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Annual Review of Heat Transfer
Vish Prasad (open in a new tab) Department of Mechanical Engineering, University of North Texas, Denton, Texas 76207, USA
Yogesh Jaluria (open in a new tab) Department of Mechanical and Aerospace Engineering, Rutgers-New Brunswick, The State University of New Jersey, Piscataway, NJ 08854, USA
Zhuomin M. Zhang (open in a new tab) George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA

ISSN Print: 1049-0787

ISSN Online: 2375-0294

SJR: 0.363 SNIP: 0.21 CiteScore™:: 1.8

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CHEMICAL POTENTIAL OF PHOTONS AND ITS IMPLICATIONS FOR CONTROLLING RADIATIVE HEAT TRANSFER

pages 397-431
DOI: 10.1615/AnnualRevHeatTransfer.2020032934
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ABSTRACT

In conventional photon-based heat transfer, one typically assumes that the chemical potential of photons is zero. On the other hand, when a semiconductor is under external biases, the photons with energy above the semiconductor bandgap can exhibit a nonzero chemical potential that is proportional to the applied voltage. The presence of such nonzero chemical potential points to the abilities to drastically enhance the power density of photon-based heat flow, to electronically control photon-based heat transfer, and to construct photon-based heat engines for energy harvesting and solid-state cooling. In this review, we discuss basic concepts and applications of chemical potential of photons in controlling radiative heat transfer.

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