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

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

scholarly journals High Quality Factor, High Sensitivity Metamaterial Graphene—Perfect Absorber Based on Critical Coupling Theory and Impedance Matching

Nanomaterials ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 95 ◽  
Author(s):  
Chunlian Cen ◽  
Zeqiang Chen ◽  
Danyang Xu ◽  
Liying Jiang ◽  
Xifang Chen ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Quality Factor ◽  
Near Infrared ◽  
Coupling Effect ◽  
Impedance Matching ◽  
High Quality Factor ◽  
Monolayer Graphene ◽  
Perfect Absorber ◽  
Critical Coupling ◽  
High Quality

By means of critical coupling and impedance matching theory, we have numerically simulated the perfect absorption of monolayer graphene. Through the critical coupling effect and impedance matching, we studied a perfect single-band absorption of the monolayer graphene and obtained high quality factor (Q-factor = 664.2) absorption spectrum which has an absorbance close to 100% in the near infrared region. The position of the absorption spectrum can be adjusted by changing the ratio between the radii of the elliptic cylinder air hole and the structural period. The sensitivity of the absorber can be achieved S = 342.7 nm/RIU (RIU is the per refractive index unit) and FOM = 199.2 (FOM is the figure of merit), which has great potential for development on biosensors. We believe that our research will have good application prospects in graphene photonic devices and optoelectronic devices.

Perfect absorption in a monolayer graphene at the near-infrared using a compound waveguide grating by robust critical coupling

2019 ◽  
Vol 17 (1) ◽  
pp. 010501
Author(s):  
Jinhua Hu Jinhua Hu ◽  
Jia Fu Jia Fu ◽  
Xiuhong Liu Xiuhong Liu ◽  
Danping Ren Danping Ren ◽  
Jijun Zhao Jijun Zhao ◽  
...  
Keyword(s):  
Near Infrared ◽  
Monolayer Graphene ◽  
Critical Coupling ◽  
Perfect Absorption ◽  
Waveguide Grating

Total absorption by degenerate critical coupling

2014 ◽  
Vol 104 (25) ◽  
pp. 251110 ◽  
Author(s):  
Jessica R. Piper ◽  
Victor Liu ◽  
Shanhui Fan
Keyword(s):  
Total Absorption ◽  
Critical Coupling

scholarly journals Chemometric Tools for NIRS and NIR Hyperspectral Imaging

2012 ◽  
Vol 69 (1) ◽  
Author(s):  
Laura M. DALE ◽  
André THEWIS ◽  
Ioan ROTAR ◽  
Juan A. FERNANDEZ PIERNA ◽  
Christelle BOUDRY ◽  
...  
Keyword(s):  
Hyperspectral Imaging ◽  
Near Infrared ◽  
Agricultural Sector ◽  
Spatial Information ◽  
Imaging System ◽  
Agricultural Products ◽  
Chemical Information ◽  
Special Focus ◽  
Large Area ◽  
Analytical Tools

Nowadays in agriculture, new analytical tools based on spectroscopic technologies are developed. Near Infrared Spectroscopy (NIRS) is a well known technology in the agricultural sector allowing the acquisition of chemical information from the samples with a large number of advantages, such as: easy to use tool, fast and simultaneous analysis of several components, non-polluting, noninvasive and non destructive technology, and possibility of online or field implementation. Recently, NIRS system was combined with imaging technologies creating the Near Infrared Hyperspectral Imaging system (NIR-HSI). This technology provides simultaneously spectral and spatial information from an object. The main differences between NIR-HSI and NIRS is that many spectra can be recorded simultaneously from a large area of an object with the former while with NIRS only one spectrum was recorded for analysis on a small area. In this work, both technologies are presented with special focus on the main spectrum and images analysis methods. Several qualitative and quantitative applications of NIRS and NIR-HSI in agricultural products are listed. Developments of NIRS and NIR-HSI will enhance progress in the field of agriculture by providing high quality and safe agricultural products, better plant and grain selection techniques or compound feed industry’s productivity among others.

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

Multilayer Graphene-Based Carbon Interconnect

2012 ◽  
Vol 1407 ◽  
Author(s):  
Tianhua Yu ◽  
Edwin Kim ◽  
Nikhil Jain ◽  
Bin Yu
Keyword(s):  
Performance Metrics ◽  
Monolayer Graphene ◽  
Multilayer Graphene ◽  
Large Area ◽  
Electrical Stress ◽  
Oxygen Plasma Etching ◽  
Doping Technique ◽  
System Breakdown ◽  
Grown Graphene ◽  
On Chip

ABSTRACT3D stacked (or uncorrelated) multilayer graphene (s-MLG) is investigated as a potential material platform for carbon-based on-chip interconnects. S-MLG samples are prepared by repeatedly transferring and stacking the large-area CVD-grown graphene monolayers, followed by wire patterning and oxygen plasma etching of graphene. We observed superior wire conduction of s-MLG over that of monolayer graphene or ABAB-stacked multilayer graphene. Further reduction of s-MLG resistivity is anticipated with increasing number of stacked layers. Electrical stress-induced doping technique is used to engineer the Dirac point, as well as to reduce graphene-to-metal contact resistance, improving the overall performance metrics of the s-MLG system. Breakdown experiments show that the current-carrying capacity of s-MLG is significantly enhanced as compared with that of monolayer graphene.

Sign in / Sign up

Export Citation Format

Share Document