Journal
NANO LETTERS
Volume 19, Issue 11, Pages 8082-8088Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.9b03269
Keywords
near-field thermal radiation; surface plasmon and phonon polaritons coupling; graphene-SiO2 heterostructure; nanoscale heat transfer measurement; energy transmission coefficient; fluctuational electrodynamics
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Funding
- National Natural Science Foundation of China [91833303, 11621101, 61550110246]
- National Key Research and Development Program of China [2017YFA0205700]
- Guangdong Innovative Research Team Program [201001D0104799318]
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Coupling modes between surface plasmon polaritons (SPPs) and surface phonon polaritons (SPhPs) play a vital role in enhancing near-field thermal radiation but are relatively unexplored, and no experimental result is available. Here, we consider the NFTR enhancement between two identical graphene-covered SiO2 heterostructures with millimeter-scale surface area and report an experimentally record-breaking, similar to 64-fold enhancement compared to blackbody (BB) limit at a gap distance of 170 nm. The energy transmission coefficient and radiation spectra show that the physical mechanism behind the colossal enhancement is the coupling between the surface plasmon and phonon polaritons.
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