2015/04/08 by Ding Ding, D. Ding, Taeyong Kim +1
Engineering · Physics and Astronomy · #Condensed matter physics #Field (mathematics) #Laser #Materials science #Monochromatic color #Near and far field #Optical properties and cooling technologies in crystalline materials #Optics #Optoelectronics #Phonon #Physics #Polariton #Quantum Electrodynamics and Casimir Effect #Radiation #Radiative transfer #Surface phonon #Thermal #Thermal Radiation and Cooling Technologies #Thermal radiation #Wavelength #cond-mat.mes-hall #physics.optics
paper · pdf · doi:10.1103/physrevb.93.081402
14 pages, 4 figures
arxiv created 2015/04/08 · openalex publication_date 2016/02/02 · arxiv updated 2016/03/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Radiative heat transport between materials supporting surface-phonon polaritons is greatly enhanced when the materials are placed at subwavelength separation as a result of the contribution of near-field surface modes. However, the enhancement is limited to small separations due to the evanescent decay of the surface waves. In this work, we propose and numerically demonstrate an active scheme to extract these modes to the far field. Our approach exploits the monochromatic nature of near-field thermal radiation to drive a transition in a laser gain medium, which, when coupled with external optical pumping, allows the resonant surface mode to be emitted into the far field. Our study demonstrates an approach to manipulate thermal radiation that could find applications in thermal management.