scholarly journals Detailed Experiment-Theory Comparison of Mid-Infrared Metasurface Perfect Absorbers

Micromachines ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 409 ◽  
Author(s):  
Naoki To ◽  
Saulius Juodkazis ◽  
Yoshiaki Nishijima
Keyword(s):  
Metal Alloys ◽  
Perfect Absorber ◽  
Film Properties ◽  
Perfect Absorption ◽  
Metal Insulator ◽  
High Entropy ◽  
Sensor Applications ◽  
Metal Insulator Metal ◽  
Theory Comparison ◽  
Range Of Variation

Realisation of a perfect absorber A = 1 with transmittance and reflectance T = R = 0 by a thin metasurface is one of the hot topics in recent nanophotonics prompted by energy harvesting and sensor applications ( A + R + T = 1 is the energy conservation). Here we tested the optical properties of over 400 structures of metal–insulator–metal (MIM) metasurfaces for a range of variation in thickness of insulator, diameter of a disc and intra-disc distance both experimentally and numerically. Conditions of a near perfect absorption A > 95 % with simultaneously occurring anti-reflection property ( R < 5 % ) was experimentally determined. Differences between the bulk vs. nano-thin film properties at mid-IR of the used materials can be of interest for plasmonic multi-metal alloys and high entropy metals.

scholarly journals Detailed Experiment-Theory Comparison of Mid-Infrared Metasurface Perfect Absorbers

2020 ◽  
Author(s):  
Naoki To ◽  
Saulius Juodkazis ◽  
Yoshiaki Nishijima
Keyword(s):  
Metal Alloys ◽  
Perfect Absorber ◽  
Film Properties ◽  
Perfect Absorption ◽  
Metal Insulator ◽  
High Entropy ◽  
Sensor Applications ◽  
Metal Insulator Metal ◽  
Theory Comparison ◽  
Range Of Variation

The realization of a perfect absorber A = 1 with transmittance and reflectance T=R=0 by a thin metasurface is one of the hot topics in recent nanophotonics prompted by energy harvesting and sensor applications (A + R + T =1 is the energy conservation). Here we tested optical properties of over 400 structures of metal-insulator-metal (MIM) metasurfaces for a range of variation in thickness of insulator, the diameter of a disc and intra-disc distance experimentally and numerically. Conditions of a near-perfect absorption A &gt; 95% with simultaneously occurring anti-reflection property (R &lt; 5%) were experimentally determined. Differences between the bulk vs. nano-thin film properties at mid-IR of the used materials can be of interest for plasmonic multi-metal alloys and high entropy metals.

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 Near-infrared coherent perfect absorption in plasmonic metal-insulator-metal waveguide

2015 ◽  
Vol 23 (19) ◽  
pp. 24464 ◽  
Author(s):  
Hyeonsoo Park ◽  
Seong-Yeol Lee ◽  
Joonsoo Kim ◽  
Byoungho Lee ◽  
Hwi Kim
Keyword(s):  
Near Infrared ◽  
Perfect Absorption ◽  
Metal Insulator ◽  
Coherent Perfect Absorption ◽  
Metal Waveguide ◽  
Metal Insulator Metal

Large Area, Aluminum Metal-Insulator-Metal Infrared Perfect Absorber

2014 ◽  
Author(s):  
Thang Duy Dao ◽  
Kai Chen ◽  
Satoshi Ishii ◽  
Gandham Lakshminarayana ◽  
Akihiko Ohi ◽  
...  
Keyword(s):  
Perfect Absorber ◽  
Large Area ◽  
Metal Insulator ◽  
Aluminum Metal ◽  
Metal Insulator Metal

Achieving the polarization-manipulated multispectral perfect absorption and sensitive sensing via a metal/insulator/metal elliptical nanocavity array

2020 ◽  
Vol 27 (4) ◽  
pp. 346-351 ◽  
Author(s):  
Wenjuan Cai ◽  
Yingcong Zhang ◽  
Shihua Cai ◽  
Xianping Wang ◽  
Jian Wu ◽  
...  
Keyword(s):  
Perfect Absorption ◽  
Metal Insulator ◽  
Metal Insulator Metal

scholarly journals Ultrathin and Electrically Tunable Metamaterial with Nearly Perfect Absorption in Mid-Infrared

2019 ◽  
Vol 9 (16) ◽  
pp. 3358 ◽  
Author(s):  
Yuexin Zou ◽  
Jun Cao ◽  
Xue Gong ◽  
Ruijie Qian ◽  
Zhenghua An
Keyword(s):  
Resonant Mode ◽  
Infrared Region ◽  
Perfect Absorber ◽  
Geometrical Structures ◽  
Material Loss ◽  
Absorption Region ◽  
Perfect Absorption ◽  
Mid Infrared ◽  
Wide Range ◽  
Metal Insulator Metal

Metamaterials integrated with graphene exhibit tremendous freedom in tailoring their optical properties, particularly in the infrared region, and are desired for a wide range of applications, such as thermal imaging, cloaking, and biosensing. In this article, we numerically and experimentally demonstrate an ultrathin (total thickness < λ 0 / 15 ) and electrically tunable mid-infrared perfect absorber based on metal–insulator–metal (MIM) structured metamaterials. The Q-values of the absorber can be tuned through two rather independent parameters, with geometrical structures of metamaterials tuning radiation loss (Qr) of the system and the material loss (tanδ) to further change mainly the intrinsic loss (Qa). This concise mapping of the structural and material properties to resonant mode loss channels enables a two-stage optimization for real applications: geometrical design before fabrication and then electrical tuning as a post-fabrication and fine adjustment knob. As an example, our device demonstrates an electrical and on-site tuning of ~5 dB change in absorption near the perfect absorption region. Our work provides a general guideline for designing and realizing tunable infrared devices and may expand the applications of perfect absorbers for mid-infrared sensors, absorbers, and detectors in extreme spatial-limited circumstances.

scholarly journals An Electrically Tunable Dual-Wavelength Refractive Index Sensor Based on a Metagrating Structure Integrating Epsilon-Near-Zero Materials

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2301
Author(s):  
Zhenya Meng ◽  
Hailin Cao ◽  
Run Liu ◽  
Xiaodong Wu
Keyword(s):  
Refractive Index ◽  
Indium Tin Oxide ◽  
Figure Of Merit ◽  
Refractive Index Sensor ◽  
Perfect Absorption ◽  
Metal Insulator ◽  
Sensing Platform ◽  
Highly Sensitive ◽  
Metal Insulator Metal ◽  
Epsilon Near Zero

In this paper, a reconfigurable sensing platform based on an asymmetrical metal-insulator-metal stacked structure integrating an indium tin oxide (ITO) ultrathin film is proposed and investigated numerically. The epsilon-near-zero (ENZ) mode and antisymmetric mode can be resonantly excited, generating near-perfect absorption of over 99.7% at 1144 and 1404 nm, respectively. The absorptivity for the ENZ mode can be modulated from 90.2% to 98.0% by varying the ENZ wavelength of ITO by applying different voltages. To obtain a highly sensitive biosensor, we show that the proposed structure has a full-width at half-maximum (FWHM) of 8.65 nm and a figure-of-merit (FOM) of 24.7 with a sensitivity of 213.3 nm/RI (refractive index) for the glucose solution. Our proposed device has potential for developing tunable biosensors for real-time health monitoring.

scholarly journals Design of Plasmonic-Waveguiding Structures for Sensor Applications

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1227 ◽  
Author(s):  
Jaroslav Vlček ◽  
Jaromír Pištora ◽  
Michal Lesňák
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Sensing Element ◽  
Metal Insulator ◽  
Sensor Applications ◽  
Plasmonic Nanostructure ◽  
Model Study ◽  
Metal Insulator Metal ◽  
Complex Solutions ◽  
Optical Waveguiding

Surface plasmon resonance has become a widely accepted optical technique for studying biological and chemical interactions. Among others, detecting small changes in analyte concentration in complex solutions remains challenging, e.g., because of the need of distinguishing the interaction of interest from other effects. In our model study, the resolution ability of plasmonic sensing element was enhanced by two ways. Besides an implementation of metal-insulator-metal (MIM) plasmonic nanostructure, we suggest concatenation with waveguiding substructure to achieve mutual coupling of surface plasmon polariton (SPP) with an optical waveguiding mode. The dependence of coupling conditions on the multilayer parameters was analyzed to obtain optimal field intensity enhancement.

scholarly journals A Narrow-Band Multi-Resonant Metamaterial in Near-IR

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5140
Author(s):  
Farhan Ali ◽  
Serap Aksu
Keyword(s):  
Cross Sections ◽  
Narrow Band ◽  
Near Field ◽  
Impedance Matching ◽  
Perfect Absorber ◽  
Refractive Index Sensitivity ◽  
Perfect Absorption ◽  
Metal Insulator Metal ◽  
Index Sensitivity ◽  
Scattering Cross Sections

We theoretically investigate a multi-resonant plasmonic metamaterial perfect absorber operating between 600 and 950 nm wavelengths. The presented device generates 100% absorption at two resonance wavelengths and delivers an ultra-narrow band (sub-20 nm) and high quality factor (Q=44) resonance. The studied perfect absorber is a metal–insulator–metal configuration where a thin MgF2 spacer is sandwiched between an optically thick gold layer and uniformly patterned gold circular nanodisc antennas. The localized and propagating nature of the plasmonic resonances are characterized and confirmed theoretically. The origin of the perfect absorption is investigated using the impedance matching and critical coupling phenomenon. We calculate the effective impedance of the perfect absorber and confirm the matching with the free space impedance. We also investigate the scattering properties of the top antenna layer and confirm the minimized reflection at resonance wavelengths by calculating the absorption and scattering cross sections. The excitation of plasmonic resonances boost the near-field intensity by three orders of magnitude which enhances the interaction between the metamaterial surface and the incident energy. The refractive index sensitivity of the perfect absorber could go as high as S=500 nm/RIU. The presented optical characteristics make the proposed narrow-band multi-resonant perfect absorber a favorable platform for biosensing and contrast agent based bioimaging.

Sign in / Sign up

Export Citation Format

Share Document