scholarly journals A Perfect Absorber Based on Similar Fabry-Perot Four-Band in the Visible Range

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 488 ◽  
Author(s):  
Pinghui Wu ◽  
Congfen Zhang ◽  
Yijun Tang ◽  
Bin Liu ◽  
Li Lv
Keyword(s):  
Near Infrared ◽  
Layer Structure ◽  
Incident Angle ◽  
Middle Layer ◽  
Absorption Efficiency ◽  
Visible Range ◽  
Polarization Angle ◽  
Perfect Absorber ◽  
Perfect Absorption ◽  
Fabry Perot

A simple metamaterial absorber is proposed to achieve near-perfect absorption in visible and near-infrared wavelengths. The absorber is composed of metal-dielectric-metal (MIM) three-layer structure. The materials of these three-layer structures are Au, SiO2, and Au. The top metal structure of the absorber is composed of hollow three-dimensional metal rings regularly arranged periodically. The results show that the high absorption efficiency at a specific wavelength is mainly due to the resonance of the Fabry–Perot effect (FP) in the intermediate layer of the dielectric medium, resulting in the resonance light being trapped in the middle layer, thus improving the absorption efficiency. The almost perfect multiband absorption, which is independent of polarization angle and insensitivity of incident angle, lends the absorber great application prospects for filtering and optoelectronics.

scholarly journals Refractory Ultra-Broadband Perfect Absorber from Visible to Near-Infrared

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1038 ◽  
Author(s):  
Huixuan Gao ◽  
Wei Peng ◽  
Shuwen Chu ◽  
Wenli Cui ◽  
Zhi Liu ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Near Infrared ◽  
Layer Structure ◽  
Incident Angle ◽  
Cavity Resonance ◽  
Perfect Absorber ◽  
Perfect Absorption ◽  
Excellent Thermal Stability ◽  
Broadband Absorption ◽  
The Earth

The spectral range of solar radiation observed on the earth is approximately 295 to 2500 nm. How to widen the absorption band of the plasmonic absorber in this range has become a hot issue in recent years. In this paper, we propose a highly applicable refractory perfect absorber with an elliptical titanium nanodisk array based on a silica–titanium–silica–titanium four-layer structure. Through theoretical design and numerical demonstration, the interaction of surface plasmon resonance with the Fabry–Perot cavity resonance results in high absorption characteristics. Our investigations illustrate that it can achieve ultra-broadband absorption above 90% from a visible 550-nm wavelength to a near-infrared 2200-nm wavelength continuously. In particular, a continuous 712-nm broadband perfect absorption of up to 99% is achieved from wavelengths from 1013 to 1725 nm. The air mass 1.5 solar simulation from a finite-difference time domain demonstrates that this absorber can provide an average absorption rate of 93.26% from wavelengths of 295 to 2500 nm, which can absorb solar radiation efficiently on the earth. Because of the high melting point of Ti material and the symmetrical structure of this device, this perfect absorber has excellent thermal stability, polarization independence, and large incident-angle insensitivity. Hence, it can be used for solar cells, thermal emitters, and infrared detection with further investigation.

scholarly journals Bismuth-based metamaterials: from narrowband reflective color filter to extremely broadband near perfect absorber

Nanophotonics ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 823-832 ◽  
Author(s):  
Amir Ghobadi ◽  
Hodjat Hajian ◽  
Murat Gokbayrak ◽  
Bayram Butun ◽  
Ekmel Ozbay
Keyword(s):  
Large Scale ◽  
Near Infrared ◽  
Solar Irradiation ◽  
Color Filter ◽  
Visible Range ◽  
Perfect Absorber ◽  
Perfect Absorption ◽  
Metal Insulator ◽  
Metal Insulator Metal ◽  
Sub Wavelength

AbstractIn recent years, sub-wavelength metamaterials-based light perfect absorbers have been the subject of many studies. The most frequently utilized absorber configuration is based on nanostructured plasmonic metals. However, two main drawbacks were raised for this design architecture. One is the fabrication complexity and large scale incompatibility of these nano units. The other one is the inherent limitation of these common metals which mostly operate in the visible frequency range. Recently, strong interference effects in lithography-free planar multilayer designs have been proposed as a solution for tackling these drawbacks. In this paper, we reveal the extraordinary potential of bismuth (Bi) metal in achieving light perfect absorption in a planar design through a broad wavelength regime. For this aim, we adopted a modeling approach based on the transfer matrix method (TMM) to find the ideal conditions for light perfect absorption. According to the findings of our modeling and numerical simulations, it was demonstrated that the use of Bi in the metal-insulator-metal-insulator (MIMI) configuration can simultaneously provide two distinct functionalities; a narrow near unity reflection response and an ultra-broadband near perfect absorption. The reflection behavior can be employed to realize additive color filters in the visible range, while the ultra-broadband absorption response of the design can fully harvest solar irradiation in the visible and near infrared (NIR) ranges. The findings of this paper demonstrate the extraordinary potential of Bi metal for the design of deep sub-wavelength optical devices.

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.

scholarly journals Multiple-patterning colloidal lithography-implemented scalable manufacturing of heat-tolerant titanium nitride broadband absorbers in the visible to near-infrared

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Dasol Lee ◽  
Myeongcheol Go ◽  
Minkyung Kim ◽  
Junho Jang ◽  
Chungryong Choi ◽  
...  
Keyword(s):  
Titanium Nitride ◽  
Large Scale ◽  
Near Infrared ◽  
Infrared Region ◽  
Absorption Efficiency ◽  
Perfect Absorber ◽  
Colloidal Lithography ◽  
Perfect Absorption ◽  
Broadband Absorber ◽  
Heat Tolerant

AbstractBroadband perfect absorbers have been intensively researched for decades because of their near-perfect absorption optical property that can be applied to diverse applications. Unfortunately, achieving large-scale and heat-tolerant absorbers has been remained challenging work because of costly and time-consuming lithography methods and thermolability of materials, respectively. Here, we demonstrate a thermally robust titanium nitride broadband absorber with >95% absorption efficiency in the visible and near-infrared region (400–900 nm). A relatively large-scale (2.5 cm × 2.5 cm) absorber device is fabricated by using a fabrication technique of multiple-patterning colloidal lithography. The optical properties of the absorber are still maintained even after heating at the temperatures >600 ∘C. Such a large-scale, heat-tolerant, and broadband near-perfect absorber will provide further useful applications in solar thermophotovoltaics, stealth, and absorption controlling in high-temperature conditions.

scholarly journals Hybrid Metamaterials Perfect Absorber and Sensitive Sensor in Optical Communication Band

2021 ◽  
Vol 9 ◽  
Author(s):  
Xuehan Liu ◽  
Keyang Li ◽  
Zhao Meng ◽  
Zhun Zhang ◽  
Zhongchao Wei
Keyword(s):  
Optical Communication ◽  
Electromagnetic Waves ◽  
Incident Angle ◽  
Silicon Layer ◽  
Resonance Wavelength ◽  
Metamaterial Absorber ◽  
Absorption Peak ◽  
Dual Band ◽  
Perfect Absorber ◽  
Perfect Absorption

A subwavelength metamaterial perfect absorber (MPA) in optical communication band was proposed and tested using the finite-difference time-domain method. The absorber is periodic and comprises a top layer of diamond silicon surrounded by L-shaped silicon and a gold layer on the substrate. It can achieve dual-band perfect absorption, and one of the peaks is in the optical communication band. By changing the gap (g) between two adjacent pieces of L-shaped silicon, and the thickness (h) of the silicon layer, the resonance wavelength of absorption peak can be tuned. When the incident electromagnetic wave entered the absorber, the metamaterial absorber could almost completely consume the incident electromagnetic waves, thereby achieving more than 99% perfect absorption. The absorption peak reaches 99.986% at 1310 nm and 99.421% at 1550 nm. Moreover, the MPA exposed to different ambient refraction indexes can be applied as plasma sensors, and can achieve multi-channel absorption with high figure of merit (FOM*) value and refractive index (RI) sensitivity. The FOM* values at 1310 nm and 1550 nm are 6615 and 168, respectively, and both resonance peaks have highly RI sensitivity. The results confirm that the MPA is a dual-band, polarization-independent, wide-angle absorber and insensitive to incident angle. Thence it can be applied in the fields of optical communication, used as a light-wave filter and plasma sensor, and so on.

scholarly journals Research on Perfect and Tunable Metamaterial Absorber Based on Crosshair-shaped Graphene

2021 ◽  
Vol 2109 (1) ◽  
pp. 012015
Author(s):  
Yiran Guo ◽  
Yunping Qi ◽  
Chuqin Liu ◽  
Weiming Liu ◽  
Xiangxian Wang
Keyword(s):  
Relaxation Time ◽  
Chemical Potential ◽  
Incident Angle ◽  
Fdtd Method ◽  
Reference Value ◽  
Metamaterial Absorber ◽  
Selective Absorption ◽  
Perfect Absorber ◽  
Wide Angle ◽  
Perfect Absorption

Abstract Graphene, as a new nano-material, according to the physical properties of electric field localization and selective absorption on light of surface plasmon resonance (SPR), a tunable, multi-band and wide-angle perfect absorber based on crosshair-shaped graphene is devised by using the Finite Difference in Time Domain (FDTD) method. In this paper, the effects of chemical potential, relaxation time, and incident angle of light on the absorptivity of graphene are systematically discussed. The simulation experiment shows that there are two absorption peaks with perfect absorption rate appeared in the study range, and the maximum modulation index can be obtained by changing the relaxation time. Finally, it proves that the absorber is insensitive to wide-angle of light. Thus, it is able to be concluded that the absorber has a great reference value to sensor, wireless communication, biomedical and other fields.

scholarly journals Broadband Absorber Using Ultra-thin Plasmonic Metamaterials Nanostructure in the Visible and Near-Infrared Regions

2021 ◽  
Author(s):  
Ali Elrashidi
Keyword(s):  
Glass Substrate ◽  
Near Infrared ◽  
Incident Light ◽  
Polarization Angle ◽  
Perfect Absorber ◽  
Broadband Absorber ◽  
Absorption Bandwidth ◽  
Metal Insulator Metal ◽  
Silver Substrate ◽  
Unit Cell Dimensions

Abstract In this work, an ultra-thin plasmonic metamaterial nanostructure absorber is simulated using finite difference time domain method in the visible and near infrared regions. A metamaterial, metal-insulator-metal, of a periodic structure of titanium-silica cap mounted on a top of a silver substrate covered by glass substrate is introduced in this paper. The glass substrate is used to enhance the absorption bandwidth by 276%, from 510 nm to 1410 nm. An almost perfect absorber, over 90% of the incident light, has been obtained for wavelengths from 440 nm to 1850 nm which produces an absorption bandwidth of 1410 nm. The square base unit cell dimensions of the silver substrate and of the cap are simulated and found as 250 nm and 200 nm consequently. The effect of using different materials for the top of the cap and for the insulator are also tested. The considered materials are titanium, nickel, silver, aluminum, and gold; however, the insulators are silica, quartz, vanadium dioxide, methyl methacrylate, and aluminium dioxide. In addition, aluminium, silver, copper, and gold are then simulated as a substrate metal. The optimum structure, which produce the maximum absorber bandwidth, 1410 nm, with a higher absorption, over 90%, is Glass-Ti-SiO2-Ag. Finally, the absorption bandwidth is calculated using different polarization angle, from 100 to 700 with a step100.

Ultra-broadband perfect solar energy absorber based on tungsten ring arrays

2021 ◽  
Author(s):  
Yu Cheng ◽  
Min Xiong ◽  
Ming Chen ◽  
Shijie Deng ◽  
Houquan Liu ◽  
...  
Keyword(s):  
Solar Energy ◽  
Incident Angle ◽  
Resonance Effect ◽  
Absorption Efficiency ◽  
Energy Utilization ◽  
Polarization Angle ◽  
High Symmetry ◽  
Energy Absorber ◽  
Broadband Absorption ◽  
Metal Insulator Metal

Abstract Metamaterials play a crucial role in the research of broadband absorbers. In order to achieve broadband and efficient absorption of solar energy, a novel solar energy absorber based on tungsten ring array is proposed in this paper. The results of numerical analysis show that the absorption efficiency of the absorber is over 90%, the average absorption efficiency is 96.2%, and the absorption peak is 99.9% at 300 ~ 2000 nm. Broadband absorption can be attributed to the excitation of plasmon and Fabry-Perot resonance effect on the surface of metal-insulator-metal. In addition, thanks to the high symmetry of the structure, it is relatively independent of incident angle and polarization angle. In the future, the absorbent will have a promising application prospect in the fields of solar energy utilization, photothermal conversion and infrared detection.

Wide-band perfect optical absorption and photo-thermal effect for three-tier nanogate

2014 ◽  
Vol 28 (16) ◽  
pp. 1450135
Author(s):  
G. W. Cai ◽  
P. Ding ◽  
J. Q. Wang ◽  
E. J. Liang
Keyword(s):  
Thermal Imaging ◽  
Absorption Rate ◽  
Incident Angle ◽  
Thermal Characteristics ◽  
Wide Band ◽  
Perfect Absorber ◽  
Perfect Absorption ◽  
Cooling Method ◽  
Wide Absorption Band ◽  
Calculation Results

This paper designed a perfect optical absorber based on three-tier gate nanostructure, which shows a wide-band perfect absorption in the wavelength range of 200–560 nm as a transverse wave incidents to the nanostructure with the incident angle 35°< θ< 65°. When θ = 45°, a wide absorption band with the absorption rate more than 94% is observed, with the maximum of absorption rate reaching 99.3% at the wavelength of 430 nm. We also analyze the thermal characteristics of the perfect absorber. The band ranging from 560 nm to 1200 nm presents an increasing absorption rate with the increase of temperature. The calculation results of multi-physics analysis indicate that different cooling method causes different temperature distribution for the perfect absorber. This three-tier gate perfect absorber may find applications on broadband visible detectors, microbolometer and thermal imaging.

scholarly journals Si Substrate-Based Metamaterials for Ultrabroadband Perfect Absorption in Visible Regime

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Qi Han ◽  
Lei Jin ◽  
Yongqi Fu ◽  
Weixing Yu
Keyword(s):  
Incident Angle ◽  
Si Substrate ◽  
Perfect Absorption ◽  
Photonic Circuits ◽  
Si Photonics ◽  
Fabry Perot ◽  
Absorbing Property ◽  
Photonics Devices

We report the broadband efficient light absorbing property of a structure of quadrangular frustum pyramid array in visible regime. The structure can absorb light efficiently with an average absorptivity of 0.98 over the whole visible waveband. In addition, it is found that this kind of super light absorbing can maintain an average of 0.9 for a wide incident angle range. The perfect absorbing property of the metamaterial-based nanoring array is attributed to the effect of the Fabry-Perot resonance. The structure is possible to be used as a type of Si photonics devices in future photonic circuits.

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