Experimental demonstration of a thermal-EM concentrator for enhancing EM signals and converging heat fluxes simultaneously

Abstract

Simultaneously concentrating EM waves and heat fluxes to the same target region within an on-chip system carries substantial academic research importance and practical application value. Nevertheless, existing researches are primarily aimed at the design and experimentation of concentrators for individual EM waves or temperature fields. In this work, a thermal-EM concentrator, capable of simultaneously concentrating EM waves and heat fluxes, is designed using transformation optics/thermodynamics and fabricated with engineered EM-thermal metamaterials. The concentrating effects of the proposed thermal-EM concentrator on the thermal fluxes and EM waves are verified through numerical simulations and experimental measurements, respectively, which are in good agreement with each other. Both numerically simulated and experimentally measured results demonstrate the concentrating capability of the proposed thermal-EM concentrator, which can concentrate broadband TM-polarized EM waves ranging from 8-12 GHz and heat/cold flows to the same target region within an on-chip operating environment. The thermal-EM concentrator exhibits a thermal focusing efficiency close to 100% and more than three times enhancement of the magnetic field at the designed center frequency of 10 GHz. The proposed thermal-EM concentrator can be utilized for efficient cooling for the specified component and simultaneously enhancing the EM antenna's radiation/reception efficiency within an on-chip system.

15 pages, 5 figures

References in corpus (5)

• Design of Electromagnetic Cloaks and Concentrators Using Form-Invariant Coordinate Transformations of Maxwell's Equations
• Theory of Supercoupling, Squeezing Wave Energy, and Field Confinement in Narrow Channels and Tight Bends Using Epsilon-Near-Zero Metamaterials
• Experimental demonstration of a multiphysics cloak: manipulating heat flux and electric current simultaneously
• Simultaneously realizing thermal and electromagnetic cloaking by multi-physical null medium
• Active thermal metasurfaces for remote heating/cooling by mimicking negative thermal conductivity

Cited by in corpus (3)

• Broadband planar electromagnetic hyper-lens with uniform magnification in air
• Implementation of ultra-broadband optical null media via space-folding
• Broadband source-surrounded cloak for on-chip antenna radiation pattern protection