Giant enhancement of nanoscale thermal radiation based on hyperbolic graphene plasmons
- Georgia Inst. of Technology, Atlanta, GA (United States). G.W. Woodruff School of Mechanical Engineering
Excitation of surface plasmons enables super-Planckian thermal radiation far beyond the blackbody limit. By patterning a single layer of graphene sheet into ribbons, the closed circular dispersion of graphene plasmons is opened to become hyperbolic, leading to broadband singularities of density of states. Extremely high-k evanescent waves can now couple with hyperbolic graphene plasmons. Consequently, a giant enhancement of the near-field radiative heat flux, by more than one order of magnitude, is demonstrated here using rigorous numerical simulations. The findings may open promising pathways for highly efficient thermal management, energy harvesting, and sub-wavelength thermal imaging.
- Research Organization:
- Georgia Institute of Technology, Atlanta, GA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- Grant/Contract Number:
- FG02-06ER46343; CBET-1235975
- OSTI ID:
- 1469479
- Alternate ID(s):
- OSTI ID: 1223327
- Journal Information:
- Applied Physics Letters, Vol. 107, Issue 14; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 44 works
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