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Self-hybridization within non-Hermitian localized plasmonic systems

Figure 1 : Left : Energy variation of two modes of silver nano-daggers as a function of the vertical arm length L. A clear anti-

In a recent paper published in Nature Physics, we show that electron energy loss spectroscopy in a scanning transmission electron microscope reveals the possibility for two eigenmodes from the same nanoparticle to hybridize – a physical effect that cannot be observed in day-to-day (Hermitian) linear physics Read more »

Probing Plasmon-NV0 Coupling at the Nanometer Scale with Photons and Fast Electrons

NV - Ag nanocube coupling

The local density of optical states governs an emitters’ lifetime and quantum yield through the Purcell effect. It can be modified by a surface plasmon electromagnetic field, but such a field has a spatial extension limited to a few hundreds of nanometers, complicating the use of optical methods to spatially probe emitter–plasmon coupling. Here we show that a combination of electron-based imaging, spectroscopies, and photon-based correlation spectroscopy enables measurement of the Purcell effect with nanometer and nanosecond spatiotemporal resolutions. Due to the large variability of radiative lifetimes of emitters in nanoparticles we relied on a statistical approach to probe the coupling between nitrogen-vacancy centers in nanodiamonds and surface plasmons in silver nanocubes. We quantified the Purcell effect by measuring the nitrogen-vacancy excited state lifetimes in a large number of either isolated nanodiamonds or nanodiamond-nanocube dimers and demonstrated a significant lifetime reduction for dimers.

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Talebi, N., Guo, S., Campos, A., Kociak, M. & van Aken, P.A. Toroidal Moments Probed by Electron Beams. Journal of Physics: Conference Series 14612052, 012174 (2020).
de Seauve, V., et al. Spectroscopies and electron microscopies unravel the origin of the first colour photographs. Angewandte Chemie International Edition (2020).doi:10.1002/anie.202001241
Yankovich, A.B., et al. Visualizing spatial variations of plasmon-exciton polaritons at the nanoscale using electron microscopy. Nano Letters (2019).doi:10.1021/acs.nanolett.9b03534
Guo, S., et al. Far-Field Radiation of Three-Dimensional Plasmonic Gold Tapers near Apexes. ACS Photonics 6, 2509 - 2516 (2019). Download: acsphotonics.9b00838(1).pdf (3.82 MB)
Faye, D.N., et al. Incorporation of Europium Into GaN Nanowires by Ion Implantation. The Journal of Physical Chemistry C (2019).doi:10.1021/acs.jpcc.8b12014
Guo, S., Talebi, N., Campos, A., Kociak, M. & van Aken, P.A. Radiation of Dynamic Toroidal Moments. ACS Photonics 6, 467 - 474 (2019).
Tizei, L.H.G., et al. Monolayer and thin h –BN as substrates for electron spectro-microscopy analysis of plasmonic nanoparticles. Applied Physics Letters 113122, 231108 (2018). Download: PlamonsOnhBN_APL_2018 .pdf (1.13 MB)
Lourenço-Martins, H., Das, P., Tizei, L.H.G., Weil, R. & Kociak, M. Self-hybridization within non-Hermitian localized plasmonic systems. Nature Physics 89, (2018). Download: LM2018.pdf (3.41 MB)
Schmidt, F.-P., et al. How Dark Are Radial Breathing Modes in Plasmonic Nanodisks?. ACS Photonics (2017).doi:10.1021/acsphotonics.7b01060 Download: acsphotonics.7b01060(1).pdf (2.15 MB)
Tizei, L.H.G. & Kociak, M. Advances in Imaging and Electron PhysicsQuantum Nanooptics in the Electron Microscope. (2017).doi:10.1016/bs.aiep.2017.01.002 Download: Tizei_Kociak_AIE.pdf (3.49 MB)
Kociak, M. & Zagonel, L.F. Cathodoluminescence in the scanning transmission electron microscope. Ultramicroscopy 176, 112-131 (2017). Download: STEMCL_8.pdf (2.43 MB)
Bourrellier, R., et al. Bright UV Single Photon Emission at Point Defects in h -BN. Nano Letters 16, 4317 (2016).
Meuret, S., et al. Lifetime Measurements Well below the Optical Diffraction Limit. ACS Photonics (2016).doi:10.1021/acsphotonics.6b00212 Download: ph500141j.pdf (7.44 MB)
Tararan, A., Zobelli, A., Benito, A.M., Maser, W.K. & Stéphan, O. Revisiting Graphene Oxide Chemistry via Spatially-Resolved Electron Energy Loss Spectroscopy. Chemistry of Materials 28, 3741 (2016).
Inan Akmehmet, G., et al. Structure and Luminescence in Long Persistence Eu, Dy, and B Codoped Strontium Aluminate Phosphors: The Boron Effect. Journal of the American Ceramic Society n/a - n/a (2016).doi:10.1111/jace.14188 Download: Akmehmet_et_al-2016-Journal_of_the_American_Ceramic_Society.pdf (505.64 KB)
Losquin, A. & Kociak, M. Link between Cathodoluminescence and Electron Energy Loss Spectroscopy and the radiative and full ElectroMagnetic Local Density of States. ACS Photonics 151006180224009 (2015).doi:10.1021/acsphotonics.5b00416 Download: acsphotonics.5b00416.pdf (1.71 MB)
Meuret, S., et al. Photon Bunching in Cathodoluminescence. Physical Review Letters 114, (2015). Download: PhysRevLett.114.197401.pdf (1.03 MB)
Tizei, L.H.G., et al. A polarity-driven nanometric luminescence asymmetry in AlN/GaN heterostructures. Applied Physics Letters 105, 143106 (2014). Download: Tizei_GaNQWCLAsymmetry_APL_2014.pdf (1.74 MB)
Bourrellier, R., et al. Nanometric Resolved Luminescence in h-BN Flakes: Excitons and Stacking Order. ACS Photonics 1, (2014). Download: bourrellier-acs-photonics.pdf (7.37 MB)
Kociak, M., et al. Seeing and measuring in colours: Electron microscopy and spectroscopies applied to nano-optics. Comptes Rendus Physique 15, 158 - 175 (2014). Download: 1-s2.0-S1631070513001515-main.pdf (2.66 MB)
Tizei, L.H.G., et al. Spatial modulation of above-the-gap cathodoluminescence in InP nanowires. Journal of Physics: Condensed Matter 25, 505303 (2013). Download: Tizei2013_2.pdf (613.65 KB)
Mahfoud, Z., et al. Cathodoluminescence in a Scanning Transmission Electron Microscope: A Nanometer-Scale Counterpart of Photoluminescence for the Study of II–VI Quantum Dots. The Journal of Physical Chemistry Letters 4090 - 4094 (2013).doi:10.1021/jz402233x Download: Mahfoud2013.pdf (2.4 MB)
Pierret, A., et al. Structural and optical properties of Al x Ga 1- x N nanowires. physica status solidi (RRL) - Rapid Research Letters n/a - n/a (2013).doi:10.1002/pssr.201308009
Pierret, A., Bougerol, C., Gayral, B., Kociak, M. & Daudin, B. Probing alloy composition gradient and nanometer-scale carrier localization in single AlGaN nanowires by nanocathodoluminescence. Nanotechnology 24, 305703 (2013).
Mignot, A., et al. A Top-Down Synthesis Route to Ultrasmall Multifunctional Gd-Based Silica Nanoparticles for Theranostic Applications. Chemistry - A European Journal n/a - n/a (2013).doi:10.1002/chem.201203003 Download: Mignot_Chemistry13_NPs-SiGd.pdf (2.51 MB)
Tizei, L.H.G. & Kociak, M. Spatially Resolved Quantum Nano-Optics of Single Photons Using an Electron Microscope. Physical Review Letters 110, (2013). Download: TizeiPRL2013.pdf (2.37 MB)
Zagonel, L.F., et al. Visualizing highly localized luminescence in GaN/AlN heterostructures in nanowires. Nanotechnology 23, 455205 (2012). Download: Zagonel_Nanotech.pdf (1.21 MB)
Deboudt, K., Gloter, A., Mussi, A. & Flament, P. Red-ox speciation and mixing state of iron in individual African dust particles. Journal of Geophysical Research 117, (2012).
Rodríguez-González, B., et al. Surface Plasmon Mapping of Dumbbell-Shaped Gold Nanorods: The Effect of Silver Coating. Langmuir 120410144721001 (2012).doi:10.1021/la300269n Download: la300269n.pdf (4.19 MB)
Tourbot, G., et al. Growth mechanism and properties of InGaN insertions in GaN nanowires. Nanotechnology 23, 135703 (2012). Download: Nanotechnology 2012 Tourbot.pdf (802.75 KB)
Mazzucco, S., et al. Ultralocal Modification of Surface Plasmons Properties in Silver Nanocubes. Nano Letters 120202105244000 (2012).doi:10.1021/nl2037672 Download: Nano Lett. 2012 Mazzucco.pdf (3.49 MB)
Kociak, M. & de Abajo, F.J.G. Nanoscale mapping of plasmons, photons, and excitons. MRS Bulletin 37, 39 - 46 (2012). Download: MRS Bull. 2012 Kociak-1.pdf (1.01 MB)
Mazzucco, S., et al. Spatially resolved measurements of plasmonic eigenstates in complex-shaped, asymmetric nanoparticles: gold nanostars. The European Physical Journal Applied Physics 54, 33512 (2011). Download: Eur. Phys. J. Appl. Phys. 2011 Mazzucco.pdf (3 MB)
Susi, T., et al. Nitrogen-Doped Single-Walled Carbon Nanotube Thin Films Exhibiting Anomalous Sheet Resistances. Chemistry Of Materials 23, 2201–2208 (2011).
Boudarham, G., et al. Spectral Imaging of Individual Split-Ring Resonators. Physical Review Letters 105, 255501 (2010). Download: Phys. Rev. Lett. 2010 Boudarham.pdf (567.25 KB)
Nelayah, J., et al. Two-Dimensional Quasistatic Stationary Short Range Surface Plasmons in Flat Nanoprisms. Nano Letters 10, 902–907 (2010). Download: Nano Lett. 2010 Nelayah.pdf (2.58 MB)
van Schooneveld, M.M., et al. Imaging and quantifying the morphology of an organic-inorganic nanoparticle at the sub-nanometre level. Nature Nanotechnology 5, 538–544 (2010).
Zobelli, A., Gloter, A., Ewels, C.P. & Colliex, C. Shaping single walled nanotubes with an electron beam. Physical Review B 77, 045410 (2008). Download: PhysRevB.77.045410.pdf (1.13 MB)
Nelayah, J., et al. Mapping surface plasmons on a single metallic nanoparticle. Nature Physics 3, 348–353 (2007). Download: Nat Phys 2007 Nelayah.pdf (676.34 KB)
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