Using localized surface plasmons, the magneto-optical response of dielectric thin films can be resonantly amplified and spectrally tailored. While the experimental realization and numerical simulation of such systems received considerable attention, so far, there is no analytical theoretical description. Here, we present a simple, intrinsically Lorentz nonreciprocal coupled oscillator model that reveals the underlying physics inside such systems and yields analytical expressions for the resonantly enhanced magneto-optical response. The predictions of the model are in good agreement with rigorous numerical solutions of Maxwell's equations for typical sample geometries. Our ansatz is transferable to other complex and hybrid nanooptical systems and will significantly facilitate device design.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.117.063901 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Optical metasurfaces employing the Pancharatnam-Berry (PB) geometric phase, called PB metasurfaces, have been extensively applied to realize spin-dependent light manipulations. However, the properties of conventional PB metasurfaces are intrinsically limited by the Lorentz reciprocity. Breaking reciprocity can give rise to new properties and phenomena unavailable in conventional reciprocal systems.
View Article and Find Full Text PDFMagneto-optical chiral metasurfaces for achieving polarization-independent nonreciprocal transmission.
Sci Adv
August 2024
New Cornerstone Science Laboratory, Department of Physics, The University of Hong Kong, Hong Kong 999077, China.
Nonreciprocal transmission, resulting from the breaking of Lorentz reciprocity, plays a pivotal role in nonreciprocal communication systems by enabling asymmetric forward and backward propagations. Metasurfaces endowed with nonreciprocity represent a compact and facile platform for manipulating electromagnetic waves in an unprecedented manner. However, most passive metasurfaces that achieve nonreciprocal transmissions are polarization dependent.
View Article and Find Full Text PDFWide-angle camouflage detectors by manipulating emissivity using a non-reciprocal metasurface array.
Phys Chem Chem Phys
January 2024
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, China.
Camouflage detectors that can detect incoming radiation from any angle without being detected are extremely important in stealth, guided missile, and heat-seeking missile industries. In order to accomplish this, the absorption and emission processes must be manipulated simultaneously. However, Kirchhoff's fundamental law suggests that absorption and emission are always in the same direction () = (), , absorption and emission are reciprocal.
View Article and Find Full Text PDFEnhanced Faraday rotation by a Fano resonance in substrate-free three-dimensional magnetoplasmonic structures.
Nanoscale
October 2023
Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China.
Article Synopsis
- Three-dimensional magnetoplasmonic nanostructures offer improved optical and magneto-optical properties compared to flat structures, presenting new opportunities in photonic devices.
- Traditional fabrication methods struggle with creating these complex 3D structures, but this research successfully utilizes focused ion beam (FIB) technology to build substrate-free Au/Co/Au configurations.
- The study reveals that these designs can effectively manipulate the Faraday effect, enhancing the local magnetic field and allowing for tunable properties, which greatly expands the potential for innovative magneto-optical devices.
Lorentz famous theorem leads to clear reciprocity conditions for linear, time-invariant media based on their constitutive parameters. By contrast, reciprocity conditions for linear time-varying media are not fully explored. In this paper, we investigate whether, and how a structure containing a time-periodic medium can be truly identified as reciprocal or not.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!