Polarization-insensitive and wide-angle broadband absorption enhancement of molybdenum disulfide in visible regime

ABSTRACTCurrently, the performances of thin film solar cells are limited by poor light absorption and carrier collection. In this research, large, broadband, and polarization-insensitive light absorption enhancement was realized via incorporation of different periodic nanopetterns. By studying the enhancement effect brought by different materials, dimensions, coverage, and dielectric environments of the metal nanopatterns, we analyzed the absorption enhancement mechanisms as well as optimization criteria for our designs. A test for totaling the absorption over the solar spectrum shows an up to ∼30% broadband absorption enhancement when comparing to conventional thin film cells.

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A Photoexcited Broadband Absorption Based on Au Nano Cross Elliptical Disks Structure with Polarization-Insensitive and Wide-Angle for Visible Light

Plasmonics ◽

10.1007/s11468-016-0244-z ◽

2016 ◽

Vol 12 (1) ◽

pp. 165-170

Author(s):

Xiuli Jia ◽

Xiaoou Wang ◽

Zhongxiang Zhou ◽

Qingxin Meng

Keyword(s):

Visible Light ◽

Wide Angle ◽

Broadband Absorption ◽

Polarization Insensitive

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Polarization-insensitive broadband absorption enhancement with few-layer MoS2 film

Physics Letters A ◽

10.1016/j.physleta.2021.127511 ◽

2021 ◽

pp. 127511

Author(s):

Jun Wu

Keyword(s):

Absorption Enhancement ◽

Broadband Absorption ◽

Mos2 Film ◽

Polarization Insensitive

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Quasiperiodic plasmonic concentrators for enhanced light absorption in ultra-thin film solar cells

MRS Proceedings ◽

10.1557/opl.2013.156 ◽

2013 ◽

Vol 1493 ◽

pp. 323-328

Author(s):

Patrick W. Flanigan ◽

Aminy E. Ostfeld ◽

Zhen Ye ◽

Natalie G. Serrino ◽

Domenico Pacifici

Keyword(s):

Thin Film ◽

Rotational Symmetry ◽

Thin Film Solar Cells ◽

Absorption Enhancement ◽

Wide Angle ◽

Regular Polygons ◽

Cylindrical Holes ◽

Polarization Insensitive ◽

Sub Wavelength ◽

Array Geometry

ABSTRACTThis report will demonstrate broadband, wide-angle, and polarization-insensitive absorption enhancement in ultra-thin films resting on metal substrates that have been etched with arrays of shallow sub-wavelength cylindrical holes. Absorption enhancement will be studied as a function of array geometry, with particular emphasis given to quasiperiodic arrays (a class of deterministic aperiodic arrays that were originally developed to tessellate 2-D planes with regular polygons). Through simulations and experimental data, it was found that absorption enhancement is heavily dependent on the rotational symmetry of the pattern of holes, as well as the inter-hole distance.

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Polarization-Insensitive Broadband THz Absorber Based on Circular Graphene Patches

Nanomaterials ◽

10.3390/nano11102709 ◽

2021 ◽

Vol 11 (10) ◽

pp. 2709

Author(s):

Jiajia Qian ◽

Jun Zhou ◽

Zheng Zhu ◽

Zhenzhen Ge ◽

Shuting Wu ◽

...

Keyword(s):

Incident Angle ◽

Structural Parameters ◽

Single Layer Graphene ◽

Localized Surface Plasmon ◽

Wide Angle ◽

Absorption Bandwidth ◽

Broadband Absorption ◽

Simulation And Optimization ◽

Symmetrical Configuration ◽

Polarization Insensitive

A polarization-insensitive broadband terahertz absorber based on single-layer graphene metasurface has been designed and simulated, in which the graphene metasurface is composed of isolated circular patches. After simulation and optimization, the absorption bandwidth of this absorber with more than 90% absorptance is up to 2 THz. The simulation results demonstrate that the broadband absorption can be achieved by combining the localized surface plasmon (LSP) resonances on the graphene patches and the resonances caused by the coupling between them. The absorption bandwidth can be changed by changing the chemical potential of graphene and the structural parameters. Due to the symmetrical configuration, the proposed absorber is completely insensitive to polarization and have the characteristics of wide angle oblique incidence that they can achieve broadband absorption with 70% absorptance in the range of incident angle from 0° to 50° for both TE and TM polarized waves. The flexible and simple design, polarization insensitive, wide-angle incident, broadband and high absorption properties make it possible for our proposed absorber to have promising applications in terahertz detection, imaging and cloaking objects.

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