Emission bandwidth control on a two-dimensional superlattice microcavity array

Emission bandwidth control on a two-dimensional superlattice microcavity array

Narrowband thermal emission at high temperatures is required for various thermal energy systems. However, the large lossy energy of refractory metals induces a broad bandwidth emission. Here, we demonstrated a two-dimensional (2D) superlattice microcavity array on refractory metals to control the em...

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Veröffentlicht in:Optics express 2022-04, Vol.30 (8), p.13839-13846
Hauptverfasser: Liu, Zhen, Shimizu, Makoto, Yugami, Hiroo
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creator Liu, Zhen
Shimizu, Makoto
Yugami, Hiroo
description Narrowband thermal emission at high temperatures is required for various thermal energy systems. However, the large lossy energy of refractory metals induces a broad bandwidth emission. Here, we demonstrated a two-dimensional (2D) superlattice microcavity array on refractory metals to control the emission bandwidth. A hybrid resonance mode was obtained by coupling the standing-wave modes and propagating surface-wave modes. The bandwidth emission was controlled by varying the superlattice microcavity array resulting from the change in electric field (E-field) concentration. The quality factor (Q-factor) improved by more than 3 times compared to that of a single-lattice array. A narrower band emission originating from the hybrid mode was observed and analyzed experimentally. This novel surface-relief microstructure method can be used to control the emission bandwidth of thermal emitters used in thermophotovoltaic (TPV) systems and other high-temperature thermal energy systems.
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title Emission bandwidth control on a two-dimensional superlattice microcavity array
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