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Yan Q, Wang S, Guan K, Guan X, He L. Cathodoluminescence and tip-plasmon resonance of Bi2Te3 triangular nanostructures. PLoS One 2024; 19:e0291251. [PMID: 38241382 PMCID: PMC10798455 DOI: 10.1371/journal.pone.0291251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 08/23/2023] [Indexed: 01/21/2024] Open
Abstract
Bi2Te3, as a topological insulator, is able to support plasmonic emission in the visible spectral range. Thin Bi2Te3 flakes can be exfoliated directly from a Bi2Te3 crystal, and the shape of Bi2Te3 flakes can be further modified by focused ion beam milling. Therefore, we have designed a Bi2Te3 triangular antenna with distinct tip angles for the application of plasmonic resonance. The plasmonic emission of the Bi2Te3 triangular antenna is excited and investigated by cathodoluminescence in the scanning electron microscope. Enhanced tip plasmons have been observed from distinct tips with angles of 20º, 36º, 54º, 70º, and 90º, respectively. Due to the confinement of geometric boundaries for oscillating charges, the resonant peak position of tip plasmon with a smaller angle has a blue shift. Moreover, the dependence of plasmonic behavior on the excitation position has been discovered as well. This research provides a unique approach to fabricate Bi2Te3 nanostructures and manipulate the corresponding plasmonic properties.
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Affiliation(s)
- Qigeng Yan
- Department of Physics, Baoding University, Baoding, Hebei, China
- Department of Physics, University of Arkansas, Fayetteville, Arkansas, United States of America
| | - Siyuan Wang
- Department of Science and Research, Baoding University, Baoding, Hebei, China
| | - Kuiwen Guan
- Department of Physics, University of Arkansas, Fayetteville, Arkansas, United States of America
| | - Xiaojin Guan
- Department of Physics, University of Arkansas, Fayetteville, Arkansas, United States of America
| | - Lei He
- Department of Physics, University of Arkansas, Fayetteville, Arkansas, United States of America
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Aly AH, Mohamed BA, Al-Dossari M, Awasthi SK, Fouad E, Amin AF. Ultra-high sensitive cancerous cells detection and sensing capabilities of photonic biosensor. Sci Rep 2023; 13:19524. [PMID: 37945743 PMCID: PMC10636125 DOI: 10.1038/s41598-023-46667-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Accepted: 11/03/2023] [Indexed: 11/12/2023] Open
Abstract
The ultra-high sensitive cancer cell detection capabilities of one-dimensional photonic crystal with defect have been theoretically examined in this work. The simulations of the work have been carried out with MATLAB programming and transfer matrix method. The performance of the proposed biosensor loaded separately with samples containing different cancer cells has been studied by changing the period number, defect layer thickness, and incident angle corresponding to s polarized light only to identify the parameters under which the proposed design becomes ultra-sensitive. The working principle of the proposed biosensor is to sense the minute change in the refractive index of the analytes containing different cancer cells of human. This sensing is done shifting the respective defect mode inside photonic band gap of the structure from one position to other near by position due to change in the refractive index of sample under consideration. Our structure under optimum conditions yields maximum shifting in the position of defect mode from 1538 to 1648 nm corresponding to the samples containing normal and Glioblastoma cells of refractive indices 1.350 and 1.4470 respectively which results a ultra-high sensitivity of 4270.525928 nm/RIU.
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Affiliation(s)
- Arafa H Aly
- TH-PPM Group, Physics Department, Faculty of Sciences, Beni-Suef University, Beni Suef, 62514, Egypt.
| | - B A Mohamed
- TH-PPM Group, Physics Department, Faculty of Sciences, Beni-Suef University, Beni Suef, 62514, Egypt
| | - M Al-Dossari
- Department of Physics, Faculty of Science, King Khalid University, 62529, Abha, Saudi Arabia
| | - S K Awasthi
- Department of Physics and Material Science and Engineering, Jaypee Institute of Information Technology, Noida, 201304, India
| | - Emadelden Fouad
- Department of Engineering Physics, Florida Polytechnic University, Lakeland, USA
| | - A F Amin
- Faculty of Technology and Education, Beni-Suef University, Beni Suef, 62521, Egypt
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Guo TL, Li F, Roussey M. Dielectric Cavity-Insulator-Metal (DCIM) Metamaterial Absorber in Visible Range. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1401. [PMID: 37110987 PMCID: PMC10145544 DOI: 10.3390/nano13081401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/11/2023] [Accepted: 04/15/2023] [Indexed: 06/19/2023]
Abstract
For many years, metamaterial absorbers have received much attention in a wide range of application fields. There is an increasing need to search for new design approaches that fulfill more and more complex tasks. According to the specific application requirements, design strategy can vary from structure configurations to material selections. A new combination of a dielectric cavity array, dielectric spacer, and gold reflector as a metamaterial absorber is proposed and theoretically studied in this work. The complexity of the dielectric cavities leads to a more flexible optical response than traditional metamaterial absorbers. It gives a new dimension of freedom for a real three-dimensional metamaterial absorber design.
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Affiliation(s)
- Tian-Long Guo
- Center for Photonics Sciences, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland
- Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Road, Ningbo 315201, China
| | - Fangfang Li
- Center for Photonics Sciences, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland
| | - Matthieu Roussey
- Center for Photonics Sciences, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland
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Akbari S, Hamidi SM, Eftekhari H, Heirani-Tabasi A. Fast electro-plasmonic detection of heart signal in Balb/C cells onto one-dimensional plasmonic grating. PLoS One 2023; 18:e0282863. [PMID: 36928689 PMCID: PMC10019604 DOI: 10.1371/journal.pone.0282863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 02/24/2023] [Indexed: 03/18/2023] Open
Abstract
The heart is a vital and complex organ in the human body that forms with most organs between the second week of pregnancy, and fetal heart rate is an important indicator or biological index to know the condition of fetal well-being. In general, long-term measurement of fetal heart rate is the most widely used method of providing information about fetal health. In addition to fetal life, growth, and maturity, information such as congenital heart disease, often due to structural or functional defects in heart structure that often occur during the first trimester of pregnancy during fetal development, can be detected by continuous monitoring of fetal heart rate. The gold standard for monitoring the fetus's health is the use of non-invasive methods and portable devices so that while maintaining the health of the mother and fetus, it provides the possibility of continuous monitoring, especially for mothers who have a high-risk pregnancy. Therefore, the present study aimed to propose a low-cost, compact, and portable device for recording the heart rate of 18-day-old fetal mouse heart cells. Introduced device allows non-invasive heart rate monitoring instantly and without side effects for mouse fetal heart cells. One-dimensional gold-plated plasmonic specimens as a physiological signal recorder are mainly chips with nanoarray of resonant nanowire patterns perform in an integrated platform. Here the surface plasmon waves generated in a one-dimensional plasmonic sample are paired with an electrical wave from the heart pulse, and this two-wave pairing is used to record and detect the heart rate of fetal heart cells with high accuracy and good sensitivity. This measurement was performed in normal mode and two different stimulation modes. Stimulation of cells was performed once using adrenaline and again with electrical stimulation. Our results show that our sensor is sensitive enough to detect heart rate in both standard and excitatory states and is also well able to detect and distinguish between changes in heart rate caused by different excitatory conditions.
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Affiliation(s)
- S. Akbari
- Magneto-plasmonic Lab, Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | - S. M. Hamidi
- Magneto-plasmonic Lab, Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
- * E-mail:
| | - H. Eftekhari
- Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - A. Heirani-Tabasi
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center Hospital, Tehran University of Medical Sciences, Tehran, Iran
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Shafqat MD, Mahmood N, Zubair M, Mehmood MQ, Massoud Y. Highly Efficient Perfect Vortex Beams Generation Based on All-Dielectric Metasurface for Ultraviolet Light. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3285. [PMID: 36234413 PMCID: PMC9565325 DOI: 10.3390/nano12193285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/14/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
Featuring shorter wavelengths and high photon energy, ultraviolet (UV) light enables many exciting applications including photolithography, sensing, high-resolution imaging, and optical communication. The conventional methods of UV light manipulation through bulky optical components limit their integration in fast-growing on-chip systems. The advent of metasurfaces promised unprecedented control of electromagnetic waves from microwaves to visible spectrums. However, the availability of suitable and lossless dielectric material for the UV domain hindered the realization of highly efficient UV metasurfaces. Here, a bandgap-engineered silicon nitride (Si3N4) material is used as a best-suited candidate for all-dielectric highly efficient UV metasurfaces. To demonstrate the wavefront manipulation capability of the Si3N4 for the UV spectrum, we design and numerically simulate multiple all-dielectric metasurfaces for the perfect vortex beam generation by combing multiple phase profiles into a single device. For different numerical apertures (NA =0.3 and 0.7), it is concluded that the diffracted light from the metasurfaces with different topological charges results in an annular intensity profile with the same ring radius. It is believed that the presented Si3N4 materials and proposed design methodology for PV beam-generating metasurfaces will be applicable in various integrated optical and nanophotonic applications such as information processing, high-resolution spectroscopy, and on-chip optical communication.
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Broadband and Wide-Angle Performance of a Perfect Absorber Using a MIM Structure with 2D MXene. ELECTRONICS 2022. [DOI: 10.3390/electronics11091370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Due to the extraordinary optoelectronic properties and surface-rich functional groups, MXene has shown great promise in many applications, such as electromagnetic shielding, catalysis, sensors, ultrafast photons, etc. In this work, we propose a wide-angle absorber based on a metal-insulator-metal (MIM) metamaterial consisting of MXene. By optimizing the design, the absorption efficiency can be further improved throughout the entire wavelength range. More importantly, the absorber exhibits high-efficiency broadband and wide-angle (20–80°) absorption in the near-infrared range (NIR: 1.1–1.7 μm) by numerical calculation. It is foreseeable that the excellent absorption characteristics and easy-to-manufacture structure of the designed absorber will bring some inspiration to the absorption device in the NIR and its practical application.
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