Tomáš Neuman

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The tailoring of electromagnetic near-field properties is the central task in the field of nanophotonics. In addition to 2D optics for optical nanocircuits, confined and enhanced electric fields are utilized in detection and sensing, photovoltaics, spatially localized spectroscopy (nanoimaging), as well as in nanolithography and nanomanipulation. For(More)
Plasmonic cavities are suitable platforms for studying the interaction of light and matter at the nanoscale. It has been demonstrated that plasmonic cavities are able to squeeze light into nanometer-sized volumes and thus open novel possibilities for studying the interaction of single molecules with light. For example, it has been recently shown that(More)
We perform far-field spectroscopy of infrared metal antennas on silicon oxide layers of different thickness, where we find a splitting of the plasmonic resonance. This splitting can result in a transparency window, corresponding to suppression of antenna scattering, respectively "cloaking" of the antenna. Backed up by theory, we show that this effect is(More)
Recent advances on Surface Enhanced Raman Scattering (SERS) have led to a delicate control of the coupling between extremely-confined plasmonic resonances supported by metallic structures and the vibrational states of molecules. As a consequence, experiments have started to emerge that cannot be easily explained using standard models based on the classical(More)
We introduce a Quantum Electrodynamics (QED) approach to describe inelastic scattering processes of molecules in atomic-scale plasmonic picocavities. By solving the corresponding optomechanical dynamics, we identify nonlinear inelastic signals related to vibrational pumping, together with dynamical backaction and strong correlations of the photons emitted.
Chiral antennas and metasurfaces can be designed to react differently to left- and right-handed circularly polarized light, which enables novel optical properties such as giant optical activity and negative refraction. Here, we demonstrate that the underlying chiral near-field distributions can be directly mapped with scattering-type scanning near-field(More)
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