Tuning coherent radiative thermal conductance in multilayer photonic crystals

Wah Tung Lau, Jung Tsung Shen, Georgios Veronis, Shanhui Fan, Paul V. Braun

Research output: Contribution to journalArticle


We consider coherent radiative thermal conductance of a multilayer photonic crystal. The crystal consists of alternating layers of lossless dielectric slabs and vacuum, where heat is conducted only through photons. We show that such a structure can have thermal conductance below vacuum over the entire high temperature range due to the presence of partial band gap in most of the frequency range, as well as the suppression of evanescent tunneling between slabs at higher frequencies. The thermal conductance of this structure is highly tunable by varying the thickness of the vacuum layers.

Original languageEnglish (US)
Article number103106
JournalApplied Physics Letters
Issue number10
StatePublished - Mar 24 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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