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Optical gap and optically active intragap defects in cubic BN

Submitted by eels on Wed, 2018-09-19 15:51
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Studies on the optical properties of cubic BN are generally hindered by the very high density of crystal defects. Thus, the precise value of its optical gap is still debated, with large discrepancies between reported theoretical and experimental estimated values. In this study we addressed open questions of the cubic BN optics by employing high spatially resolved spectroscopy techniques to the highest-quality samples available and combining these observations with state-of-the-art quasiparticle calculations.

Phys. Rev. B 98, 094106 (2018)

Self-hybridization within non-Hermitian localized plasmonic systems

Submitted by mathieukociak on Mon, 2018-01-01 21:40
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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 »

Publications

Tararan, A., et al. Optical gap and optically active intragap defects in cubic BN. Physical Review B 982121, (2018). Download: PhysRevB.98.094106.pdf (2.16 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
Das, P., Lourenço-Martins, H., Tizei, L.H.G., Weil, R. & Kociak, M. Nanocross: A Highly Tunable Plasmonic System. The Journal of Physical Chemistry C 121, 16521 - 16527 (2017). Download: The Journal of Physical Chemistry C Volume issue 2017 [doi 10.1021%2Facs.jpcc_.7b05548] Das, Pabitra; Lourenço-Martins, Hugo; Tizei, Luiz Henrique Galv -- Nanocross- A Highly Tunable Plasmonic System.pdf (1.27 MB)
Campos, A., et al. Plasmonic Breathing and Edge Modes in Aluminum Nanotriangles. ACS Photonics (2017).doi:10.1021/acsphotonics.7b00204 Download: Campos2017.pdf (5.45 MB)
Guzzinati, G., et al. Probing the symmetry of the potential of localized surface plasmon resonances with phase-shaped electron beams. Nature Communications 14999 (2017).doi:10.1038/ncomms14999 Download: Nature Communications 2017 eacute.pdf (1.55 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)
Kawasaki, N., et al. Extinction and Scattering Properties of High-Order Surface Plasmon Modes in Silver Nanoparticles Probed by Combined Spatially Resolved Electron Energy Loss Spectroscopy and Cathodoluminescence. ACS Photonics (2016).doi:10.1021/acsphotonics.6b00257 Download: ACS Photonics 2016 Kawasaki.pdf (3.04 MB)
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)
Nagarajan, S., et al. Simultaneous cathodoluminescence and electron microscopy cytometry of cellular vesicles labeled with fluorescent nanodiamonds. Nanoscale (2016).doi:10.1039/c6nr01908k Download: c6nr01908k (1).pdf (1.46 MB)
Zagonel, L.F., et al. Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowires. Physical Review B 93, (2016). Download: PhysRevB.93.205410.pdf (2.26 MB)
Zhang, X., et al. InGaN nanowires with high InN molar fraction: growth, structural and optical properties. Nanotechnology 27, 195704 (2016). Download: nano_27_19_195704.pdf (2.66 MB)
Colliex, C., Kociak, M. & Stéphan, O. Electron Energy Loss Spectroscopy imaging of surface plasmons at the nanometer scale. Ultramicroscopy 162, A1 - A24 (2016). Download: Colliex2016.pdf (6.32 MB)
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: acsphotonics2E5b00416.pdf (1.76 MB)
Meuret, S., et al. Photon Bunching in Cathodoluminescence. Physical Review Letters 114, (2015). Download: PhysRevLett.114.197401.pdf (1.03 MB)
Pantzas, K., et al. Role of compositional fluctuations and their suppression on the strain and luminescence of InGaN alloys. Journal of Applied Physics 117, 055705 (2015).
Losquin, A., et al. Unveiling Nanometer Scale Extinction and Scattering Phenomena through Combined Electron Energy Loss Spectroscopy and Cathodoluminescence Measurements. Nano Letters 150120134914003 (2015).doi:10.1021/nl5043775 Download: Nano Lett. 2015 Losquin.pdf (2.86 MB)
Martin, J., et al. High-Resolution Imaging and Spectroscopy of Multipolar Plasmonic Resonances in Aluminum Nanoantennas. Nano Letters 14, 5517 - 5523 (2014). Download: Nano Lett. 2014 Martin.pdf (2.48 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)
Kociak, M. & Stéphan, O. Mapping plasmons at the nanometer scale in an electron microscope. Chemical Society Reviews (2014).doi:10.1039/c3cs60478k Download: Chem. Soc. Rev. 2014 Kociak.pdf (2.86 MB)
Losquin, A. Surface Plasmon modes revealed by fast electron based spectroscopies: from simple model to complex systems. (2013).
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)
Losquin, A., et al. Experimental evidence of nanometer-scale confinement of plasmonic eigenmodes responsible for hot spots in random metallic films. Physical Review B 88, (2013). Download: Losquin2013.pdf (7.27 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
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)
Myroshnychenko, V., et al. Plasmon Spectroscopy and Imaging of Individual Gold Nanodecahedra: A Combined Optical Microscopy, Cathodoluminescence, and Electron Energy-Loss Spectroscopy Study. Nano Letters 12, 4172 - 4180 (2012). Download: nl301742h.pdf (3.33 MB)
Boudarham, G. & Kociak, M. Modal decompositions of the local electromagnetic density of states and spatially resolved electron energy loss probability in terms of geometric modes. Physical Review B 85, (2012). Download: PhysRevB.85.245447.pdf (1.52 MB)
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)
Tizei, L.H.G. & Kociak, M. Spectrally and spatially resolved cathodoluminescence of nanodiamonds: local variations of the NV0 emission properties. Nanotechnology 23, 175702 (2012). Download: Nanotechnology 2012 Tizei-1.pdf (1.3 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)
Boudarham, G. Nanooptique avec des électrons rapides : métamatériaux, formulation modale de la EMLDOS pour des systèmes plasmoniques. (2011).at <http://tel.archives-ouvertes.fr/docs/00/62/44/71/PDF/These_Boudarham_Guillaume_2011.pdf>
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)
Jacopin, G., et al. Single-Wire Light-Emitting Diodes Based on GaN Wires Containing Both Polar and Nonpolar InGaN/GaN Quantum Wells. Applied Physics Express 5, 014101 (2011). Download: Appl. Phys. Express 2011 Jacopin.pdf (836.15 KB)
Zagonel, L.F., et al. Nanometer Scale Spectral Imaging of Quantum Emitters in Nanowires and Its Correlation to Their Atomically Resolved Structure. Nano Letters 11, 568–573 (2011). Download: Nano Lett. 2011 Zagonel.pdf (4.51 MB)
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)
de Abajo, F.J.G., Asenjo-Garcia, A. & Kociak, M. Multiphoton Absorption and Emission by Interaction of Swift Electrons with Evanescent Light Fields. Nano Letters 10, 1859–1863 (2010).
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)
Arenal, R., et al. Optical gap measurements on individual boron nitride nanotubes by electron energy loss spectroscopy. Microscopy And Microanalysis 14, 274–282 (2008).
de Abajo, F.J.G. & Kociak, M. Probing the Photonic Local Density of States with Electron Energy Loss Spectroscopy. Physical Review Letters 100, 106804 (2008). Download: Phys. Rev. Lett. 2008 García de Abajo.pdf (540.82 KB)
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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