scholarly journals Design and Fabrication of a Wavelength-Selective Near-Infrared Metasurface Emitter for a Thermophotovoltaic System

Micromachines ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 157 ◽  
Author(s):  
Atsushi Sakurai ◽  
Yuki Matsuno
Keyword(s):  
Near Infrared ◽  
Underlying Mechanism ◽  
Infrared Region ◽  
Spectral Emissivity ◽  
Metal Insulator ◽  
Metal Insulator Metal ◽  
Thermal Emitter ◽  
Wavelength Selectivity ◽  
Selective Thermal Emitter ◽  
Difference Time

In this study, a tungsten-SiO2-based metal–insulator–metal-structured metasurface for the thermal emitter of the thermophotovoltaic system was designed and fabricated. The proposed emitter was fabricated by applying the photolithography method. The fabricated emitter has high emissivity in the visible to near-infrared region and shows excellent wavelength selectivity. This spectral emissivity tendency agreed well with the result calculated by the finite-difference time-domain method. Additionally, the underlying mechanism of its emission was scrutinized. Study of the fabrication process and theoretical mechanisms of the emission, clarified in this research, will be fundamental to design the wavelength-selective thermal emitter.

scholarly journals Hyperspectral Molecular Orientation Mapping in Metamaterials

2021 ◽  
Vol 11 (4) ◽  
pp. 1544
Author(s):  
Meguya Ryu ◽  
Yoshiaki Nishijima ◽  
Shinya Morimoto ◽  
Naoki To ◽  
Tomoki Hashizume ◽  
...  
Keyword(s):  
Molecular Orientation ◽  
Field Enhancement ◽  
Chemical Mapping ◽  
Metal Insulator ◽  
Orientation Mapping ◽  
Metal Insulator Metal ◽  
Finger Printing ◽  
Thermal Emitter ◽  
Ir Bands ◽  
Sub Wavelength

The four polarisation method is adopted for measurement of molecular orientation in dielectric nanolayers of metal-insulator-metal (MIM) metamaterials composed of gold nanodisks on polyimide and gold films. Hyperspectral mapping at the chemical finger printing spectral range of 4–20 μμm was carried out for MIM patterns of 1–2.5 μμm period (sub-wavelength). Overlay images taken at 0,π4,π2,3π4 orientation angles and subsequent baseline compensation are shown to be critically important for the interpretation of chemical mapping results and reduction of spurious artefacts. Light field enhancement in the 60-nm-thick polyimide (I in MIM) was responsible for strong absorption at the characteristic polyimide bands. Strong absorbance A at narrow IR bands can be used as a thermal emitter (emittance E=1−R), where R is the reflectance and A=1−R−T, where for optically thick samples the transmittance is T=0.

WAVELENGTH DEMULTIPLEXING IN METAL–INSULATOR–METAL PLASMONIC WAVEGUIDES

2014 ◽  
Vol 28 (04) ◽  
pp. 1450025 ◽  
Author(s):  
XIANKUN YAO
Keyword(s):  
Transmission Efficiency ◽  
Plasmonic Waveguides ◽  
Metal Insulator ◽  
Metal Insulator Metal ◽  
Integrated Optical ◽  
Potential Applications ◽  
Wavelength Demultiplexing ◽  
Optical Circuits ◽  
Difference Time ◽  
Mim Waveguide

In this paper, we have numerically investigated a novel kind of ultra-compact wavelength demultiplexing (WDM) in high-confined metal–insulator–metal (MIM) plasmonic waveguides. It is found that the drop transmission efficiency of the filtering cavity can be strongly enhanced by introducing a side-coupled cavity in the MIM waveguide. The theoretical analysis is verified by the finite-difference time-domain simulations. Through cascading the filtering units, a highly effective triple-wavelength demultiplexer is proposed by selecting the specific separation between the two coupled cavities of filtering units. Our results may find potential applications for the nanoscale WDM systems in highly integrated optical circuits and networks.

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

A New Plasmonic Filter through Double Metal Films Perforated with Rectangular Grooves and Circular Holes

2014 ◽  
Vol 548-549 ◽  
pp. 389-392 ◽  
Author(s):  
Xiang Nan Zhang ◽  
Gui Qiang Liu ◽  
Ying Hu ◽  
Yuan Hao Chen ◽  
Zheng Jie Cai ◽  
...  
Keyword(s):  
Optoelectronic Devices ◽  
Peak Position ◽  
Metal Films ◽  
Absorbing Boundary ◽  
Metal Insulator ◽  
Passband Filter ◽  
Metal Insulator Metal ◽  
Potential Applications ◽  
Circular Holes ◽  
Difference Time

A novel plasmonic passband filter consisting of metal-insulator-metal perforated with an array of rectangular grooves and circular holes is proposed and demonstrated. The transmission property of the proposed structure is obtained by employing the finite difference time domain with perfectly matched layer absorbing boundary condition. The result reveals that a passband with high transmission can be achieved. And the transmission peak position can be efficiently tuned by changing the factors of the structure, such as the sizes of circular holes and grooves. The proposed filter has potential applications for integrated optoelectronic devices due to its miniaturized size.

scholarly journals Research on Fano Resonance Sensing Characteristics Based on Racetrack Resonant Cavity

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1359
Author(s):  
Yaxin Yu ◽  
Jiangong Cui ◽  
Guochang Liu ◽  
Rongyu Zhao ◽  
Min Zhu ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Fano Resonance ◽  
Near Infrared ◽  
Resonant Cavity ◽  
High Sensitivity ◽  
Infrared Region ◽  
Optical Integrated Circuits ◽  
Element Simulation ◽  
Metal Insulator Metal ◽  
Sensing Characteristics

To reduce the loss of the metal–insulator–metal waveguide structure in the near-infrared region, a plasmonic nanosensor structure based on a racetrack resonant cavity is proposed herein. Through finite element simulation, the transmission spectra of the sensor under different size parameters were analyzed, and its influence on the sensing characteristics of the system was examined. The analysis results show that the structure can excite the double Fano resonance, which has a distinctive dependence on the size parameters of the sensor. The position and line shape of the resonance peak can be adjusted by changing the key parameters. In addition, the sensor has a higher sensitivity, which can reach 1503.7 nm/RIU when being used in refractive index sensing; the figure of merit is 26.8, and it can reach 0.75 nm/°C when it is used in temperature sensing. This structure can be used in optical integrated circuits, especially high-sensitivity nanosensors.

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 Analysis of Filter and Waveguide Effect Based on the MIM Nanodisk with a Metallic Block

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Xiang Zhai ◽  
Yuanyuan Liu ◽  
Hongju Li ◽  
Rexidaiguli Wujiaihemaiti ◽  
Yanhua Zhu ◽  
...  
Keyword(s):  
Blue Shift ◽  
Index Method ◽  
Optical Filtering ◽  
Metal Insulator ◽  
Effective Index Method ◽  
Resonant Modes ◽  
Metal Insulator Metal ◽  
Potential Applications ◽  
Bend Waveguide ◽  
Difference Time

A novel and meaningful plasmonic filter based on the metal-insulator-metal (MIM) waveguides directly connected to a nanocavity with a metallic block is proposed and demonstrated numerically. By the effective index method and the resonant theory of disk-shaped nanocavity, we reveal that the resonant wavelengths can be simply tuned by adjusting the height of the block, which is in accordance with the results calculated by finite-difference time-domain (FDTD) simulations. We also rotate the metallic block to achieve two resonant modes. One mode shows a blue shift, and the other mode shows a red shift. It is shown that the proposed structure performs as a bend waveguide not a filter when the width of the block increases to hundreds of nanometers. The proposed structure will have significant potential applications in nanointegrated circuits for optical filtering and processing.

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