Narrowband thermal emission from Tamm plasmons of a modified distributed Bragg reflector
Narrowband thermal emission from Tamm plasmons of a modified distributed Bragg reflector
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DOI：
10.1063/1.5048950
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发表时间：
2018-10
影响因子：
4
通讯作者：
Zhiyu Wang;J. K. Clark;Y. Ho;B. Vilquin;H. Daiguji;J. Delaunay
中科院分区：
文献类型：
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作者：
Zhiyu Wang;J. K. Clark;Y. Ho;B. Vilquin;H. Daiguji;J. Delaunay
存在于金属薄膜和分布式布拉格反射器（DBR）之间的界面处的Tamm等离子体激元（TPs）可以被热激发，然后作为热辐射向外耦合，从而提供了一种实现易于制造和波长选择的红外发射器的手段。提出了一种改进的TP结构，该结构由具有与金属膜相邻的厚层的DBR组成，并且证明了该结构的高强度和窄带热发射。修改后的TP结构维持更高阶的TP模式，具有比标准TP结构更高的品质因子（Q因子）发射峰。在150 °C下对所提出的TP结构的发射的测量揭示了在5 μm附近的波长处具有最大值为0.94的发射率峰、0.01的背景和48的Q因子。此外，通过调整DBR层的厚度，实验实现了宽范围的发射波长（从4.4 μm到5.7 μm），从而证明了发射峰值波长的精细选择。
Tamm plasmons (TPs), which exist at the interface between a metallic film and a distributed Bragg reflector (DBR), can be thermally excited and then out-coupled as thermal radiation, providing a means to realize easy-to-fabricate and wavelength-selective infrared emitters. A modified TP structure consisting of a DBR having a thick layer adjacent to the metallic film is proposed and high-intensity and narrowband thermal emission of the structure is demonstrated. The modified TP structure sustains a higher order TP mode with a higher quality factor (Q-factor) emittance peak than a standard TP structure. The measurement of the emission at 150 °C of the proposed TP structure reveals an emittance peak with a maximum value of 0.94, a background of 0.01, and a Q-factor of 48 at a wavelength around 5 μm. Moreover, a wide range of emission wavelengths (from 4.4 μm to 5.7 μm) is experimentally realized by adjusting the last DBR-layer thickness, thus demonstrating a fine selection of the emission peak wavelength.