Abstract
The low absorptivity of monolayer or few-layer graphene is one of the key limitations for high performance. To improve the graphene absorption, highly nanostructured or metallic systems have been usually employed, which however rely on the advanced nanofabrication with high cost or strong metallic parasitic absorption. In this study, via thin-film optics, the photonic surface waves based on purely dielectric planar system are proposed to realize perfect optical absorption by monolayer graphene with the thickness of ~ 0.34 nm. The Bloch surface wave (BSW) is found to be excited efficiently from 7-layer dielectric system by carefully addressing the admittance matching conditions, electric/magnetic field confinement, and band structure. Coupling with the strongly localized BSW field, a monolayer graphene shows an absorption ~ 100% at the designed infrared band (1310 nm, which can be tuned readily). With detailedly addressing the excitation condition of BSW, it is found that the perfect absorber can also be realized based on the more generalized surface waves from aperiodic structure. It is believed that the thin-film and purely dielectric surface wave system provides two-dimensional devices a promising opportunity for low-cost and high-performance applications.
| Original language | English |
|---|---|
| Pages (from-to) | 161-169 |
| Number of pages | 9 |
| Journal | Nano Energy |
| Volume | 48 |
| DOIs | |
| Publication status | Published - 1 Jun 2018 |
Keywords
- Admittance loci
- Bloch surface wave
- Graphene perfect absorber
- Surface wave
- Thin-film optics
Cite this
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Photonic surface waves enabled perfect infrared absorption by monolayer graphene. / Yang, Qianru; Zhang, Cheng; Wu, Shaolong; Li, Shaojuan; Bao, Qiaoliang; Giannini, Vincenzo; Maier, Stefan A.; Li, Xiaofeng.
In: Nano Energy, Vol. 48, 01.06.2018, p. 161-169.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Photonic surface waves enabled perfect infrared absorption by monolayer graphene
AU - Yang, Qianru
AU - Zhang, Cheng
AU - Wu, Shaolong
AU - Li, Shaojuan
AU - Bao, Qiaoliang
AU - Giannini, Vincenzo
AU - Maier, Stefan A.
AU - Li, Xiaofeng
PY - 2018/6/1
Y1 - 2018/6/1
N2 - The low absorptivity of monolayer or few-layer graphene is one of the key limitations for high performance. To improve the graphene absorption, highly nanostructured or metallic systems have been usually employed, which however rely on the advanced nanofabrication with high cost or strong metallic parasitic absorption. In this study, via thin-film optics, the photonic surface waves based on purely dielectric planar system are proposed to realize perfect optical absorption by monolayer graphene with the thickness of ~ 0.34 nm. The Bloch surface wave (BSW) is found to be excited efficiently from 7-layer dielectric system by carefully addressing the admittance matching conditions, electric/magnetic field confinement, and band structure. Coupling with the strongly localized BSW field, a monolayer graphene shows an absorption ~ 100% at the designed infrared band (1310 nm, which can be tuned readily). With detailedly addressing the excitation condition of BSW, it is found that the perfect absorber can also be realized based on the more generalized surface waves from aperiodic structure. It is believed that the thin-film and purely dielectric surface wave system provides two-dimensional devices a promising opportunity for low-cost and high-performance applications.
AB - The low absorptivity of monolayer or few-layer graphene is one of the key limitations for high performance. To improve the graphene absorption, highly nanostructured or metallic systems have been usually employed, which however rely on the advanced nanofabrication with high cost or strong metallic parasitic absorption. In this study, via thin-film optics, the photonic surface waves based on purely dielectric planar system are proposed to realize perfect optical absorption by monolayer graphene with the thickness of ~ 0.34 nm. The Bloch surface wave (BSW) is found to be excited efficiently from 7-layer dielectric system by carefully addressing the admittance matching conditions, electric/magnetic field confinement, and band structure. Coupling with the strongly localized BSW field, a monolayer graphene shows an absorption ~ 100% at the designed infrared band (1310 nm, which can be tuned readily). With detailedly addressing the excitation condition of BSW, it is found that the perfect absorber can also be realized based on the more generalized surface waves from aperiodic structure. It is believed that the thin-film and purely dielectric surface wave system provides two-dimensional devices a promising opportunity for low-cost and high-performance applications.
KW - Admittance loci
KW - Bloch surface wave
KW - Graphene perfect absorber
KW - Surface wave
KW - Thin-film optics
UR - http://www.scopus.com/inward/record.url?scp=85044510036&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2018.03.048
DO - 10.1016/j.nanoen.2018.03.048
M3 - Article
VL - 48
SP - 161
EP - 169
JO - Nano Energy
JF - Nano Energy
SN - 2211-2855
ER -