Journal
MICROMACHINES
Volume 11, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/mi11090824
Keywords
thermal radiation; metasurface; black metal
Categories
Funding
- Japan Society for the Promotion of Science (JSPS)
- JSPS [JSPSBP120194203]
- Japan Science and Technology Agency, A-STEP [JPMJTM19-EY]
- ARC Linkage [LP190100505]
- JST CREST [JPMJCR19I3]
- Australian Research Council [LP190100505] Funding Source: Australian Research Council
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Lithography-free black metals composed of a nano-layered stack of materials are attractive not only due to their optical properties but also by virtue of fabrication simplicity and the cost reduction of devices based on such structures. We demonstrate multi-layer black metal layered structures with engineered electromagnetic absorption in the mid-infrared (MIR) wavelength range. Characterization of thinSiO2and Si films sandwiched between two Au layers by way of experimental electromagnetic radiation absorption and thermal radiation emission measurements as well as finite difference time domain (FDTD) numerical simulations is presented. Comparison of experimental and simulation data derived optical properties of multi-layer black metals provide guidelines for absorber/emitter structure design and potential applications. In addition, relatively simple lithography-free multi-layer structures are shown to exhibit absorber/emitter performance that is on par with what is reported in the literature for considerably more elaborate nano/micro-scale patterned metasurfaces.
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