scholarly journals Experimental Demonstration of Total Absorption over 99% in the Near Infrared for Monolayer‐Graphene‐Based Subwavelength Structures

2016 ◽  
Vol 4 (12) ◽  
pp. 1955-1960 ◽  
Author(s):  
Chu‐Cai Guo ◽  
Zhi‐Hong Zhu ◽  
Xiao‐Dong Yuan ◽  
Wei‐Min Ye ◽  
Ken Liu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Monolayer Graphene ◽  
Subwavelength Structures ◽  
Total Absorption ◽  
Experimental Demonstration

Approaching total absorption at near infrared in a large area monolayer graphene by critical coupling

2014 ◽  
Vol 105 (18) ◽  
pp. 181105 ◽  
Author(s):  
Yonghao Liu ◽  
Arvinder Chadha ◽  
Deyin Zhao ◽  
Jessica R. Piper ◽  
Yichen Jia ◽  
...  
Keyword(s):  
Near Infrared ◽  
Monolayer Graphene ◽  
Total Absorption ◽  
Critical Coupling ◽  
Large Area

A Study of GaAs1–xSbx Axial Nanowires Grown on Monolayer Graphene by Ga-Assisted Molecular Beam Epitaxy for Flexible Near-Infrared Photodetectors

2019 ◽  
Vol 2 (7) ◽  
pp. 4528-4537 ◽  
Author(s):  
Surya Nalamati ◽  
Manish Sharma ◽  
Prithviraj Deshmukh ◽  
Jeffrey Kronz ◽  
Robert Lavelle ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Near Infrared ◽  
Monolayer Graphene ◽  
Infrared Photodetectors

scholarly journals Graphene-Based Cylindrical Pillar Gratings for Polarization-Insensitive Optical Absorbers

2019 ◽  
Vol 9 (12) ◽  
pp. 2528 ◽  
Author(s):  
Muhammad Fayyaz Kashif ◽  
Giuseppe Valerio Bianco ◽  
Tiziana Stomeo ◽  
Maria Antonietta Vincenti ◽  
Domenico de Ceglia ◽  
...  
Keyword(s):  
Near Infrared ◽  
Monolayer Graphene ◽  
Geometrical Parameters ◽  
Guided Mode ◽  
Rigorous Coupled Wave Analysis ◽  
Dielectric Gratings ◽  
Method Effects ◽  
Polarization Insensitive ◽  
Rigorous Coupled Wave ◽  
Infrared Frequencies

In this study, we present a two-dimensional dielectric grating which allows achieving high absorption in a monolayer graphene at visible and near-infrared frequencies. Dielectric gratings create guided-mode resonances that are exploited to effectively couple light with the graphene layer. The proposed structure was numerically analyzed through a rigorous coupled-wave analysis method. Effects of geometrical parameters and response to the oblique incidence of the plane wave were studied. Numerical results reveal that light absorption in the proposed structure is almost insensitive to the angle of the impinging source over a considerable wide angular range of 20°. This may lead to the development of easy to fabricate and experimentally viable graphene-based absorbers in the future.

scholarly journals Robust Conformal Perfect Absorber Involving Lossy Ultrathin Film

Photonics ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 57
Author(s):  
Lei Zhang ◽  
Kun Wang ◽  
Hui Chen ◽  
Yanpeng Zhang
Keyword(s):  
Near Infrared ◽  
Incident Angle ◽  
Broad Band ◽  
Infrared Range ◽  
Subwavelength Structures ◽  
Perfect Absorber ◽  
Perfect Absorption ◽  
Absorption Performance ◽  
Near Infrared Range ◽  
Lossy Material

Perfect absorbers have been extensively investigated due to their significant value in solar cell, photodetection, and stealth technologies. Various subwavelength structures have been proposed to improve the absorption performances, such as high absorptance, broad band, and wide absorption angle. However, excellent performances usually put forward higher requirements on structural designs, such as varying the geometry sizes or shapes to fit different center wavelengths, which inevitably increases the fabrication burden. Here, a planar sandwich structure involving a layer of highly lossy material is proposed to achieve a robust perfect absorption with 95% absorptance ranging from the visible to near infrared range. Such an excellent absorption performance is also polarization-independent and applicable to a wide incident angle. Furthermore, the proposed design can also be applied to conformal surfaces with a 90% fluctuation over a steep surface. We believe that the proposed perfect absorber with distinguished performances can find wide application.

Experimental demonstration of Vehicle-borne Near Infrared Three-Dimensional Ghost Imaging LiDAR

2019 ◽  
Author(s):  
Xiaodong Mei ◽  
Chenglong Wang ◽  
Long Pan ◽  
Pengwei Wang ◽  
Wenlin Gong ◽  
...  
Keyword(s):  
Near Infrared ◽  
Three Dimensional ◽  
Ghost Imaging ◽  
Experimental Demonstration

scholarly journals Cu(In,Ga)Se2 Solar Cells Integrated with Subwavelength Structured Cover Glass Fabricated by One-Step Self-Masked Etching

Micromachines ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 877
Author(s):  
Ho-Jung Jeong ◽  
Ye-Chan Kim ◽  
Sung-Tae Kim ◽  
Min-Ho Choi ◽  
Young-Hyun Song ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Near Infrared ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Subwavelength Structures ◽  
Cover Glass ◽  
Cigs Thin Film ◽  
Average Transmittance ◽  
One Step

We report an anti-reflective cover glass for Cu(In,Ga)Se2 (CIGS) thin film solar cells. Subwavelength structures (SWSs) were fabricated on top of a cover glass using one-step self-masked etching. The etching method resulted in dense whiskers with high aspect ratio. The produced structure exhibited excellent anti-reflective properties over a broad wavelength range, from the ultraviolet to the near infrared. Compared to a flat-surface glass, the average transmittance of the glass integrated with the SWSs improved from 92.4% to 95.2%. When the cover glass integrated with the SWSs was mounted onto the top of a CIGS device, the short-circuit current and the efficiency of the solar cell were enhanced by 4.38 and 6%, respectively, compared with a CIGS solar cell without cover glass.

Near-Infrared Light Photovoltaic Detector Based on GaAs Nanocone Array/Monolayer Graphene Schottky Junction

2014 ◽  
Vol 24 (19) ◽  
pp. 2794-2800 ◽  
Author(s):  
Lin-Bao Luo ◽  
Jing-Jing Chen ◽  
Ming-Zheng Wang ◽  
Han Hu ◽  
Chun-Yan Wu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Light ◽  
Monolayer Graphene ◽  
Schottky Junction ◽  
Near Infrared Light ◽  
Photovoltaic Detector

Near-infrared Plasmonic Far-field Nanofocusing Effects with Elongated Depth of Focus based on Hybrid Au–Dielectric–Ag Subwavelength Structures

Plasmonics ◽  
2016 ◽  
Vol 11 (5) ◽  
pp. 1219-1231 ◽  
Author(s):  
Pengfei Cao ◽  
Lin Cheng ◽  
Xiaoping Zhang ◽  
Xuelin Huang ◽  
Hongmei Jiang
Keyword(s):  
Near Infrared ◽  
Subwavelength Structures ◽  
Far Field ◽  
Depth Of Focus
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