Emission properties of Ag/dielectric/Ag plasmonic thermal emitter with different lattice type, hole shape, and dielectric material

Yi-Tsung Chang; Yi-Tin Wu; Jheng-Han Lee; Hung-Hsin Chen; Chun-Yuan Hsueh; Hao-Fu Huang; Yu-Wei Jiang; Pei-En Chang; Si-Chen Lee
November 2009
Applied Physics Letters;11/23/2009, Vol. 95 Issue 21, p213102
Academic Journal
The emission spectra of the trilayer Ag/dielectric/Ag plasmonic thermal emitter (PTE) with different lattice type, hole shape, and dielectric material were investigated. It is found that the position and number of thermal emission peak of the PTE are determined by the lattice type not by the hole shape and dielectric materials. The PTE with hexagonal lattice generates only one strong (1,0) Ag/dielectric emission peak, whereas a similar PTE with square lattice generates two strong (1,0) and (1,1) Ag/dielectric emission peaks, their relative intensities follow the blackbody radiation law. This phenomenon suggests the coupling of Ag/dielectric and Ag/air modes.


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