Multiband enhanced absorption of monolayer graphene with attenuated total reflectance configuration and sensing application

Wang, Nan; Bu, Lingbing; Chen, Yunyun; Zheng, Gaige; Zou, Xiujuan; Xu, Linhua; Wang, Jicheng

doi:10.7567/apex.10.015102

Cited by 17 publications

(7 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…But, it is still a challenge, as pointed out in the very recent reports [ 44 – 46 ]. At present, different approaches have been proposed to broaden the bandwidth of graphene absorption in wide frequency range from THz [ 44 – 62 ] and infrared [ 63 – 65 ] to optical frequencies [ 19 , 23 , 29 , 31 , 34 – 36 , 38 – 40 , 43 ]. Especially, a multi-resonator approach was proven to be a very effective method to resolve the bandwidth limitation of graphene absorption in the THz and infrared regions [ 45 , 46 , 62 , 63 ].…”

Section: Introductionmentioning

confidence: 99%

Multiband and Broadband Absorption Enhancement of Monolayer Graphene at Optical Frequencies from Multiple Magnetic Dipole Resonances in Metamaterials

et al. 2018

View full text Add to dashboard Cite

It is well known that a suspended monolayer graphene has a weak light absorption efficiency of about 2.3% at normal incidence, which is disadvantageous to some applications in optoelectronic devices. In this work, we will numerically study multiband and broadband absorption enhancement of monolayer graphene over the whole visible spectrum, due to multiple magnetic dipole resonances in metamaterials. The unit cell of the metamaterials is composed of a graphene monolayer sandwiched between four Ag nanodisks with different diameters and a SiO2 spacer on an Ag substrate. The near-field plasmon hybridizations between individual Ag nanodisks and the Ag substrate form four independent magnetic dipole modes, which result into multiband absorption enhancement of monolayer graphene at optical frequencies. When the resonance wavelengths of the magnetic dipole modes are tuned to approach one another by changing the diameters of the Ag nanodisks, a broadband absorption enhancement can be achieved. The position of the absorption band in monolayer graphene can be also controlled by varying the thickness of the SiO2 spacer or the distance between the Ag nanodisks. Our designed graphene light absorber may find some potential applications in optoelectronic devices, such as photodetectors.

show abstract

Section: Introductionmentioning

confidence: 99%

Multiband and Broadband Absorption Enhancement of Monolayer Graphene at Optical Frequencies from Multiple Magnetic Dipole Resonances in Metamaterials

et al. 2018

View full text Add to dashboard Cite

show abstract

“…In Ref [24], a maximum absorption of 60% was reported for a transverse magnetic (TM) wave with a monolayer resonant grating in the visible region. A broadband absorption enhancement (>75%) was observed in a multilayer structure [25] and nearly 100% visible absorption for single layer graphene was demonstrated in a multilayer, film-based, attenuated total reflectance configuration [26]. Perfect absorption (100%) in the visible and infrared regions was exhibited in absorption-cavity of graphene sandwiched in dielectric layers.…”

Section: Introductionmentioning

confidence: 97%

An Analytical Model for Optimizing the Optical Absorption of Graphene-Based Two-Dimensional Multilayer Structure

Hasanirokh

2022

J Low Temp Phys

View full text Add to dashboard Cite

Graphene is a two-dimensional (2D) material with honeycomb structure. Its unique and fantastic mechanical, physical electrical and optical properties make it to be an important industrially and economically material. In this work a simple analysis is performed for the Reflectance, transmittance, and absorption properties of multilayer thin film structure with graphene sandwiched in dielectric layers. Based on Maxwell's electromagnetic wave theory and coupled Fresnel equations, we investigate how to get maximum absorption for a proper choice of media and graphene layers. Numerical results show this absorption is controlled with matching thicknesses of layers, number of graphene layers, wavelength and angle of incident electromagnetic wave.

show abstract

“…More light absorption channels of graphene can be realized by increasing the thickness of the waveguide [ 32 ], and broadband absorption enhancement of graphene is possible by using multiple Ag nanodisk arrays [ 33 ]. On the other hand, the angular absorption channels of graphene can be increased by using attenuated-total-reflection configuration [ 34 ], and angularly dense comb-like enhanced absorption of graphene can be obtained by the excitation of guided-mode resonance of one-dimensional photonic crystals [ 35 ]. In real applications, the enhancement of light-graphene coupling in a wide spectral range is very important for devices such as photodetectors and photovoltaics.…”

Section: Introductionmentioning

confidence: 99%

Angle-Insensitive Broadband Absorption Enhancement of Graphene Using a Multi-Grooved Metasurface

et al. 2019

View full text Add to dashboard Cite

An angle-insensitive broadband absorber of graphene covering the whole visible spectrum is numerically demonstrated, which is resulted from multiple couplings of the electric and magnetic dipole resonances in the narrow metallic grooves. This is achieved by integrating the graphene sheet with a multi-grooved metasurface separated by a polymethyl methacrylate (PMMA) spacer, and an average absorption efficiency of 71.1% can be realized in the spectral range from 450 to 800 nm. The location of the absorption peak of graphene can be tuned by the groove depth, and the bandwidth of absorption can be flexibly controlled by tailoring both the number and the depth of the groove. In addition, broadband light absorption enhancement of graphene is robust to the variations of the structure parameters, and good absorption properties can be maintained even the incident angle is increased to 60°.Electronic supplementary materialThe online version of this article (10.1186/s11671-019-2937-7) contains supplementary material, which is available to authorized users.

show abstract

Multiband enhanced absorption of monolayer graphene with attenuated total reflectance configuration and sensing application

Cited by 17 publications

References 26 publications

Multiband and Broadband Absorption Enhancement of Monolayer Graphene at Optical Frequencies from Multiple Magnetic Dipole Resonances in Metamaterials

Multiband and Broadband Absorption Enhancement of Monolayer Graphene at Optical Frequencies from Multiple Magnetic Dipole Resonances in Metamaterials

An Analytical Model for Optimizing the Optical Absorption of Graphene-Based Two-Dimensional Multilayer Structure

Angle-Insensitive Broadband Absorption Enhancement of Graphene Using a Multi-Grooved Metasurface

Contact Info

Product

Resources

About