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Engineering the emission of light from a scanning tunneling microscope using the plasmonic modes of a nanoparticle

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.
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Submitted on : Monday, January 18, 2016 - 8:58:41 AM
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Eric Le Moal, Sylvie Marguet, Damien Canneson, Benoît Rogez, Elizabeth Boer-Duchemin, et al.. 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, American Physical Society, 2016, 93, pp.035418. ⟨10.1103/PhysRevB.93.035418⟩. ⟨cea-01257655⟩

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