Enhanced plasmonic light absorption engineering of graphene: simulation by boundary-integral spectral element method

Niu, Jun; Luo, Ma; Zhu, Jinfeng; Liu, Qing

doi:10.1364/oe.23.004539

Cited by 15 publications

(7 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An analytical method based on characteristic matrices of multilayer thin films is used to calculate and optimize the optical absorption in graphene [18]. Full wave numerical simulation using a finite element method is also adopted to confirm the analytical optimization and provide a more comprehensive physical picture [19]. In this study, we mainly focus on graphene with a sub-nanometre thickness, which is much smaller than the wavelength of light and only induces the in-plane carrier transport for optical excitations.…”

Section: Theoretical Model and Research Methodsmentioning

confidence: 99%

Perfect light absorption in graphene by two unpatterned dielectric layers and potential applications

Zhu

et al. 2019

Carbon

Self Cite

View full text Add to dashboard Cite

In the spectral range from ultraviolet to near infrared, graphene lacks the capability to support plasmon polaritons, and has low optical absorptivity for applications due to its extremely small thickness. Many photonic structures based on sophisticated nanofabrication or metal plasmonics have been adopted to conquer this limitation, but they suffer from high expenses or metal parasitic losses. Here, a single-channel coherent perfect absorber simply based on two unpatterned dielectric layers is proposed to reach ~100% light absorption in monolayer and few-layer graphene. The schemes for narrowband and broadband perfect absorption in graphene are systematically demonstrated, and their potential applications on fibre-integrated narrowband perfect absorbers, high-performance optical sensors, electric-optic modulators and broadband perfect absorbers are also investigated. Our research provides a simple and costeffective method to completely trap the light from ultraviolet to near infrared in a subnanometre scale for a lot of high-performance photonic and optoelectronic devices based on graphene and potentially other 2D materials.

show abstract

Section: Theoretical Model and Research Methodsmentioning

confidence: 99%

Perfect light absorption in graphene by two unpatterned dielectric layers and potential applications

Zhu

et al. 2019

Carbon

Self Cite

View full text Add to dashboard Cite

show abstract

“…The characteristic matrix method is used to optimize the performance of graphene-based optical sensors. Additionally, we use a commercial numerical software (Comsol Multiphysics 5.3a) for full wave simulation and validation. , …”

Section: Methodsmentioning

confidence: 99%

“…Additionally, we use a commercial numerical software (Comsol Multiphysics 5.3a) for full wave simulation and validation. 37,38…”

Section: Methodsmentioning

confidence: 99%

High-Sensitivity Refractive Index Sensors Using Coherent Perfect Absorption on Graphene in the Vis-NIR Region

Qiu

et al. 2019

ACS Appl. Nano Mater.

Self Cite

View full text Add to dashboard Cite

Plasmonic structures with sophisticated nanofabrication have revolutionized the ability to trap light on the nanoscale and enable high-sensitivity refractive index sensing. Previous theoretical research has indicated that the sensitivity and figure of merit around the wavelength of 1 μm for a plasmonic sensing system can be up to 13000 nm/RIU and 138, respectively. In order to improve the sensing performance, we propose a graphene-based nonplasmonic sensor with the sensitivity over 440000 nm/RIU at the wavelength of 1 μm, which is 33 times more than the theoretical result of plasmonic sensors. Our graphene sensor is a nanofabrication-free design with perfect light confinement within a monolayer of graphene. Meanwhile, its figure of merit is up to the scale of thousands, which is also much higher than plasmonic sensors. Our scheme uses a simple dielectric structure with a monolayer of graphene and shows a great potential for low-cost sensing with high performance.

show abstract

“…However, the absorption efficiency of 2.3% is too low for the efficient operation of graphene-based photoelectric devices. Recently, to overcome the difficulty, a number of different solutions have been proposed [19,20], which mainly include surface plasmon polariton resonances [21,22], magnetic resonances [23,24], guided mode resonances [25,26], total internal reflections [27,28], Fabry-Perot resonances [29,30], surface bound states of photonic crystals [31,32], waveguide modes [33], coherent optical beams [34], etc. The fundamental physical principle of these different solutions is to greatly enhance the electric field intensity on the surface of graphene monolayer, and thus improve the absorption efficiency of graphene.…”

Section: Introductionmentioning

confidence: 99%

The Light Absorption Enhancement in Graphene Monolayer Resulting from the Diffraction Coupling of Surface Plasmon Polariton Resonance

Liu

Yan

et al. 2022

Nanomaterials

View full text Add to dashboard Cite

In this study, we investigate a physical mechanism to improve the light absorption efficiency of graphene monolayer from the universal value of 2.3% to about 30% in the visible and near-infrared wavelength range. The physical mechanism is based on the diffraction coupling of surface plasmon polariton resonances in the periodic array of metal nanoparticles. Through the physical mechanism, the electric fields on the surface of graphene monolayer are considerably enhanced. Therefore, the light absorption efficiency of graphene monolayer is greatly improved. To further confirm the physical mechanism, we use an interaction model of double oscillators to explain the positions of the absorption peaks for different array periods. Furthermore, we discuss in detail the emerging conditions of the diffraction coupling of surface plasmon polariton resonances. The results will be beneficial for the design of graphene-based photoelectric devices.

show abstract

Enhanced plasmonic light absorption engineering of graphene: simulation by boundary-integral spectral element method

Cited by 15 publications

References 23 publications

Perfect light absorption in graphene by two unpatterned dielectric layers and potential applications

Perfect light absorption in graphene by two unpatterned dielectric layers and potential applications

High-Sensitivity Refractive Index Sensors Using Coherent Perfect Absorption on Graphene in the Vis-NIR Region

The Light Absorption Enhancement in Graphene Monolayer Resulting from the Diffraction Coupling of Surface Plasmon Polariton Resonance

Contact Info

Product

Resources

About