Tunable narrow band perfect metamaterial absorber based on guided-mode resonance

2019 ◽  
Vol 33 (16) ◽  
pp. 1950171 ◽  
Author(s):  
Zhibin Ren ◽  
Yahui Sun ◽  
Shuqing Zhang ◽  
Zihao Lin ◽  
Chunyu Wang
Keyword(s):  
Narrow Band ◽  
Thin Film Deposition ◽  
Metamaterial Absorber ◽  
Visible Spectral Region ◽  
Film Deposition ◽  
Reflection Spectra ◽  
Guided Mode ◽  
Perfect Metamaterial Absorber ◽  
Guided Mode Resonance ◽  
Rigorous Coupled Wave

The tunable narrow band perfect metamaterial absorber (PMA) based on guided-mode resonance (GMR) for the visible spectral region is proposed. The PMA is composed of a one-dimensional grating layer, two waveguide layers and an Ag substrate. Tunable narrow band PMAs are designed using rigorous coupled-wave analysis by comparing the GMR effects for the filters and absorbers. Afterwards, two tunable PMA samples are fabricated through thin-film deposition and ultraviolet lithographic patterning. Finally, the reflection spectra of the fabricated PMA samples are measured. The absorption spectra obtained by subtracting the measured reflection spectra from 1 are consistent with the theory.

Impact of Buffer Layer on Cut-Off Properties of Reflection Spectra for Guided-Mode Resonance Filters

2009 ◽  
Vol 29 (3) ◽  
pp. 849-852
Author(s):  
王振华 Wang Zhenhua ◽  
吴永刚 Wu Yonggang ◽  
桑田 Sang Tian ◽  
王占山 Wang Zhanshan ◽  
彭东功 Peng Donggong ◽  
...  
Keyword(s):  
Buffer Layer ◽  
Reflection Spectra ◽  
Guided Mode ◽  
Guided Mode Resonance

Reflection Spectra Properties of Guided-Mode Resonance Filters with Buffer Layer

2008 ◽  
Vol 28 (7) ◽  
pp. 1425-1428
Author(s):  
王振华 Wang Zhenhua ◽  
吴永刚 Wu Yonggang ◽  
桑田 Sang Tian ◽  
王占山 Wang Zhanshan ◽  
彭东功 Peng Donggong ◽  
...  
Keyword(s):  
Buffer Layer ◽  
Reflection Spectra ◽  
Guided Mode ◽  
Guided Mode Resonance ◽  
Spectra Properties

scholarly journals Enhanced Visible Light Absorption by 3C-SiC Nanoparticles Embedded in Si Solar Cells by Plasma-Enhanced Chemical Vapor Deposition

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Bhaskar Parida ◽  
Jaeho Choi ◽  
Gyoungho Lim ◽  
Kiseok Kim ◽  
Keunjoo Kim
Keyword(s):  
Solar Cells ◽  
Chemical Vapor Deposition ◽  
Solar Cell ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Thin Film Deposition ◽  
Visible Spectral Region ◽  
Film Deposition ◽  
Sic Nanoparticles ◽  
Infrared Spectral

Solar cells with 3C-SiC nanoparticles embedded in the Si were investigated by plasma-enhanced chemical vapor deposition. Several sizes of SiC nanoparticles were used as the intermediate layer for the solar cell. The Si thin films showed the formation of micro- and nanocrystallites on the SiC nanoparticle sites, which play an important role of heating block as a nanosubstrate. The Raman spectra revealed that the SiC nanoparticles were embedded in mixed phases of amorphous and nanocrystalline Si. Compared to the conventional solar cell sample, the photoreflectance was significantly reduced in the UV/visible spectral region due to the presence of the embedded 3C-SiC nanoparticles. The Si nanocrystals formed by the thin film deposition played an important role in reducing the photoreflectance within the visible to infrared spectral zones. Furthermore, the SiC nanoparticles contributed less in the photoabsorption at a longer infrared spectral zone wavelength of 1200 nm.

Characterization of Sputtered Films using the Scanning Electron Microscope

1973 ◽  
Vol 31 ◽  
pp. 44-45
Author(s):  
R. F. Schneidmiller ◽  
W. F. Thrower ◽  
C. Ang
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Sputtered Films ◽  
Plasma Sputtering ◽  
Microelectronic Devices ◽  
Control Film ◽  
Scanning Electron

Solid state materials in the form of thin films have found increasing structural and electronic applications. Among the multitude of thin film deposition techniques, the radio frequency induced plasma sputtering has gained considerable utilization in recent years through advances in equipment design and process improvement, as well as the discovery of the versatility of the process to control film properties. In our laboratory we have used the scanning electron microscope extensively in the direct and indirect characterization of sputtered films for correlation with their physical and electrical properties.Scanning electron microscopy is a powerful tool for the examination of surfaces of solids and for the failure analysis of structural components and microelectronic devices.

Observations on the growth of YBa2Cu3O7-δ thin films on MgO by pulsed-laser ablation

1991 ◽  
Vol 49 ◽  
pp. 1068-1069
Author(s):  
M. Grant Norton ◽  
C. Barry Carter
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Laser Ablation ◽  
Substrate Surface ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Laser Ablation Process ◽  
Deposition Parameters

Pulsed-laser ablation has been widely used to produce high-quality thin films of YBa2Cu3O7-δ on a range of substrate materials. The nonequilibrium nature of the process allows congruent deposition of oxides with complex stoichiometrics. In the high power density regime produced by the UV excimer lasers the ablated species includes a mixture of neutral atoms, molecules and ions. All these species play an important role in thin-film deposition. However, changes in the deposition parameters have been shown to affect the microstructure of thin YBa2Cu3O7-δ films. The formation of metastable configurations is possible because at the low substrate temperatures used, only shortrange rearrangement on the substrate surface can occur. The parameters associated directly with the laser ablation process, those determining the nature of the process, e g. thermal or nonthermal volatilization, have been classified as ‘primary parameters'. Other parameters may also affect the microstructure of the thin film. In this paper, the effects of these ‘secondary parameters' on the microstructure of YBa2Cu3O7-δ films will be discussed. Examples of 'secondary parameters' include the substrate temperature and the oxygen partial pressure during deposition.

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