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

Article

关键词: HEAT;    RADIATION;    TIP;    ELECTRODYNAMICS;    FLUCTUATIONS;    DISSIPATION;    SAMPLE;   

DOI  :  10.1103/PhysRevB.104.165407

来源: SCIE

【 摘 要 】

We derive a general expression for the electric and magnetic part of the near-field energy density of N dipoles of temperatures T-1,..., T-N immersed in a background field having a different temperature T-b. In contrast to former expressions this inclusion of the background field allows for determining the energy density of heated or cooled isotropic dipolar objects within an arbitrary environment which is thermalized at a different temperature. Furthermore, we show how the energy density is related to the local density of states. We use this general expression to study the near-field enhanced energy density at the edges and corners of one-dimensional (1D) Su-Schrieffer-Heeger chains and 2D Su-Schrieffer-Heeger lattices of plasmonic InSb nanoparticles when the phase transition from a topological trivial to a topological nontrivial state is made. We discuss the robustness of these modes when adding defects and the possibility to measure the topological edge and corner modes.

【 授权许可】

Free