scholarly journals Thermal near-field energy density and local density of states in topological one-dimensional Su-Schrieffer-Heeger chains and two-dimensional Su-Schrieffer-Heeger lattices of plasmonic nanoparticles

2021 ◽  
Vol 104 (16) ◽  
Author(s):  
Annika Ott ◽  
Zhenghua An ◽  
Achim Kittel ◽  
Svend-Age Biehs
Keyword(s):  
Energy Density ◽  
Density Of States ◽  
Local Density ◽  
Near Field ◽  
Plasmonic Nanoparticles ◽  
Field Energy ◽  
Two Dimensional ◽  
Local Density Of States ◽  
One Dimensional ◽  
Field Energy Density

scholarly journals Near-Field Excitation of Bound States in the Continuum in All-Dielectric Metasurfaces through a Coupled Electric/Magnetic Dipole Model

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 998
Author(s):  
Diego R. Abujetas ◽  
José A. Sánchez-Gil
Keyword(s):  
Magnetic Dipole ◽  
Density Of States ◽  
Bound States ◽  
Local Density ◽  
Near Field ◽  
Field Pattern ◽  
Local Density Of States ◽  
Optical Modes ◽  
Source Excitation ◽  
The Continuum

Resonant optical modes arising in all-dielectric metasurfaces have attracted much attention in recent years, especially when so-called bound states in the continuum (BICs) with diverging lifetimes are supported. With the aim of studying theoretically the emergence of BICs, we extend a coupled electric and magnetic dipole analytical formulation to deal with the proper metasurface Green function for the infinite lattice. Thereby, we show how to excite metasurface BICs, being able to address their near-field pattern through point-source excitation and their local density of states. We apply this formulation to fully characterize symmetry-protected BICs arising in all-dielectric metasurfaces made of Si nanospheres, revealing their near-field pattern and local density of states, and, thus, the mechanisms precluding their radiation into the continuum. This formulation provides, in turn, an insightful and fast tool to characterize BICs (and any other leaky/guided mode) near fields in all-dielectric (and also plasmonic) metasurfaces, which might be especially useful for the design of planar nanophotonic devices based on such resonant modes.

scholarly journals Mapping the Radiative and the Apparent Nonradiative Local Density of States in the Near Field of a Metallic Nanoantenna

ACS Photonics ◽  
2015 ◽  
Vol 2 (2) ◽  
pp. 189-193 ◽  
Author(s):  
Da Cao ◽  
Alexandre Cazé ◽  
Michele Calabrese ◽  
Romain Pierrat ◽  
Nathalie Bardou ◽  
...  
Keyword(s):  
Density Of States ◽  
Local Density ◽  
Near Field ◽  
Local Density Of States
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