Using High-k VPP Modes in Grating-Coupled Graphene-Based Hyperbolic Metamaterial for Tunable Sensor Design

10.36227/techrxiv.13619318.v2 ◽

2021 ◽

Author(s):

Md Zahurul Islam ◽

A.K.M. Hasibul Hoque ◽

Mashnoon Alam Sakib ◽

Ying Y. Tsui

Keyword(s):

Lattice Structure ◽

Structural Parameters ◽

Resonance Wavelength ◽

Multilayer Graphene ◽

Potential Candidate ◽

Sensor Design ◽

Hyperbolic Metamaterial ◽

Super Lattice ◽

Sensing Applications ◽

High K

Volume plasmon polariton (VPP), a high-k mode that arises due to the coupling between two even modes of adjacent layers of an hyperbolic metamaterial (HMM) configuration, is very difficult to be excited by using prism coupling technique due to huge wave-vector mismatch. In this work, we present a graphene-based HMM structure integrated with metal grating to facilitate excitation of VPP modes. A graphene HMM is composed of multilayer graphene super-lattice similar to metal-dielectric super-lattice structure. We report the analytical formulation of the dispersion relation and numerical results of the characteristics of the excited VPP modes for the proposed structure in the Terahertz region of the spectrum. The best achieved imaging resolution of our proposed structure is 15 nm when used as an infra-red imaging platform. As a sensing platform, a maximum sensitivity of 11,050 nm/RIU is achieved for this configuration. The tunability of the resonance wavelength with respect to the structural parameters of the device is also studied and confirmed. Such promising findings are expected to make the proposed structure with integrated excitation coupler a potential candidate for tunable sensor design for different nanophotonic applications, including imaging, and, biomedical and chemical sensing applications.

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Using High-k VPP Modes in Grating-Coupled Graphene-Based Hyperbolic Metamaterial for Tunable Sensor Design

10.36227/techrxiv.13619318 ◽

2021 ◽

Author(s):

Md Zahurul Islam ◽

A.K.M. Hasibul Hoque ◽

Mashnoon Alam Sakib ◽

Ying Y. Tsui

Keyword(s):

Lattice Structure ◽

Structural Parameters ◽

Resonance Wavelength ◽

Multilayer Graphene ◽

Potential Candidate ◽

Sensor Design ◽

Hyperbolic Metamaterial ◽

Super Lattice ◽

Sensing Applications ◽

High K

Volume plasmon polariton (VPP), a high-k mode that arises due to the coupling between two even modes of adjacent layers of an hyperbolic metamaterial (HMM) configuration, is very difficult to be excited by using prism coupling technique due to huge wave-vector mismatch. In this work, we present a graphene-based HMM structure integrated with metal grating to facilitate excitation of VPP modes. A graphene HMM is composed of multilayer graphene super-lattice similar to metal-dielectric super-lattice structure. We report the analytical formulation of the dispersion relation and numerical results of the characteristics of the excited VPP modes for the proposed structure in the Terahertz region of the spectrum. The best achieved imaging resolution of our proposed structure is 15 nm when used as an infra-red imaging platform. As a sensing platform, a maximum sensitivity of 11,050 nm/RIU is achieved for this configuration. The tunability of the resonance wavelength with respect to the structural parameters of the device is also studied and confirmed. Such promising findings are expected to make the proposed structure with integrated excitation coupler a potential candidate for tunable sensor design for different nanophotonic applications, including imaging, and, biomedical and chemical sensing applications.

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Using High-k VPP Modes in Grating-Coupled Graphene-Based Hyperbolic Metamaterial for Tunable Sensor Design

IEEE Sensors Journal ◽

10.1109/jsen.2021.3085711 ◽

2021 ◽

pp. 1-1

Author(s):

A.K.M. Hasibul Hoque ◽

Md Zahurul Islam ◽

Mashnoon Alam Sakib ◽

Ying Tsui

Keyword(s):

Sensor Design ◽

Hyperbolic Metamaterial ◽

High K

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A Numerical Investigation of a Plasmonic Sensor Based on a Metal-Insulator-Metal Waveguide for Simultaneous Detection of Biological Analytes and Ambient Temperature

Nanomaterials ◽

10.3390/nano11102551 ◽

2021 ◽

Vol 11 (10) ◽

pp. 2551

Author(s):

Nikolay L. Kazanskiy ◽

Svetlana N. Khonina ◽

Muhammad A. Butt ◽

Andrzej Kaźmierczak ◽

Ryszard Piramidowicz

Keyword(s):

Ambient Temperature ◽

Simultaneous Detection ◽

Resonance Wavelength ◽

Temperature Sensing ◽

Sensor Design ◽

Plasmonic Sensor ◽

Metal Insulator ◽

Sensing Applications ◽

Metal Insulator Metal ◽

Biological Analytes

A multipurpose plasmonic sensor design based on a metal-insulator-metal (MIM) waveguide is numerically investigated in this paper. The proposed design can be instantaneously employed for biosensing and temperature sensing applications. The sensor consists of two simple resonant cavities having a square and circular shape, with the side coupled to an MIM bus waveguide. For biosensing operation, the analytes can be injected into the square cavity while a thermo-optic polymer is deposited in the circular cavity, which provides a shift in resonance wavelength according to the variation in ambient temperature. Both sensing processes work independently. Each cavity provides a resonance dip at a distinct position in the transmission spectrum of the sensor, which does not obscure the analysis process. Such a simple configuration embedded in the single-chip can potentially provide a sensitivity of 700 nm/RIU and −0.35 nm/°C for biosensing and temperature sensing, respectively. Furthermore, the figure of merit (FOM) for the biosensing module and temperature sensing module is around 21.9 and 0.008, respectively. FOM is the ratio between the sensitivity of the device and width of the resonance dip. We suppose that the suggested sensor design can be valuable in twofold ways: (i) in the scenarios where the testing of the biological analytes should be conducted in a controlled temperature environment and (ii) for reducing the influence on ambient temperature fluctuations on refractometric measurements in real-time mode.

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Co3O4/TiO2 hetero-structure for methyl orange dye degradation

Water Science & Technology ◽

10.2166/wst.2018.383 ◽

2018 ◽

Vol 79 (5) ◽

pp. 947-957 ◽

Cited By ~ 7

Author(s):

Mahabubur Chowdhury ◽

Sarah Kapinga ◽

Franscious Cummings ◽

Veruscha Fester

Keyword(s):

Catalytic Activity ◽

Methyl Orange ◽

Environmental Remediation ◽

Metal Ion ◽

Dye Degradation ◽

Lattice Structure ◽

Host Lattice ◽

Commercial Application ◽

Potential Candidate ◽

Methyl Orange Degradation

Abstract Advanced oxidation processes based on sulphate radical generated by peroxymonosulphate (PMS) activation is a promising area for environmental remediation. One of the biggest drawbacks of heterogeneous PMS activation is catalyst instability and metal ion leaching. In this study, a simple organic binder mediated route was explored to substitute Ti4+ ions into the Co3O4 host lattice structure to create a Co-O-Ti bond to minimise cobalt leaching during methyl orange degradation. The catalyst was characterised by X-ray diffraction, and scanning and transmission electron microscopy. The as-prepared catalysts with Co3O4:TiO2 ratio of 70:30 exhibited minimal leaching (0.9 mg/L) compared to other ratios studied. However, the pristine Co3O4 exhibited highest catalytic activity (rate constant = 0.41 min−1) and leaching (26.7 mg/L) compared to composite material (70:30 Co3O4:TiO2). Interestingly, the morphology of the composite and leaching of Co2+ ions were found to be temperature dependent, as an optimum temperature ensured strong Co-O-Ti bond for prevention of Co2+ leaching. The classical quenching test was utilised to determine the presence and role of radical species on methyl orange degradation. The fabricated catalyst also exhibited good catalytic activity in degrading mixed dyes and good recyclability, making it a potential candidate for commercial application.

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Tunable Coupled-Resonator-Induced Transparency in a Photonic Crystal System Based on a Multilayer-Insulator Graphene Stack

Materials ◽

10.3390/ma11102042 ◽

2018 ◽

Vol 11 (10) ◽

pp. 2042 ◽

Cited By ~ 1

Author(s):

Hanqing Liu ◽

Jianfeng Tan ◽

Peiguo Liu ◽

Li-an Bian ◽

Song Zha

Keyword(s):

Photonic Crystal ◽

Optical Sensors ◽

Chemical Potential ◽

Structural Parameters ◽

Multilayer Graphene ◽

Crystal System ◽

Chemical Potentials ◽

Nonlinear Devices ◽

Induced Transparency ◽

Coupled Resonator

We achieve the effective modulation of coupled-resonator-induced transparency (CRIT) in a photonic crystal system which consists of photonic crystal waveguide (PCW), defect cavities, and a multilayer graphene-insulator stack (MGIS). Simulation results show that the wavelength of transparency window can be effectively tuned through varying the chemical potential of graphene in MGIS. The peak value of the CRIT effect is closely related to the structural parameters of our proposed system. Tunable Multipeak CRIT is also realized in the four-resonator-coupled photonic crystal system by modulating the chemical potentials of MGISs in different cavity units. This system paves a novel way toward multichannel-selective filters, optical sensors, and nonlinear devices.

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CRYSTAL STRUCTURE OF THE QUATERNARY SEMICONDUCTOR COMPOUND CuFeCrSe3

Periódico Tchê Química ◽

10.52571/ptq.v16.n32.2019.866_periodico32_pgs_848_853.pdf ◽

2019 ◽

Vol 16 (32) ◽

pp. 848-853

Author(s):

Gerzon E. DELGADO ◽

P. DELGADO-NIÑO ◽

P. GRIMA-GALLARDO

Keyword(s):

High Efficiency ◽

Rietveld Method ◽

Structural Parameters ◽

Secondary Phase ◽

Elemental Abundance ◽

Tetragonal Symmetry ◽

Potential Candidate ◽

Quaternary Compound ◽

Semiconductor Compound ◽

Semiconductor System

The compounds with ternary structures of the chalcopyrite family Cu-III-Se2 (III = Al, Ga, In, Cr) form a wide group of semiconductor materials with diverse optical and electrical properties, and the addition of FeSe binary compound produces alloys of the type (Cu-III-Se2)1-x(Fe-Se)x. These types of materials have received increasing attention as promising thermoelectric materials due to their high efficiency, tunable transport properties, high elemental abundance and low toxicity. This work aims to synthesize and characterize structurally a new material belonging to this semiconductor system with x = ½, the quaternary compound CuFeCrSe3. This material was prepared by the melt and anneal technique and its structure was refined from Xray powder diffraction pattern using the Rietveld method. The X-ray powder pattern was mainly composed of CuFeCrSe3 (79.1%) with CuCr2Se4 (20.9%) appearing as secondary phase. The principal phase crystallizes with tetragonal symmetry in the space group P 4 2c (Nº 112), Z = 1, with a = 5.5082(2) Å, c = 10.943(1) Å, V = 332.01(1) Å3. The refinement of 18 instrumental and structural parameters led to Rp = 8.8 %, Rwp = 9.1 %, Rexp = 7.8 % and S = 1.2. This material, belonging to the semiconductor system I-II-III-VI3, crystallizes with a CuFeInSe3-type structure in a normal adamantane-structure. CuFeCrSe3 is a new semiconductor compound, related to the superionic phase CuCrSe2, and can be considered as a potential candidate for mediumtemperature thermoelectric applications.

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Research of Super Lattice Structure Parameters in Alloys of Al-Li-Mg System

Materials Science Forum - Aluminium Alloys 2006 ◽

10.4028/0-87849-408-1.1907 ◽

2006 ◽

pp. 1907-1912

Author(s):

O.A. Setjukov ◽

I.N. Fridlyander ◽

V.F. Shamray

Keyword(s):

Lattice Structure ◽

Structure Parameters ◽

Super Lattice

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Large-Area Thermal Distribution Sensor Based on Multilayer Graphene Ink

Sensors ◽

10.3390/s20185188 ◽

2020 ◽

Vol 20 (18) ◽

pp. 5188

Author(s):

Tomi Koskinen ◽

Taneli Juntunen ◽

Ilkka Tittonen

Keyword(s):

Signal To Noise Ratio ◽

Graphene Film ◽

Multilayer Graphene ◽

Wearable Electronics ◽

Large Area ◽

Sensor Applications ◽

Thermal Distribution ◽

Sensing Applications ◽

Detection Of Objects ◽

Distribution Mapping

Emergent applications in wearable electronics require inexpensive sensors suited to scalable manufacturing. This work demonstrates a large-area thermal sensor based on distributed thermocouple architecture and ink-based multilayer graphene film. The proposed device combines the exceptional mechanical properties of multilayer graphene nanocomposite with the reliability and passive sensing performance enabled by thermoelectrics. The Seebeck coefficient of the spray-deposited films revealed an inverse thickness dependence with the largest value of 44.7 μV K−1 at 78 nm, which makes thinner films preferable for sensor applications. Device performance was demonstrated by touch sensing and thermal distribution mapping-based shape detection. Sensor output voltage in the latter application was on the order of 300 μV with a signal-to-noise ratio (SNR) of 35, thus enabling accurate detection of objects of different shapes and sizes. The results imply that films based on multilayer graphene ink are highly suitable to thermoelectric sensing applications, while the ink phase enables facile integration into existing fabrication processes.

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