title: A fully functionalized metamaterial perfect absorber with simple design and implementation.
abstract: Broadband perfect metamaterial absorbers have been drawing significant attention in recent years. A close-to-unity absorption over a broad spectral range is established and this facilitates many photonic applications. A more challenging goal is to construct a broadband absorber with a tailored spectral absorption. The spectral absorption control and spectral shaping are very critical in many applications, such as thermal-photovoltaic, thermal emitters, spectrum imaging system, biomedical and extraterrestrial sensing, and refractive index sensor. In this work, one-dimensional (1D) planar stacking structure is designed to achieve the ultimate goal of a functionalized absorber with a fully tailorable spectral absorption. The lithography and etching process are totally eliminated in this proposed structure, and the fabrication is fully compatible with the regular silicon IC processing. By using ~2 nm ultra-thin metallic layers with a 10-pair (10X) SiO2/Si3N4integrated dielectric filter, we can achieve decent spectral response shaping. The planar configuration of the ultra-thin-metal metamaterial perfect absorber (MPA) is the key to the easy design/integration of the dielectric filters on top of the MPA. Specifically, band-rejected, high-pass, low-pass and band-pass structure are constructed successfully. Finally, experimental evidence to support our simulation result is also provided, which proves the feasibility of our proposal.
authors: Department of Electronics Engineering, National Chiao-Tung University, 1001 University Road, Hsinchu, Taiwan.
authors: Sze Ming
authors: SM
authors: Fu
authors: Department of Electronics Engineering, National Chiao-Tung University, 1001 University Road, Hsinchu, Taiwan.
authors: Yan Kai
authors: YK
authors: Zhong
authors: Department of Electronics Engineering, National Chiao-Tung University, 1001 University Road, Hsinchu, Taiwan.
authors: Ming Hsiang
authors: MH
authors: Tu
authors: Department of Electronics Engineering, National Chiao-Tung University, 1001 University Road, Hsinchu, Taiwan.
authors: Bo Ruei
authors: BR
authors: Chen
authors: Department of Electronics Engineering, National Chiao-Tung University, 1001 University Road, Hsinchu, Taiwan.
authors: Albert
authors: A
authors: Lin