The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform

Elizabeth Boer-duchemin - One of the best experts on this subject based on the ideXlab platform.

  • Revealing the spectral response of a plasmonic lens using low-energy electrons
    Physical Review B, 2017
    Co-Authors: Shuiyan Cao, Eric Le Moal, Gérald Dujardin, Florian Bigourdan, Jean-paul Hugonin, Jean-jacques Greffet, Aurélien Drezet, Serge Huant, Elizabeth Boer-duchemin
    Abstract:

    Plasmonic lenses, even of simple design, may have intricate spectral behavior. The spectral response of a plasmonic lens to a local, broadband excitation has rarely been studied despite its central importance in future applications. Here we use the unique combination of scanning tunneling microscopy (STM) and angle-resolved optical spectroscopy to probe the spectral response of a plasmonic lens. Such a lens consists of a series of concentric circular slits etched in a thick gold film. Spectrally broad, circular surface plasmon polariton (SPP) waves are electrically launched from the STM tip at the plasmonic lens center, and these waves scatter at the slits into a narrow, out-of-plane, Light beam. We show that the angular distribution of the Emitted Light results from the interplay of the size of the plasmonic lens and the spectral width of the SPP nanosource. We then propose simple design rules for optimized Light beaming with the smallest possible footprint. The spectral distribution of the Emitted Light depends not only on the SPP nanosource, but on the local density of electromagnetic states (EM-LDOS) at the nanosource position, which in turn depends on the cavity modes of the plasmonic microstructure. The key parameters for tailoring the spectral response of the plasmonic lens are the period of the slits forming the lens, the number of slits, and the lens inner diameter.

  • Engineering the emission of Light from a scanning tunneling microscope using the plasmonic modes of a nanoparticle
    Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2016
    Co-Authors: Eric Le Moal, Sylvie Marguet, Benoît Rogez, Elizabeth Boer-duchemin, Gérald Dujardin, Damien Canneson, Tatiana Teperik, Dana-codruta Marinica, Andrey Borissov
    Abstract:

    The inelastic tunnel current in the junction formed between the tip of a scanning tunneling microscope (STM) and the sample can electrically generate optical signals. This phenomenon is potentially of great importance for nano-optoelectronic devices. In practice, however, the properties of the Emitted Light are difficult to control because of the strong influence of the STM tip. In this work, we show both theoretically and experimentally that the sought-after, well-controlled emission of Light from an STM tunnel junction may be achieved using a nonplasmonic STM tip and a plasmonic nanoparticle on a transparent substrate. We demonstrate that the native plasmon modes of the nanoparticle may be used to engineer the Light Emitted in the substrate. Both the angular distribution and intensity of the Emitted Light may be varied in a predictable way by choosing the excitation position of the STM tip on the particle.

  • An Electrically Excited Nanoscale Light Source with Active Angular Control of the Emitted Light
    Nano letters, 2013
    Co-Authors: Eric Le Moal, Sylvie Marguet, Benoît Rogez, Samik Mukherjee, Philippe Dos Santos, Elizabeth Boer-duchemin, Geneviève Comtet, Gérald Dujardin
    Abstract:

    We report on the angular distribution, polarization, and spectrum of the Light Emitted from an electrically controlled nanoscale Light source. This nanosource of Light arises from the local, low-energy, electrical excitation of localized surface plasmons (LSP) on individual gold nanoparticles using a scanning tunneling microscope (STM). The gold nanoparticles (NP) are chemically synthesized truncated bitetrahedrons. The Emitted Light is collected through the transparent substrate and the emission characteristics (angular distribution, polarization, and spectrum) are analyzed. These three observables are found to strongly depend on the lateral position of the STM tip with respect to the triangular upper face of the gold NP. In particular, the resulting Light emission changes orientation when the electrical excitation via the STM tip is moved from the base to the vertex of the triangular face. On the basis of the comparison of the experimental observations with an analytical dipole model and finite-difference time-domain (FDTD) calculations, we show that this behavior is linked to the selective excitation of the out-of-plane and in-plane dipolar LSP modes of the NP. This selective excitation is achieved through the lateral position of the tip with respect to the symmetry center of the NP.

Eric Le Moal - One of the best experts on this subject based on the ideXlab platform.

  • Revealing the spectral response of a plasmonic lens using low-energy electrons
    Physical Review B, 2017
    Co-Authors: Shuiyan Cao, Eric Le Moal, Gérald Dujardin, Florian Bigourdan, Jean-paul Hugonin, Jean-jacques Greffet, Aurélien Drezet, Serge Huant, Elizabeth Boer-duchemin
    Abstract:

    Plasmonic lenses, even of simple design, may have intricate spectral behavior. The spectral response of a plasmonic lens to a local, broadband excitation has rarely been studied despite its central importance in future applications. Here we use the unique combination of scanning tunneling microscopy (STM) and angle-resolved optical spectroscopy to probe the spectral response of a plasmonic lens. Such a lens consists of a series of concentric circular slits etched in a thick gold film. Spectrally broad, circular surface plasmon polariton (SPP) waves are electrically launched from the STM tip at the plasmonic lens center, and these waves scatter at the slits into a narrow, out-of-plane, Light beam. We show that the angular distribution of the Emitted Light results from the interplay of the size of the plasmonic lens and the spectral width of the SPP nanosource. We then propose simple design rules for optimized Light beaming with the smallest possible footprint. The spectral distribution of the Emitted Light depends not only on the SPP nanosource, but on the local density of electromagnetic states (EM-LDOS) at the nanosource position, which in turn depends on the cavity modes of the plasmonic microstructure. The key parameters for tailoring the spectral response of the plasmonic lens are the period of the slits forming the lens, the number of slits, and the lens inner diameter.

  • Engineering the emission of Light from a scanning tunneling microscope using the plasmonic modes of a nanoparticle
    Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2016
    Co-Authors: Eric Le Moal, Sylvie Marguet, Benoît Rogez, Elizabeth Boer-duchemin, Gérald Dujardin, Damien Canneson, Tatiana Teperik, Dana-codruta Marinica, Andrey Borissov
    Abstract:

    The inelastic tunnel current in the junction formed between the tip of a scanning tunneling microscope (STM) and the sample can electrically generate optical signals. This phenomenon is potentially of great importance for nano-optoelectronic devices. In practice, however, the properties of the Emitted Light are difficult to control because of the strong influence of the STM tip. In this work, we show both theoretically and experimentally that the sought-after, well-controlled emission of Light from an STM tunnel junction may be achieved using a nonplasmonic STM tip and a plasmonic nanoparticle on a transparent substrate. We demonstrate that the native plasmon modes of the nanoparticle may be used to engineer the Light Emitted in the substrate. Both the angular distribution and intensity of the Emitted Light may be varied in a predictable way by choosing the excitation position of the STM tip on the particle.

  • An Electrically Excited Nanoscale Light Source with Active Angular Control of the Emitted Light
    Nano letters, 2013
    Co-Authors: Eric Le Moal, Sylvie Marguet, Benoît Rogez, Samik Mukherjee, Philippe Dos Santos, Elizabeth Boer-duchemin, Geneviève Comtet, Gérald Dujardin
    Abstract:

    We report on the angular distribution, polarization, and spectrum of the Light Emitted from an electrically controlled nanoscale Light source. This nanosource of Light arises from the local, low-energy, electrical excitation of localized surface plasmons (LSP) on individual gold nanoparticles using a scanning tunneling microscope (STM). The gold nanoparticles (NP) are chemically synthesized truncated bitetrahedrons. The Emitted Light is collected through the transparent substrate and the emission characteristics (angular distribution, polarization, and spectrum) are analyzed. These three observables are found to strongly depend on the lateral position of the STM tip with respect to the triangular upper face of the gold NP. In particular, the resulting Light emission changes orientation when the electrical excitation via the STM tip is moved from the base to the vertex of the triangular face. On the basis of the comparison of the experimental observations with an analytical dipole model and finite-difference time-domain (FDTD) calculations, we show that this behavior is linked to the selective excitation of the out-of-plane and in-plane dipolar LSP modes of the NP. This selective excitation is achieved through the lateral position of the tip with respect to the symmetry center of the NP.

Gérald Dujardin - One of the best experts on this subject based on the ideXlab platform.

  • Revealing the spectral response of a plasmonic lens using low-energy electrons
    Physical Review B, 2017
    Co-Authors: Shuiyan Cao, Eric Le Moal, Gérald Dujardin, Florian Bigourdan, Jean-paul Hugonin, Jean-jacques Greffet, Aurélien Drezet, Serge Huant, Elizabeth Boer-duchemin
    Abstract:

    Plasmonic lenses, even of simple design, may have intricate spectral behavior. The spectral response of a plasmonic lens to a local, broadband excitation has rarely been studied despite its central importance in future applications. Here we use the unique combination of scanning tunneling microscopy (STM) and angle-resolved optical spectroscopy to probe the spectral response of a plasmonic lens. Such a lens consists of a series of concentric circular slits etched in a thick gold film. Spectrally broad, circular surface plasmon polariton (SPP) waves are electrically launched from the STM tip at the plasmonic lens center, and these waves scatter at the slits into a narrow, out-of-plane, Light beam. We show that the angular distribution of the Emitted Light results from the interplay of the size of the plasmonic lens and the spectral width of the SPP nanosource. We then propose simple design rules for optimized Light beaming with the smallest possible footprint. The spectral distribution of the Emitted Light depends not only on the SPP nanosource, but on the local density of electromagnetic states (EM-LDOS) at the nanosource position, which in turn depends on the cavity modes of the plasmonic microstructure. The key parameters for tailoring the spectral response of the plasmonic lens are the period of the slits forming the lens, the number of slits, and the lens inner diameter.

  • Engineering the emission of Light from a scanning tunneling microscope using the plasmonic modes of a nanoparticle
    Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2016
    Co-Authors: Eric Le Moal, Sylvie Marguet, Benoît Rogez, Elizabeth Boer-duchemin, Gérald Dujardin, Damien Canneson, Tatiana Teperik, Dana-codruta Marinica, Andrey Borissov
    Abstract:

    The inelastic tunnel current in the junction formed between the tip of a scanning tunneling microscope (STM) and the sample can electrically generate optical signals. This phenomenon is potentially of great importance for nano-optoelectronic devices. In practice, however, the properties of the Emitted Light are difficult to control because of the strong influence of the STM tip. In this work, we show both theoretically and experimentally that the sought-after, well-controlled emission of Light from an STM tunnel junction may be achieved using a nonplasmonic STM tip and a plasmonic nanoparticle on a transparent substrate. We demonstrate that the native plasmon modes of the nanoparticle may be used to engineer the Light Emitted in the substrate. Both the angular distribution and intensity of the Emitted Light may be varied in a predictable way by choosing the excitation position of the STM tip on the particle.

  • An Electrically Excited Nanoscale Light Source with Active Angular Control of the Emitted Light
    Nano letters, 2013
    Co-Authors: Eric Le Moal, Sylvie Marguet, Benoît Rogez, Samik Mukherjee, Philippe Dos Santos, Elizabeth Boer-duchemin, Geneviève Comtet, Gérald Dujardin
    Abstract:

    We report on the angular distribution, polarization, and spectrum of the Light Emitted from an electrically controlled nanoscale Light source. This nanosource of Light arises from the local, low-energy, electrical excitation of localized surface plasmons (LSP) on individual gold nanoparticles using a scanning tunneling microscope (STM). The gold nanoparticles (NP) are chemically synthesized truncated bitetrahedrons. The Emitted Light is collected through the transparent substrate and the emission characteristics (angular distribution, polarization, and spectrum) are analyzed. These three observables are found to strongly depend on the lateral position of the STM tip with respect to the triangular upper face of the gold NP. In particular, the resulting Light emission changes orientation when the electrical excitation via the STM tip is moved from the base to the vertex of the triangular face. On the basis of the comparison of the experimental observations with an analytical dipole model and finite-difference time-domain (FDTD) calculations, we show that this behavior is linked to the selective excitation of the out-of-plane and in-plane dipolar LSP modes of the NP. This selective excitation is achieved through the lateral position of the tip with respect to the symmetry center of the NP.

Thomas J. Matula - One of the best experts on this subject based on the ideXlab platform.

  • Single-bubble sonoluminescence in microgravity
    Ultrasonics, 2000
    Co-Authors: Thomas J. Matula
    Abstract:

    Single-bubble sonoluminescence refers to the emission of Light from an acoustically trapped bubble undergoing highly nonlinear, presumably radial oscillations. The intensity of the Emitted Light depends strongly on the forcing pressure, and is limited by the development of instabilities that ultimately results in the extinction of the bubble. In this article, we discuss a possible contributing factor for the generation of instabilities; specifically, we examine the effect of the gravitational force on a sonoluminescence bubble.

L Martinmoreno - One of the best experts on this subject based on the ideXlab platform.

  • scattering of surface plasmons by one dimensional periodic nanoindented surfaces
    Physical Review B, 2005
    Co-Authors: F Lopeztejeira, F J Garciavidal, L Martinmoreno
    Abstract:

    In this work, the scattering of surface plasmons by a finite periodic array of one-dimensional grooves is theoretically analyzed by means of a modal expansion technique. We have found that the geometrical parameters of the array can be properly tuned to achieve optimal performance of the structure either as a Bragg reflector or as a converter of surface plasmons into Light. In this last case, the Emitted Light is collimated within a few degrees cone. Importantly, we also show that a small number of indentations in the array are sufficient to fully achieve its functional capabilities.