situ and Time-Resolved Transmission Electron Microscopy of Nanoscale Processes

Giant two-photon absorption of anatase TiO2 in Au/TiO2 core-shell nanoparticles

In-line electronic and structural characterization of reactively sputtered Cu-Co-Mn black spinel oxides

Integrated photonics enables continuous-beam electron phase modulation

Photo-induced environmental remediation, biomedical imaging, and microbial inactivation by Mn-doped semiconductors: critical issues

Controlling free electrons with optical whispering-gallery modes

Electron Dynamics in Anatase TiO2 Nanoparticles by Ultrafast Broadband Deep-Ultraviolet Spectroscopy

Enhanced Electron-Phonon Interaction in Multivalley Materials

Bimodal exciton-plasmon light sources controlled by local charge carrier injection

Grain boundaries and quantum transport in monolayer MoS2

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Chattez avec Graph Search

In Situ and Time-Resolved Transmission Electron Microscopy of Nanoscale Processes

Controlling free electrons with optical whispering-gallery modes

Giant two-photon absorption of anatase TiO2 in Au/TiO2 core-shell nanoparticles

Integrated photonics enables continuous-beam electron phase modulation

Bimodal exciton-plasmon light sources controlled by local charge carrier injection

In-line electronic and structural characterization of reactively sputtered Cu-Co-Mn black spinel oxides

Photo-induced environmental remediation, biomedical imaging, and microbial inactivation by Mn-doped semiconductors: critical issues

Electron Dynamics in Anatase TiO2 Nanoparticles by Ultrafast Broadband Deep-Ultraviolet Spectroscopy

Enhanced Electron-Phonon Interaction in Multivalley Materials

Grain boundaries and quantum transport in monolayer MoS2