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In this Letter, we calculate the optical and magneto-optical reflectivity in a dielectric/gap/ferromagnet excited by a -polarized monochromatic optical beam through the prism (Otto configuration) as a function of the angle of incidence and the gap thickness . Besides the well-known surface plasmon polariton (SPP resonance at ∼ ), we find a new, to the best of our knowledge, resonance with a nanometric gap ∼ 10 nm at a large ∼ 80°. Both resonances display pronounced resonant behavior in the transverse magneto-optical Kerr effect (T-MOKE).
View Article and Find Full Text PDFMagneto-plasmonic "switch" device for magnetic field detection.
Nanophotonics
August 2024
Université Jean Monnet Saint Etienne, CNRS, Institut d'optique Graduate School, Laboratoire Hubert Curien UMR 5516, F-42023 Saint-Etienne, France.
Article Synopsis
- - The paper presents a new type of low-cost optical structure designed for detecting magnetic fields, using an innovative magneto-plasmonic device for optical switching.
- - It features a unique setup with a 1D gold grating and a cobalt layer that enhances the switching effect, influenced by transverse magnetic fields.
- - The design allows for differential measurements between different light diffraction orders, improving sensitivity and reducing errors associated with drift and disturbances in measurements.
Broadband Enhancement of Magneto-Optical Effects in Hybrid Waveguide-Plasmonic Surfaces for Sensing.
ACS Appl Mater Interfaces
August 2024
National Institute of Telecommunications (Inatel), 37540-000 Santa Rita do Sapucaí, Minas Gerais, Brazil.
Conventional magnetophotonic nanostructures typically function within narrow wavelength and incident angle ranges, where resonance is observed and magneto-optical (MO) effects are amplified. Expanding these operational ranges may allow for improved applications, including in (bio)sensing devices. In this study, we describe a hybrid magnetoplasmonic waveguide grating (HMPWG) in which the coupling of plasmonic resonances and waveguide modes leads to enhanced MO effects and sensitivity, according to full-wave electromagnetic simulations.
View Article and Find Full Text PDFUnidirectional guided-wave-driven metasurfaces for arbitrary wavefront control.
Nat Commun
July 2024
Department of Applied Physics, Zhejiang University of Technology, Hangzhou, 310023, China.
Metasurfaces are capable of fully reshaping the wavefronts of incident beams in desired manners. However, the requirement for external light excitation and the resonant nature of their meta-atoms, make challenging their on-chip integration. Here, we introduce the concept and design of a fresh class of metasurfaces, driven by unidirectional guided waves, capable of arbitrary wavefront control based on the unique dispersion properties of unidirectional guided waves rather than resonant meta-atoms.
View Article and Find Full Text PDFMode-multiplexing deep-strong light-matter coupling.
Nat Commun
February 2024
Department of Physics, TU Dortmund University, 44227, Dortmund, Germany.
Dressing electronic quantum states with virtual photons creates exotic effects ranging from vacuum-field modified transport to polaritonic chemistry, and squeezing or entanglement of modes. The established paradigm of cavity quantum electrodynamics maximizes the light-matter coupling strength , defined as the ratio of the vacuum Rabi frequency and the frequency of light, by resonant interactions. Yet, the finite oscillator strength of a single electronic excitation sets a natural limit to .
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