Article
Materials Science, Multidisciplinary
Yang Shen, Guanchu Wang, Qiushun Zou, Xiaoyi She, Da Cai, Chongjun Jin
Summary: This study introduces a high-performance relative humidity sensor driven by a plasmonic-photonic hybrid system, which offers ultrahigh sensitivity and accuracy in humidity detection. The sensor shows great potential in medical diagnostics and optical modulation applications, demonstrating its versatility and reliability in various fields.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Xueyang Zong, Lixia Li, Kun Yu, Yufang Liu
Summary: This study demonstrates theoretically the active role of two-dimensional metallic photonic crystals (PhCs) as hybrid plasmonic-photonic lattices in light-matter interaction. By coupling optical waveguides with periodically arranged metallic nanodisks, the formation of waveguide-plasmon polaritons is achieved, showing strong coupling between waveguide-plasmon modes and excitons in WS2 at room temperature. Control over mode composition and coupling strength between polaritons by tuning lattice geometry reveals the LSPR-mediated energy transfer process, contributing to fundamental understanding and potential practical applications.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Yuanhai Lin, Deqing Che, Wenjie Hao, Yifei Dong, Heng Guo, Junsheng Wang, Xinping Zhang
Summary: This paper presents a controllable patterning technique for the fabrication of an Ag grating structure on an ITO slab, enabling strong photon-plasmon interaction to obtain waveguide-plasmon polaritons. By tuning the concentration of silver salt and the photoresist template, the morphology and periodicity of the Ag grating can be manipulated to control the strong coupling between plasmon and waveguide modes of different orders.
Article
Materials Science, Multidisciplinary
Marko Obradov, Zoran Jaksic, Ivana Mladenovic, Anja Bartula, Olga Jaksic
Summary: The use of MXenes as alternative plasmonic materials in freestanding planar nanocomposites that support Tamm plasmon polaritons (TPP) offers advantages such as strong light screening ability and rich modal behavior, leading to improvements in functionality, especially spectral, directional, and polarization selectivity.
Article
Chemistry, Multidisciplinary
Chaolumen Wu, Qingsong Fan, Wanling Wu, Tian Liang, Yun Liu, Huakang Yu, Yadong Yin
Summary: Integrating plasmonic resonance into photonic bandgap nanostructures allows for additional control over their optical properties. One-dimensional plasmonic photonic crystals with angular dependent structural colors are fabricated by assembling magnetoplasmonic colloidal nanoparticles under a magnetic field. The assembled structures exhibit angular dependent colors based on the activation of optical diffraction and plasmonic scattering.
Article
Optics
Sara Gholinezhad Shafagh, Hassan Kaatuzian, Mohammad Danaie
Summary: A novel hybrid sensor based on metal-insulator-metal plasmonic waveguides and one-dimensional photonic crystal topology is proposed in this paper, with higher sensitivity and energy coupling efficiency. The structure is sensitive to geometrical design parameters, resulting in excellent transmission properties suitable for integrated circuits and optical devices.
Article
Materials Science, Multidisciplinary
Huali Zhu, Yong Zhang, Longfang Ye, Yukun Li, Yuehang Xu, Ruimin Xu
Summary: The paper presents and demonstrates a terahertz bandpass filter based on SIPW, which achieves engineered transmission characteristics by adjusting the geometric parameters of SIW and SSPPs. Experimental results validate the effectiveness of the design in the terahertz range.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Xiaoyan Shi, Wu Yang, Huaizhong Xing, Xiaoshuang Chen
Summary: Plasmonic power splitters based on hybrid plasmonic waveguides are proposed and analyzed, where the propagation behaviors of Surface Plasmon Polaritons (SPPs) in the waveguides are numerically simulated. The design of different power splitters is achieved by understanding the intensity distributions and multimode interference of SPPs supermodes in the waveguides.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Applied
Xuewei Zhang, Shaobin Liu, Kun Liao, Jian Lou
Summary: In this paper, a novel ultra-wideband high-efficiency bandpass filter based on a surface plasmonic waveguide (SPW) is proposed. By using glide symmetry technology, the filter achieves higher propagation constant and efficient transmission. A prototype has been manufactured and measured, showing good agreement with simulations.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Optics
Jincheng Wang, Hengli Feng, Jingyu Zhang, Chang Liu, Zuoxin Zhang, Dongchao Fang, Lehui Wang, Yang Gao
Summary: This paper proposes a bilateral asymmetric equilateral triangular ring (ETR) band-stop filter based on metal-insulator-metal (MIM) waveguide and investigates its transmission spectrum and electric field distribution using finite difference time domain (FDTD) and coupled mode theory (CMT) method. The results show that changing the number and position of resonant cavities can adjust the transmission characteristics of the filter. The filter has a minimum transmission of 0.1% and a sensitivity of 1149 nm/RIU, making it suitable for highly integrated optical circuits and refractive index sensors.
Article
Optics
Jialin Chen, Hongsheng Chen, Xiao Lin
Summary: This study theoretically investigates the transition radiation of swift electrons crossing a monolayer graphene using full Maxwell equations. The excitation of photons and graphene plasmons is found to favor different particle velocities, with higher velocities leading to better directivity and intensity for photons, and lower velocities enabling efficient excitation of graphene plasmons across a wider frequency range. The interaction between swift charged particles and 2D materials or van der Waals heterostructures shows promise for the design of terahertz on-chip radiation sources.
Article
Multidisciplinary Sciences
Jalal Gholinejad, Kambiz Abedi
Summary: This article introduces a double-sided vibrating MOEMS gyroscope with an asymmetric Au grating-based readout circuit. The innovative structure of the proposed asymmetric grating and the hybrid surface plasmon polariton (SPP) mechanism are suggested for the first time in this device. Numerical modeling and simulations are performed to achieve low dimensions, high sensitivity, and broad measurement range. The provided gyroscope has a measurement range of +/- 11460 degrees/s, a mechanical sensitivity of 0.2671 nm/degrees/s, an optical sensitivity of 1.9066 mu W/degrees/s, a total sensitivity of 0.7626 mu A/degrees/s, and a resolution of 52.449 mu/s. Moreover, the characteristics of a proof mass of 0.2543 mu g, an operational wavelength of lambda = 630 nm, a bandwidth of 1.496 kHz, and a measurement time of 1 ms are obtained.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Optics
L. Avalos, A. K. Gonzalez-Alcalde, E. Chaikina, E. E. Garcia-Guerrero, A. A. Maradudin, E. R. Mendez
Summary: The study investigates the optical properties of metallic lamellar gratings with sub-wavelength period as a function of groove depth and width. Anomalies are observed under p-polarized illumination due to the excitation of surface plasmon polaritons (SPPs) and their interaction with plasmonic and photonic modes. The propagation constant of SPPs is affected by the presence of corrugations, with new resonances appearing for grooves deeper than half a wavelength.
OPTICS COMMUNICATIONS
(2021)
Article
Optics
Yimian Qin, Cunbao Ma, Lihao Huang, Yufeng Yuan, Minggong Sha, Xinli Ye, Kai Zheng
Summary: This paper presents a high-performance hybrid waveguide structure consisting of a high-index nanowire separated by a low-index dielectric gap. The structure allows for flexible control of light transmission through material configuration and geometric effects, enabling highly integrated and low-loss photonics. It is expected to be a valuable building block for various mid-infrared photonic integrated circuits.
Article
Physics, Applied
C. E. Whittaker, T. Isoniemi, S. Lovett, P. M. Walker, S. Kolodny, V Kozin, I. Iorsh, I Farrer, D. A. Ritchie, M. S. Skolnick, D. N. Krizhanovskii
Summary: Opening a gap in the exciton-dominated part of the polariton spectrum is a promising first step towards the realization of quantum-Hall-like states arising from topologically nontrivial hybridization of excitons and photons. By etching square lattice arrays of shallow holes into the uppermost layer of the structure, gaps on the order of 10 meV are opened in the photonic mode dispersion, and their size and light-matter composition can be tuned by proximity to the strongly coupled exciton resonance. Gaps ranging from almost fully photonic to highly excitonic can be demonstrated.
APPLIED PHYSICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Norhan A. A. Salama, Mohamed A. A. Swillam, Mohamed Farhat O. Hameed, Y. Badr, Shaimaa M. M. Alexeree, Salah S. A. Obayya
Summary: In this paper, a novel design of superlens based on photonic bandgap structure is reported, which achieves high resolution point spread function at a wavelength of 3 μm. The optimized structure provides high resolution in both lateral and axial directions. The proposed design has a tremendous potential in 3D biological imaging and biosensing applications.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Review
Biology
Mohammad Y. Azab, Mohamed Farhat O. Hameed, Salah S. A. Obayya
Summary: Due to the increase in cancer incidence worldwide, new methods for early cancer detection are being developed. Optical detection techniques, such as optical biosensors and other traditional optical methods, have been proven to be sensitive, accurate, rapid, noninvasive, and immune to external fields. This review paper discusses the basic features and recent research works of each optical detection technique for cancer detection.
Article
Optics
Ahmed Refaat Elhelw, Mahmoud Salman S. Ibrahim, Ahmed Nabih Zaki Rashed, Abd El-Naser A. Mohamed, Mohamed Farhat O. Hameed, Salah S. A. Obayya
Summary: In this work, a highly sensitive biosensor based on photonic crystal fiber (PCF) is proposed and analyzed for monitoring bilirubin levels in the blood. The sensor parameters and geometrical parameters are calculated and studied to ensure the fabrication feasibility of the design. High sensitivities and favorable sensor characteristics are achieved for different polarization modes. It is believed that this sensor will be beneficial for health care and early detection of bilirubin levels in the blood.
Article
Engineering, Electrical & Electronic
Amr Hisham K. Mahmoud, Mohamed Farhat O. Hameed, Mohamed Hussein, S. S. A. Obayya
Summary: This paper introduces and numerically analyzes flower-shaped nanowires (FS-NWs) with improved light harvesting. The optical and electrical characteristics of the FS-NWs are studied using the finite-difference time-domain and finite-element methods. The FS-NWs show higher absorption than conventional cylindrical NWs (CC-NWs) due to multiple resonance peaks and higher cross-section scattering.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Ahmed S. Saadeldin, Amr M. Sayed, Adnan M. Amr, Menna O. Sayed, Mohamed Farhat O. Hameed, S. S. A. Obayya
Summary: An ultrathin and broadband metamaterial absorber with loaded four lumped resistors is proposed and analyzed in this study. The absorptivity is increased by simultaneously reducing the reflection and transmission coefficients. The proposed design utilizes continuous metallic ground to achieve zero transmission and matches the impedance with free space to reduce reflection. It demonstrates electric and magnetic resonances with perfect absorptivity. The suggested absorber exhibits high absorption over a wide frequency range and incident angle variation, making it suitable for applications in communications, stealth, and imaging fields.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
M. Abdelghaffar, Yusuf Gamal, Reda A. El-Khoribi, Wafaa Soliman, Y. Badr, Mohamed Farhat O. Hameed, S. S. A. Obayya
Summary: This paper introduces a novel design of photonic crystal fiber (PCF) biosensor based on surface plasmon resonance (SPR) for cancer cell detection. The full vectorial finite element method (FVFEM) is used for the numerical analysis. The suggested biosensor has a V-shaped surface coated with ZrN as a plasmonic material. The optimized geometrical parameters result in high sensor sensitivity, with optical sensitivity values ranging from 3800 to 6214.28 nm/RIU for different cancer cell types.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Optics
Chengyi Duan, Xiaofei Zhang, Zheren Du, Jia Chen, Ramy El-Bashar, S. S. A. Obayya, Mohamed Hameed, Jun Dai
Summary: Inverted perovskite solar cells (PSCs) have the potential to be widely used due to their low-temperature fabrication, negligible hysteresis, and compatibility with multi-junction cells. However, the performance of inverted PSCs is limited by the presence of excessive defects in low-temperature fabricated perovskite films. In this study, a simple and effective passivation strategy using Poly(ethylene oxide) (PEO) polymer was employed to modify the perovskite films, which successfully reduced the interface defects. As a result, the power conversion efficiency (PCE) of the inverted PSCs increased from 16.07% to 19.35%, and the PCE of unencapsulated PSCs remained 97% after 1000 hours of storage in a nitrogen atmosphere.
Article
Multidisciplinary Sciences
Nayira M. Elgammal, B. M. Younis, Mahmoud A. Gaafar, M. M. Elkholy, Mohamed Farhat O. Hameed, S. S. A. Obayya
Summary: This paper reports a design for highly efficient crosstalk reduction in the mid-infrared (MIR) regime, which is achieved by utilizing Ge/Si strip arrays instead of traditional Si devices. The proposed structure shows improved crosstalk reduction and longer coupling length compared to strips-free Si waveguides, providing benefits for high packing density nanophotonic devices in the MIR regime.
SCIENTIFIC REPORTS
(2023)
Article
Nanoscience & Nanotechnology
Maria Caterina Giordano, Francesco Buatier de Mongeot, Debasree Chowdhury, Shaimaa A. Mohamed, Giacomo Manzato, Beatrice Siri, Roberto Chittofrati, Mohamed Hussein, Mohamed F. O. Hameed, Salah S. A. Obayya, Philipp Stadler, Markus C. Scharber, Giuseppe Della Valle
Summary: Thin-film organic photovoltaic (OPV) devices are being considered as a promising alternative to silicon solar cells due to their lightweight, flexibility, and low cost. However, the low optical absorption of OPV active layers is still a challenge. In this study, we demonstrate that nanostructured interfaces at the subwavelength scale, created through laser interference lithography and reactive ion etching, can significantly enhance the optical absorption in thin-film OPV devices. This large-scale light-harvesting strategy resulted in a 19% increase in optical absorption and a 14% increase in short-circuit current compared to flat devices, highlighting its potential in thin-film technologies.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
B. M. Younis, Nada Yazeed M. Dawood, Saleh Mahmoud, Bilal El-Sayed, El-Sayed Usama, Mohamed H. Almoqadem, Mohamed Farhat O. Hameed, S. S. A. Obayya
Summary: This paper presents a mid-infrared optical modulator based on a phase-changing material (GST) and a D-shaped photonic crystal fiber (PCF). The modulation process relies on the phase transition of the GST material between amorphous and crystalline states. Numerical analysis using the finite element method (FEM) and finite difference time domain (FDTD) method is carried out to study the optical losses and performance of the proposed modulator. The modulator exhibits a high extinction ratio (ER) of 302.61 dB and a low insertion loss (IL) of less than 0.00014 dB, making it suitable for applications in photonic integrated circuits requiring high ER, low IL, and large optical bandwidth.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Afaf Salah Wahba, Ghada Yassin Abdel-Latif, Shamia El-Sherbiny, Nihal F. F. Areed, Mohamed Farhat O. Hameed, S. S. A. Obayya
Summary: This article proposes and analyzes a novel design of tin perovskite solar cell with moth-eye nanostructures for improved light absorption and energy harvesting. By studying the geometrical parameters and position of the nanostructures, it is found that the suggested design shows significantly enhanced light trapping compared to conventional planar structures. This efficient replacement to lead-perovskite offers excellent photovoltaic properties, low fabrication cost, suitable band gap, eco-friendliness, and great performance in converting sunlight to electrical energy.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Mahmoud Salman S. Ibrahim, Mohamed Saleh M. Esmail, Mohamed Tarek, A. A. Soliman, Mohamed Farhat O. Hameed, S. S. A. Obayya
Summary: In this study, THz photonic crystal fiber (PCF) is utilized to detect the creatinine level in blood with high sensitivity. The sensing technique relies on enhancing the interaction of light with the analyte in the fiber core region. The proposed THz-PCF biosensor demonstrates promising potential in measuring creatinine level in blood.
OPTICAL AND QUANTUM ELECTRONICS
(2023)