Acta Optica Sinica, Volume. 41, Issue 22, 2224001(2021)
Dual-Peak Near-Perfect Absorption of Amorphous Silicon Nanocylinder Cluster Metasurface
Fig. 1. Amorphous silicon nano cylinder cluster metasurface. (a) Schematic of amorphous silicon nano cylinder cluster metasurface; (b) refractive index and extinction coefficient of amorphous silicon
Fig. 2. Scattering cross section of amorphous silicon nano cylinder cluster metasurface
Fig. 3. Effective polarizabilities of amorphous silicon nano cylinder cluster metasurface, where periods are Dx=Dy=400 nm. (a) Imaginary parts of effective polarizabilities; (b) real parts of effective polarizabilities
Fig. 4. Simulation spectra of amorphous silicon nano cylinder cluster metasurface
Fig. 5. Simulated displacement currents and electric field distributions in x-y plane and x-z plane at resonant wavelengths of amorphous silicon nano cylinder cluster metasurface [Figs. 5(a) and 5(b) are respectively captured at the dotted line positions in Figs. 5(c) and 5(d)]. (a) In x-y plane at 654 nm; (b) in x-y plane at 667 nm; (c) in x-z plane at 654 nm; (d) in x-z plane at 667 nm
Fig. 6. Optical spectra of amorphous silicon nano cylinder cluster metasurface with varied incident angle, where Dx=400 nm, Dy=400 nm, r1=80 nm, r2=63 nm, d1=90 nm, and d2=80 nm. (a) Transmission spectrum; (b) reflection spectrum; (c) absorption spectrum
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Li Shao, Jiangnan Si, Xiaoxu Deng. Dual-Peak Near-Perfect Absorption of Amorphous Silicon Nanocylinder Cluster Metasurface[J]. Acta Optica Sinica, 2021, 41(22): 2224001
Category: Optics at Surfaces
Received: Apr. 14, 2021
Accepted: Jun. 1, 2021
Published Online: Nov. 23, 2021
The Author Email: Li Shao (2304694600@qq.com)