講演情報
[17a-A35-2]Absorption Enhancement of Excitons in WS2 by Silicon Huygens’ Metasurface
〇(D)Dingwei Chen1, Junichi Takahara1,2 (1.GSE. Osaka Univ., 2.PC. Osaka Univ.)
キーワード：
Silicon Huygens' metasurface、2D material、Mie resonators
Strong visible absorption of light in semiconducting two-dimensional transition-metal dichalcogenides (TMDCs) is essential for improving the photocarrier extraction efficiency in optoelectronic devices. However, their ultrathin thickness leads to limited optical absorption. To accomplish adequate light absorption, a dielectric-based Silicon (Si) Huygens’ metasurface (HMS) based on degenerate critical coupling (DCC) can realize superimposed modes enhancement effects on WS2.
In this study, we design and fabricate Si HMS to enhance the absorption of WS2. The enhancement is as high as 0.56 in simulation. Meanwhile, we demonstrate that small monolayer WS2 fragment is successfully transferred to the metasurface utilizing poly (propylene) carbonate (PPC) films.
Our observations undeniably establish the groundwork for a material platform enabling high-efficiency photodetection, energy harvesting, and thermal emission based on TMDCs.
In this study, we design and fabricate Si HMS to enhance the absorption of WS2. The enhancement is as high as 0.56 in simulation. Meanwhile, we demonstrate that small monolayer WS2 fragment is successfully transferred to the metasurface utilizing poly (propylene) carbonate (PPC) films.
Our observations undeniably establish the groundwork for a material platform enabling high-efficiency photodetection, energy harvesting, and thermal emission based on TMDCs.
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