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An optically tunable perfect light absorber as a refractive index (RI) metamaterial (MM) nanobiosensor (NBS) is designed for sensing chemicals, monitoring the concentration of water-soluble glucose, and detecting viruses. This plasmon induced tunable metasurface works based on multiband super-absorption in the infrared frequency regime. It consists of a metal mirror that facilitates the MM to work as an absorber where the metal pattern at the top layer creates an enhanced evanescent wave that facilitates the metasurface to work as a RI optical sensor. The modelling and numerical analysis are carried out using Finite Difference Time Domain (FDTD) method-based software, CST microwave studio where a genetic algorithm (GA) is used to optimize the geometric parameters. We demonstrate multiband super-absorption spectra having maximum absorption of more than 99%. Furthermore, we show how the multiband super-absorber nanostructure can be used as a RI NBS, where the resonance frequency shifts with the RI of the surrounding medium. The achieved opto-chemical sensitivity is approximately 65 nm/RIU, the bio-optical sensitivity to detect viruses is approximately 76 nm/RIU; and the optical sensitivity of the water-soluble glucose concentration is about 300 nm/RIU; all sensitivities are comparable in comparison with the reported values in the literature.
Zohreh Vafapour; Hossain Ghahraloud; Afsaneh Keshavarz; Saiful Islam; Ali Rashidi; Mitra Dutta; Michael A. Stroscio. The Potential of Refractive Index Nanobiosensing Using a Multi-Band Optically Tuned Perfect Light Metamaterial Absorber. IEEE Sensors Journal 2021, 21, 13786 -13793.
AMA StyleZohreh Vafapour, Hossain Ghahraloud, Afsaneh Keshavarz, Saiful Islam, Ali Rashidi, Mitra Dutta, Michael A. Stroscio. The Potential of Refractive Index Nanobiosensing Using a Multi-Band Optically Tuned Perfect Light Metamaterial Absorber. IEEE Sensors Journal. 2021; 21 (12):13786-13793.
Chicago/Turabian StyleZohreh Vafapour; Hossain Ghahraloud; Afsaneh Keshavarz; Saiful Islam; Ali Rashidi; Mitra Dutta; Michael A. Stroscio. 2021. "The Potential of Refractive Index Nanobiosensing Using a Multi-Band Optically Tuned Perfect Light Metamaterial Absorber." IEEE Sensors Journal 21, no. 12: 13786-13793.
Note: In lieu of an abstract, this is an excerpt from the first page. This paper
Jakeya Sultana; Saiful Islam; Cristiano M. B. Cordeiro; Alex Dinovitser; Mayank Kaushik; Brian W.-H. Ng; Derek Abbott. Addendum: Sultana, J., et al. Terahertz Hollow Core Antiresonant Fiber with Metamaterial Cladding. Fibers 2020, 8, 14. Fibers 2021, 9, 20 .
AMA StyleJakeya Sultana, Saiful Islam, Cristiano M. B. Cordeiro, Alex Dinovitser, Mayank Kaushik, Brian W.-H. Ng, Derek Abbott. Addendum: Sultana, J., et al. Terahertz Hollow Core Antiresonant Fiber with Metamaterial Cladding. Fibers 2020, 8, 14. Fibers. 2021; 9 (3):20.
Chicago/Turabian StyleJakeya Sultana; Saiful Islam; Cristiano M. B. Cordeiro; Alex Dinovitser; Mayank Kaushik; Brian W.-H. Ng; Derek Abbott. 2021. "Addendum: Sultana, J., et al. Terahertz Hollow Core Antiresonant Fiber with Metamaterial Cladding. Fibers 2020, 8, 14." Fibers 9, no. 3: 20.
M.S. Islam; J. Sultana; M. Biabanifard; Z. Vafapour; M.J. Nine; A. Dinovitser; C.M.B. Cordeiro; B.W.-H. Ng; D. Abbott. Corrigendum to “Tunable localized surface plasmon graphene metasurface for multiband superabsorption and terahertz sensing” [Carbon (2020) 559–567]. Carbon 2021, 174, 770 .
AMA StyleM.S. Islam, J. Sultana, M. Biabanifard, Z. Vafapour, M.J. Nine, A. Dinovitser, C.M.B. Cordeiro, B.W.-H. Ng, D. Abbott. Corrigendum to “Tunable localized surface plasmon graphene metasurface for multiband superabsorption and terahertz sensing” [Carbon (2020) 559–567]. Carbon. 2021; 174 ():770.
Chicago/Turabian StyleM.S. Islam; J. Sultana; M. Biabanifard; Z. Vafapour; M.J. Nine; A. Dinovitser; C.M.B. Cordeiro; B.W.-H. Ng; D. Abbott. 2021. "Corrigendum to “Tunable localized surface plasmon graphene metasurface for multiband superabsorption and terahertz sensing” [Carbon (2020) 559–567]." Carbon 174, no. : 770.
Fig. 4 in reference [1] is after [2] .
Saiful Islam; Cristiano M. B. Cordeiro; J. Nine; Jakeya Sultana; Alice L. S. Cruz; Alex Dinovitser; Brian Wai-Him Ng; Heike Ebendorff-Heidepriem; Dusan Losic; Derek Abbott. Correction to: “Experimental Study on Glass and Polymers: Determining the Optimal Material for Potential Use in Terahertz Technology”. IEEE Access 2021, 9, 2705 -2705.
AMA StyleSaiful Islam, Cristiano M. B. Cordeiro, J. Nine, Jakeya Sultana, Alice L. S. Cruz, Alex Dinovitser, Brian Wai-Him Ng, Heike Ebendorff-Heidepriem, Dusan Losic, Derek Abbott. Correction to: “Experimental Study on Glass and Polymers: Determining the Optimal Material for Potential Use in Terahertz Technology”. IEEE Access. 2021; 9 ():2705-2705.
Chicago/Turabian StyleSaiful Islam; Cristiano M. B. Cordeiro; J. Nine; Jakeya Sultana; Alice L. S. Cruz; Alex Dinovitser; Brian Wai-Him Ng; Heike Ebendorff-Heidepriem; Dusan Losic; Derek Abbott. 2021. "Correction to: “Experimental Study on Glass and Polymers: Determining the Optimal Material for Potential Use in Terahertz Technology”." IEEE Access 9, no. : 2705-2705.
A hollow core antiresonant photonic crystal fiber (HC-ARPCF) is analyzed for terahertz applications. A numerical analysis of the proposed fiber is first carried out to minimize coupling between the core and cladding modes. The modeling of the scaled-up and inhibited coupling fiber is carried out by means of a Finite Element Method (FEM), which is then demonstrated using a Zeonex filament fiber, fabricated by fused deposition modeling (FDM) of 3D printing technology. The simulation is carried out to analyze both the transmission and possibility of refractometric sensing, whereas, the experimental analysis is carried out using terahertz time domain spectroscopy (THz-TDS), and supports our numerical findings, illustrating how the proposed fibers can be used for low loss transmission of terahertz waves. The simplicity of the proposed fiber structures facilitates fabrication for a number of different transmission and sensing applications in the terahertz range.
Jakeya Sultana; Saiful Islam; Cristiano M. B. Cordeiro; Selim Habib; Alex Dinovitser; Mayank Kaushik; Brian Wai-Him Ng; Heike Ebendorff-Heidepriem; Derek Abbott. Hollow Core Inhibited Coupled Antiresonant Terahertz Fiber: A Numerical and Experimental Study. IEEE Transactions on Terahertz Science and Technology 2020, 11, 245 -260.
AMA StyleJakeya Sultana, Saiful Islam, Cristiano M. B. Cordeiro, Selim Habib, Alex Dinovitser, Mayank Kaushik, Brian Wai-Him Ng, Heike Ebendorff-Heidepriem, Derek Abbott. Hollow Core Inhibited Coupled Antiresonant Terahertz Fiber: A Numerical and Experimental Study. IEEE Transactions on Terahertz Science and Technology. 2020; 11 (3):245-260.
Chicago/Turabian StyleJakeya Sultana; Saiful Islam; Cristiano M. B. Cordeiro; Selim Habib; Alex Dinovitser; Mayank Kaushik; Brian Wai-Him Ng; Heike Ebendorff-Heidepriem; Derek Abbott. 2020. "Hollow Core Inhibited Coupled Antiresonant Terahertz Fiber: A Numerical and Experimental Study." IEEE Transactions on Terahertz Science and Technology 11, no. 3: 245-260.
Hollow-core fibers are advantageous for chemical sensing as they facilitate liquid infiltration into the core over conventional porous core fiber. In addition, the requirement of less bulk material significantly decreases the effective material loss (EML). In this paper, a six circular cladding tube negative curvature hollow-core fiber (NC-HCF) is proposed for chemical sensing. Five different chemicals including chloroform, polylactic acid, CCL3, glycerin, and benzene are proposed to fill the core of the NC-HCF, and sensitivities are evaluated by full vector finite element method-based COMSOL software. Numerical results reveal that the proposed sensor exhibits very high relative sensitivity in a wide range of frequency. The fabrication of the proposed fiber is feasible by existing fabrication facilities as it contains realistic fabrication parameters. Hence, the proposed sensor can potentially be used as a chemical sensor especially in the medical, food, and industrial sectors as the five chemicals mentioned above carry great medical and food significance.
Istihad Mahmud Ankan; Aslam Mollah; Jakeya Sultana; Saiful Islam. Negative Curvature Hollow-core Anti-resonant Fiberfor Terahertz Sensing. Applied Optics 2020, 59, 8519 -8525.
AMA StyleIstihad Mahmud Ankan, Aslam Mollah, Jakeya Sultana, Saiful Islam. Negative Curvature Hollow-core Anti-resonant Fiberfor Terahertz Sensing. Applied Optics. 2020; 59 (28):8519-8525.
Chicago/Turabian StyleIstihad Mahmud Ankan; Aslam Mollah; Jakeya Sultana; Saiful Islam. 2020. "Negative Curvature Hollow-core Anti-resonant Fiberfor Terahertz Sensing." Applied Optics 59, no. 28: 8519-8525.
We propose and numerically analyze various hollow-core antiresonant fiber (HC-ARF) for operation at terahertz frequencies. We compare typical HC-ARF designs with nested and adjacent nested designs while analyzing performance in terms of loss and single-mode guidance of terahertz waves. With optimized fiber dimensions, the fundamental core mode, cladding mode, core higher-order modes (HOMs), and the angle dependence of adjacent tubes are analyzed to find the best design for low loss terahertz transmission. Analysis of the fiber designs shows that the nested tube-based antiresonant fiber exhibits lower transmission loss and superior HOM suppression, exceeding 140. The nested HC-ARF is feasible for fabrication using existing fabrication technologies and opening up the possibility of efficient transmission of terahertz waves.
Jakeya Sultana; Saiful Islam; Cristiano M. B. Cordeiro; Selim Habib; Alex Dinovitser; Brian Wai-Him Ng; Derek Abbott. Exploring Low Loss and Single Mode in Antiresonant Tube Lattice Terahertz Fibers. IEEE Access 2020, 8, 113309 -113317.
AMA StyleJakeya Sultana, Saiful Islam, Cristiano M. B. Cordeiro, Selim Habib, Alex Dinovitser, Brian Wai-Him Ng, Derek Abbott. Exploring Low Loss and Single Mode in Antiresonant Tube Lattice Terahertz Fibers. IEEE Access. 2020; 8 ():113309-113317.
Chicago/Turabian StyleJakeya Sultana; Saiful Islam; Cristiano M. B. Cordeiro; Selim Habib; Alex Dinovitser; Brian Wai-Him Ng; Derek Abbott. 2020. "Exploring Low Loss and Single Mode in Antiresonant Tube Lattice Terahertz Fibers." IEEE Access 8, no. : 113309-113317.
The optical properties of polymers and glasses useful for terahertz applications are experimentally characterized using terahertz time-domain spectroscopy (THz-TDS). A standard system setup utilizing transmission spectroscopy is used to measure different optical properties of materials including refractive index, relative permittivity, loss tangent, absorption coefficient, and transmittance. The thermal and chemical dependencies of materials are also studied to identify the appropriate materials for given terahertz applications. The selected materials can then be utilized for applications such as in waveguides, filters, lenses, polarization preserving devices, metamaterials and metasurfaces, absorbers, and sensors in the terahertz frequency range.
Saiful Islam; Cristiano M. B. Cordeiro; M. J. Nine; Jakeya Sultana; Alice L. S. Cruz; Alex Dinovitser; Brian Wai-Him Ng; Heike Ebendorff-Heidepriem; Dusan Losic; Derek Abbott. Experimental Study on Glass and Polymers: Determining the Optimal Material for Potential Use in Terahertz Technology. IEEE Access 2020, 8, 97204 -97214.
AMA StyleSaiful Islam, Cristiano M. B. Cordeiro, M. J. Nine, Jakeya Sultana, Alice L. S. Cruz, Alex Dinovitser, Brian Wai-Him Ng, Heike Ebendorff-Heidepriem, Dusan Losic, Derek Abbott. Experimental Study on Glass and Polymers: Determining the Optimal Material for Potential Use in Terahertz Technology. IEEE Access. 2020; 8 (99):97204-97214.
Chicago/Turabian StyleSaiful Islam; Cristiano M. B. Cordeiro; M. J. Nine; Jakeya Sultana; Alice L. S. Cruz; Alex Dinovitser; Brian Wai-Him Ng; Heike Ebendorff-Heidepriem; Dusan Losic; Derek Abbott. 2020. "Experimental Study on Glass and Polymers: Determining the Optimal Material for Potential Use in Terahertz Technology." IEEE Access 8, no. 99: 97204-97214.
Lying between optical and microwave ranges, the terahertz band in the electromagnetic spectrum is attracting increased attention. Optical fibers are essential for developing the full potential of complex terahertz systems. In this manuscript, we review the optimal materials, the guiding mechanisms, the fabrication methodologies, the characterization methods and the applications of such terahertz waveguides. We examine various optical fiber types including tube fibers, solid core fiber, hollow-core photonic bandgap, anti-resonant fibers, porous-core fibers, metamaterial-based fibers, and their guiding mechanisms. The optimal materials for terahertz applications are discussed. The past and present trends of fabrication methods, including drilling, stacking, extrusion and 3D printing, are elaborated. Fiber characterization methods including different optics for terahertz time-domain spectroscopy (THz-TDS) setups are reviewed and application areas including short-distance data transmission, imaging, sensing, and spectroscopy are discussed.
Saiful Islam; Cristiano M. B. Cordeiro; Marcos A. R. Franco; Jakeya Sultana; Alice L. S. Cruz; Derek Abbott. Terahertz optical fibers [Invited]. Optics Express 2020, 28, 16089 -16117.
AMA StyleSaiful Islam, Cristiano M. B. Cordeiro, Marcos A. R. Franco, Jakeya Sultana, Alice L. S. Cruz, Derek Abbott. Terahertz optical fibers [Invited]. Optics Express. 2020; 28 (11):16089-16117.
Chicago/Turabian StyleSaiful Islam; Cristiano M. B. Cordeiro; Marcos A. R. Franco; Jakeya Sultana; Alice L. S. Cruz; Derek Abbott. 2020. "Terahertz optical fibers [Invited]." Optics Express 28, no. 11: 16089-16117.
A hollow core antiresonant photonic crystal fiber (HC-ARPCF) with metal inclusions is numerically analyzed for transmission of terahertz (THz) waves. The propagation of fundamental and higher order modes are investigated and the results are compared with conventional dielectric antiresonant (AR) fiber designs. Simulation results show that broadband terahertz radiation can be guided with six times lower loss in such hollow core fibers with metallic inclusions, compared to tube lattice fiber, covering a single mode bandwidth (BW) of 700 GHz.
Jakeya Sultana; Saiful Islam; Cristiano M. B. Cordeiro; Alex Dinovitser; Mayank Kaushik; Brian W.-H. Ng; Derek Abbott. Terahertz Hollow Core Antiresonant Fiber with Metamaterial Cladding. Fibers 2020, 8, 14 .
AMA StyleJakeya Sultana, Saiful Islam, Cristiano M. B. Cordeiro, Alex Dinovitser, Mayank Kaushik, Brian W.-H. Ng, Derek Abbott. Terahertz Hollow Core Antiresonant Fiber with Metamaterial Cladding. Fibers. 2020; 8 (2):14.
Chicago/Turabian StyleJakeya Sultana; Saiful Islam; Cristiano M. B. Cordeiro; Alex Dinovitser; Mayank Kaushik; Brian W.-H. Ng; Derek Abbott. 2020. "Terahertz Hollow Core Antiresonant Fiber with Metamaterial Cladding." Fibers 8, no. 2: 14.
We propose a plasmon induced tunable metasurface for multiband superabsorption and terahertz sensing. It consists of a graphene sheet that facilitates perfect absorption where the graphene pattern at the top layer creates an enhanced evanescent wave that facilitates the metasurface to work as a sensor. The modelling and numerical analysis are carried out using Finite Element Method (FEM) based software, CST microwave studio where a genetic algorithm (GA) is used to optimize the geometric parameters, and metasurface tunability is achieved via an external gate voltage on the graphene. By exploiting graphene’s tunable properties we demonstrate a multiband superabsorption spectra having a maximum absorption of 99.7% in a frequency range of 0.1–2.0 THz that also maintain unique optical performance over a wide incidence angle. Further results show how the superabsorber can be used as a sensor, where the resonance frequency shifts with the refractive index of the surrounding environment.
M.S. Islam; J. Sultana; M. Biabanifard; Z. Vafapour; Julker Nine; A. Dinovitser; C.M.B. Cordeiro; Brian Ng; D. Abbott. Tunable localized surface plasmon graphene metasurface for multiband superabsorption and terahertz sensing. Carbon 2019, 158, 559 -567.
AMA StyleM.S. Islam, J. Sultana, M. Biabanifard, Z. Vafapour, Julker Nine, A. Dinovitser, C.M.B. Cordeiro, Brian Ng, D. Abbott. Tunable localized surface plasmon graphene metasurface for multiband superabsorption and terahertz sensing. Carbon. 2019; 158 ():559-567.
Chicago/Turabian StyleM.S. Islam; J. Sultana; M. Biabanifard; Z. Vafapour; Julker Nine; A. Dinovitser; C.M.B. Cordeiro; Brian Ng; D. Abbott. 2019. "Tunable localized surface plasmon graphene metasurface for multiband superabsorption and terahertz sensing." Carbon 158, no. : 559-567.
Many physical systems can be adequately modelled using a second-order approximation. Thus, the problem of system identification often reduces to the problem of estimating the position of a single pair of complex–conjugate poles. This paper presents a convenient but approximate technique for the estimation of the position of a single pair of complex–conjugate poles, using the moment of velocity (MoV). The MoV is a Hilbert transform based signal processing tool that addresses the shortcomings of instantaneous frequency. We demonstrate that the MoV can be employed for parameter identification of a dynamical system. We estimate the damping coefficient and oscillation frequency via MoV of the impulse response.
M. Dorraki; M. S. Islam; A. Allison; D. Abbott. Parameter identification using moment of velocity. Royal Society Open Science 2019, 6, 190671 .
AMA StyleM. Dorraki, M. S. Islam, A. Allison, D. Abbott. Parameter identification using moment of velocity. Royal Society Open Science. 2019; 6 (11):190671.
Chicago/Turabian StyleM. Dorraki; M. S. Islam; A. Allison; D. Abbott. 2019. "Parameter identification using moment of velocity." Royal Society Open Science 6, no. 11: 190671.
As Noncommunicable Diseases (NCDs) are affected or controlled by diverse factors such as age, regionalism, timeliness or seasonality, they are always challenging to be treated accurately, which has impacted on daily life and work of patients. Unfortunately, although a number of researchers have already made some achievements (including clinical or even computer-based) on certain diseases, current situation is eager to be improved via computer technologies such as data mining and Deep Learning. In addition, the progress of NCD research has been hampered by privacy of health and medical data. In this paper, a hierarchical idea has been proposed to study the effects of various factors on diseases, and a data-driven framework named d-DC with good extensibility is presented. d-DC is able to classify the disease according to the occupation on the premise where the disease is occurring in a certain region. During collecting data, we used a combination of personal or family medical records and traditional methods to build a data acquisition model. Not only can it realize automatic collection and replenishment of data, but it can also effectively tackle the cold start problem of the model with relatively few data effectively. The diversity of information gathering includes structured data and unstructured data (such as plain texts, images or videos), which contributes to improve the classification accuracy and new knowledge acquisition. Apart from adopting machine learning methods, d-DC has employed knowledge graph (KG) to classify diseases for the first time. The vectorization of medical texts by using knowledge embedding is a novel consideration in the classification of diseases. When results are singular, the medical expert system was proposed to address inconsistencies through knowledge bases or online experts. The results of d-DC are displayed by using a combination of KG and traditional methods, which intuitively provides a reasonable interpretation to the results (highly descriptive). Experiments show that d-DC achieved the improved accuracy than the other previous methods. Especially, a fusion method called RKRE based on both ResNet and the expert system attained an average correct proportion of 86.95%, which is a good feasibility study in the field of disease classification.
Zhenfeng Lei; Yuan Sun; Y.A. Nanehkaran; Shuangyuan Yang; Saiful Islam; Huiqing Lei; Defu Zhang. A novel data-driven robust framework based on machine learning and knowledge graph for disease classification. Future Generation Computer Systems 2019, 102, 534 -548.
AMA StyleZhenfeng Lei, Yuan Sun, Y.A. Nanehkaran, Shuangyuan Yang, Saiful Islam, Huiqing Lei, Defu Zhang. A novel data-driven robust framework based on machine learning and knowledge graph for disease classification. Future Generation Computer Systems. 2019; 102 ():534-548.
Chicago/Turabian StyleZhenfeng Lei; Yuan Sun; Y.A. Nanehkaran; Shuangyuan Yang; Saiful Islam; Huiqing Lei; Defu Zhang. 2019. "A novel data-driven robust framework based on machine learning and knowledge graph for disease classification." Future Generation Computer Systems 102, no. : 534-548.
Mohammad Rakibul Islam; Faiyaz Kabir; Khandoker Md. Abu Talha; Saiful Islam. A novel hollow core terahertz refractometric sensor. Sensing and Bio-Sensing Research 2019, 25, 1 .
AMA StyleMohammad Rakibul Islam, Faiyaz Kabir, Khandoker Md. Abu Talha, Saiful Islam. A novel hollow core terahertz refractometric sensor. Sensing and Bio-Sensing Research. 2019; 25 ():1.
Chicago/Turabian StyleMohammad Rakibul Islam; Faiyaz Kabir; Khandoker Md. Abu Talha; Saiful Islam. 2019. "A novel hollow core terahertz refractometric sensor." Sensing and Bio-Sensing Research 25, no. : 1.
The optical properties of polymers and glasses of interests are experimentally characterized using terahertz time domain spectroscopy (THz-TDS). Transmission spectroscopy are used to extract the dielectric properties of Topas (cyclic olefin copolymer), Zeonex (Cyclo-olefin polymer), Polytetrafluoroethylene (Teflon), high-density polyethylene (HDPE), Polymethyl methacrylate (PMMA), Silica, BK7, Duran and UV-Resin in the terahertz band.
Saiful Islam; J. Sultana; Cristiano. M. B. Cordeiro; Alice. L. S Cruz; A. Dinovitser; B. W.-H. Ng; Derek Abbott. Broadband Characterization of Glass and Polymer Materials Using THz-TDS. 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) 2019, 1 -2.
AMA StyleSaiful Islam, J. Sultana, Cristiano. M. B. Cordeiro, Alice. L. S Cruz, A. Dinovitser, B. W.-H. Ng, Derek Abbott. Broadband Characterization of Glass and Polymer Materials Using THz-TDS. 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). 2019; ():1-2.
Chicago/Turabian StyleSaiful Islam; J. Sultana; Cristiano. M. B. Cordeiro; Alice. L. S Cruz; A. Dinovitser; B. W.-H. Ng; Derek Abbott. 2019. "Broadband Characterization of Glass and Polymer Materials Using THz-TDS." 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) , no. : 1-2.
A silicon based high core power fraction photonic crystal fiber is proposed in this study. To design the proposed fiber Finite Element Method is used. A perfectly matched layer is also introduced in this design as a boundary condition. In our proposed fiber we have found confinement loss of 1.052 × 10 -15 cm -1 and effective material loss (EML) of 0.078 cm -1 at 1.0 THz frequency. In our proposed fiber we obtained high core power fraction and dispersion loss of around 0.84 ± 0.03 ps/THz/cm. The proposed fiber contains fewer amounts of air holes that make this design very simple. The fabrication possibility of this designed fiber is easy because of its simplicity.
Saiful Islam; Anwar Sadath; Shahadat Hossain; Sabbir Ahmed Khan; Chinmoy Das; Tanvir Ahmed. Low Loss High Core Power Fraction Silicon Based Photonic Crystal Fiber for Efficient Wave Propagation in THz Regime. 2019 5th International Conference on Advances in Electrical Engineering (ICAEE) 2019, 506 -509.
AMA StyleSaiful Islam, Anwar Sadath, Shahadat Hossain, Sabbir Ahmed Khan, Chinmoy Das, Tanvir Ahmed. Low Loss High Core Power Fraction Silicon Based Photonic Crystal Fiber for Efficient Wave Propagation in THz Regime. 2019 5th International Conference on Advances in Electrical Engineering (ICAEE). 2019; ():506-509.
Chicago/Turabian StyleSaiful Islam; Anwar Sadath; Shahadat Hossain; Sabbir Ahmed Khan; Chinmoy Das; Tanvir Ahmed. 2019. "Low Loss High Core Power Fraction Silicon Based Photonic Crystal Fiber for Efficient Wave Propagation in THz Regime." 2019 5th International Conference on Advances in Electrical Engineering (ICAEE) , no. : 506-509.
Anwar Sadath; Saiful Islam; Mohammad Faisal. Topas Based Low Loss Suspended Porous Core Single Mode Photonic Crystal Fiber for THz Wave Propagation. 2019 5th International Conference on Advances in Electrical Engineering (ICAEE) 2019, 1 .
AMA StyleAnwar Sadath, Saiful Islam, Mohammad Faisal. Topas Based Low Loss Suspended Porous Core Single Mode Photonic Crystal Fiber for THz Wave Propagation. 2019 5th International Conference on Advances in Electrical Engineering (ICAEE). 2019; ():1.
Chicago/Turabian StyleAnwar Sadath; Saiful Islam; Mohammad Faisal. 2019. "Topas Based Low Loss Suspended Porous Core Single Mode Photonic Crystal Fiber for THz Wave Propagation." 2019 5th International Conference on Advances in Electrical Engineering (ICAEE) , no. : 1.
We propose a novel low loss antiresonant (AR) terahertz fiber by means of a hollow core with metamaterial cladding. The propagation of fundamental and higher order modes are investigated using Finite Element Method (FEM) based software COMSOL, and the results are compared with standard AR fiber designs. Simulation results show that the novel metamaterial structure exhibits a transmission loss reduction of an order of magnitude compared to standard AR fibers, covering a single mode bandwidth (BW) of 700 GHz.
J. Sultana; Derek Abbott; Saiful Islam; M.S. Habib; Cristiano M. B. Cordeiro; M. B. Cordeiro; A. Dinovitser; B. W.-H. Ng; M. Kowshik; H. Ebendorff-Heidepriem. Novel Hollow Core Antiresonant Terahertz Fiber with Metamaterial Cladding. 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) 2019, 1 -2.
AMA StyleJ. Sultana, Derek Abbott, Saiful Islam, M.S. Habib, Cristiano M. B. Cordeiro, M. B. Cordeiro, A. Dinovitser, B. W.-H. Ng, M. Kowshik, H. Ebendorff-Heidepriem. Novel Hollow Core Antiresonant Terahertz Fiber with Metamaterial Cladding. 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). 2019; ():1-2.
Chicago/Turabian StyleJ. Sultana; Derek Abbott; Saiful Islam; M.S. Habib; Cristiano M. B. Cordeiro; M. B. Cordeiro; A. Dinovitser; B. W.-H. Ng; M. Kowshik; H. Ebendorff-Heidepriem. 2019. "Novel Hollow Core Antiresonant Terahertz Fiber with Metamaterial Cladding." 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) , no. : 1-2.
We propose a plasmon induced graphene metasurface for terahertz absorption and sensing. The modelling and numerical analysis are carried out using CST microwave studio whereas a genetic algorithm (GA) is used to optimize the parameters. The metasurface is tunable by means of changing the graphene applied gate voltage. By tuning and exploiting its properties we demonstrate pa multiband absorption within the frequency of 0.1–2.25 THz with a graphene chemical potential $(\mu_{c})$ of 0.2 eV. Further results show that, the superabsorber can be used as a sensor having maximum perfect absorption of 99.7%. The metasurface is polarization insensitive and can perform well for wide incident angles for both transverse electric and transverse magnetic field.
Saiful Islam; J. Sultana; A. Dinovitser; B. W.-H. Ng; Derek Abbott. Electrically Tunable Graphene Metasurface for Multiband Superabsorption and Terahertz Sensing. 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) 2019, 1 -2.
AMA StyleSaiful Islam, J. Sultana, A. Dinovitser, B. W.-H. Ng, Derek Abbott. Electrically Tunable Graphene Metasurface for Multiband Superabsorption and Terahertz Sensing. 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). 2019; ():1-2.
Chicago/Turabian StyleSaiful Islam; J. Sultana; A. Dinovitser; B. W.-H. Ng; Derek Abbott. 2019. "Electrically Tunable Graphene Metasurface for Multiband Superabsorption and Terahertz Sensing." 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) , no. : 1-2.
Saiful Islam; Mohammad Rakibul Islam; Jakeya Sultana; Alex Dinovitser; Brian W.-H. Ng; Derek Abbott. Exposed-core localized surface plasmon resonance biosensor. Journal of the Optical Society of America B 2019, 36, 1 .
AMA StyleSaiful Islam, Mohammad Rakibul Islam, Jakeya Sultana, Alex Dinovitser, Brian W.-H. Ng, Derek Abbott. Exposed-core localized surface plasmon resonance biosensor. Journal of the Optical Society of America B. 2019; 36 (8):1.
Chicago/Turabian StyleSaiful Islam; Mohammad Rakibul Islam; Jakeya Sultana; Alex Dinovitser; Brian W.-H. Ng; Derek Abbott. 2019. "Exposed-core localized surface plasmon resonance biosensor." Journal of the Optical Society of America B 36, no. 8: 1.