Plasmonics

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Eco-Friendly Fabrication of Silver Nanoparticles for Sustainable Water Purification and Antibacterial Synergy
Plasmonics - - 2024
Parvathalu Kalakonda, Mahesh Thodeti, Cheguveera Ganneboina, Keerthi Ankathi, Swetha Kathri, Karthik Begari, Hruthik Sai Kante, Vijendar Jupalli, Yasaswi Khaderabad, Saroj Vijaylaxmi, Vijay Morampudi, Pritam Mandal, Vasudeva Reddy Yatham, Imran Hasan, Bala Bhaskar Podila
Silver nanoparticles (AgNPs) were synthesized using the aqueous extract of Terminalia chebula (T-Chebula) fruits. Characterization through X-ray diffraction (XRD) and scanning electron microscopy (SEM) revealed AgNPs with a crystalline size ranging from 21 to 24 nm. The biosynthesized AgNPs exhibited a morphology unique to T-Chebula-AgNPs (TC-AgNPs), with an average size of 50 nm and a band gap en... hiện toàn bộ
Resonance Bandwidth Controllable Adjustment of Electromagnetically Induced Transparency-like Using Terahertz Metamaterial
Plasmonics - Tập 15 - Trang 1997-2002 - 2020
Yuanhao He, Ben-Xin Wang, Pengcheng Lou, Nianxi Xu, Xiaoyi Wang, Yanchao Wang
In the fields of communication and sensing, resonance bandwidth is a very critical index. It is very meaningful to implement a broadband resonance device with a simple metamaterial structure in the terahertz band. In this paper, we propose a simple metamaterial structure which consists of one horizontal metal strip and two vertical metal strips. This structure can achieve an electromagnetically in... hiện toàn bộ
Miniaturized Five-Band Perfect Metamaterial THz Absorber with Small Frequency Ratio
Plasmonics - Tập 17 - Trang 79-86 - 2021
Vijayalakshmi Kannaiyan, Kanimozhiselvi Chenniangirivalasu Sadhasivam
A five-band polarization-insensitive perfect metamaterial absorber (PMA) is reported in this paper for THz detection and sensing applications. The proposed absorber is constructed using interconnected circular ring elements enclosed by a square loop. The ring elements are interconnected using short strip lines which increases the electrical length to offer resonance at the lower frequencies of the... hiện toàn bộ
Characterization of CCTRC Waveguide and Measurement of Vitamin C Concentration
Plasmonics - - 2024
Z. L. Wu, Jun Zhu
Antenna-Attached Parabolic Probe for Excitation and Collection Modes in SNOM
Plasmonics - - 2016
Wei Zhu, Tielin Shi, Guanglan Liao, Zirong Tang
A novel optical fiber probe with a parabola-like shape and a nano-antenna mounted on the center of its endface is proposed for simultaneous excitation and collection modes in scanning near-field optical microscopy. The working principles of the probe are demonstrated, and its optical properties are theoretically investigated and compared with the conventional tip-on-aperture probe. It shows that t... hiện toàn bộ
Influence of Dielectric Coating on Performance of Surface Plasmon Resonance Sensor
Plasmonics - Tập 12 - Trang 1121-1130 - 2016
J. B. Maurya, Y. K. Prajapati
In the present study, the nature of dielectric layer above metal layer in surface plasmon resonance sensor is investigated. The performance-defining parameters, i.e., shift in resonance angle, half width at half maximum, and minimum reflection intensity, are investigated according to the variation of refractive index (real as well as imaginary) of dielectric layer. Moreover, these parameters are i... hiện toàn bộ
Enhanced Intermolecular Energy Transfer in the Vicinity of a Plasmonic Nanorice
Plasmonics - Tập 5 - Trang 363-368 - 2010
H. Y. Chung, P. T. Leung, D. P. Tsai
The problem of radiationless Förster energy transfer between a donor and an acceptor molecule is studied in the vicinity of a metallic nanorice. Using a recently formulated effective medium theory, the modified dipole–dipole interaction between the molecules in the vicinity of a spheroidal metallic nanoshell can be easily formulated, from which huge enhancement of the energy transfer rate is obtai... hiện toàn bộ
Recent Progress of Surface Plasmon–Enhanced Light Trapping in GaAs Thin-Film Solar Cells
Plasmonics - Tập 18 - Trang 2009-2029 - 2023
Bo Wei, Xu Mao, Wen Liu, Chunxue Ji, Guiqiang Yang, Yidi Bao, Xiaoling Chen, Fuhua Yang, Xiaodong Wang
Light trapping technology is one of the effective ways to improve the performance of solar cells, which can enhance the light absorption and reduce the thickness of the material and thus the expense. In recent years, surface plasmons (SPs) have made considerable progress in this field. By exploiting the light scattering and coupling effects of SPs, the efficiency of solar cells can be improved gre... hiện toàn bộ
High-Performance Eight-Channel Photonic Crystal Ring Resonator–Based Optical Demultiplexer for DWDM Applications
Plasmonics - Tập 16 - Trang 2073-2080 - 2021
Anushka Berry, Nidhi Anand, Sangeetha Anandan, Prabu Krishnan
In this paper, a photonic crystal ring resonator (PCRR)-based optical demultiplexer is reported for Dense Wavelength Division Multiplexing (DWDM) applications. Diamond and silicon-dioxide are designed and simulated by an eight-channel PCRR. An average uniform spacing of 0.8 nm and 1.94 nm is obtained for the proposed demultiplexer, with silicon-dioxide and diamond, respectively. For the eight-chan... hiện toàn bộ
Theoretical Analysis of Plasmon-Induced Transparency in Ring-resonators Coupled Channel Drop Filter Systems
Plasmonics - Tập 9 - Trang 1431-1437 - 2014
Shiping Zhan, Hongjian Li, Guangtao Cao, Zhihui He, Boxun Li, Hui Xu
The plasmon-induced transparency (PIT) in ring-resonators coupled channel drop filter (CDF) systems is investigated theoretically and numerically in this paper. A coupled mode theory-based transfer matrix method (CMT-TMM) is introduced owning to the symmetric and evanescent coupling, which is confirmed by the finite-difference time-domain (FDTD) simulation results. The drop waveguide provides the ... hiện toàn bộ
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