Article
Optics
Shu-Ting Guo, Yu-Hong Zhang, Liu-Le Wu, Ming-Yong Ye, Xiu-Min Lin
Summary: Electromagnetically induced transparency and absorption have applications in atomic systems, including slow-light generation, while coupled-resonator-induced transparency and absorption serve as their optical analogues. Theoretical and experimental studies on CRIT and CRIA in directly coupled whispering-gallery-mode microresonators provide conditions for observing and predicting transitions between them with changes in coupling strength. The experimental demonstration of transitions between CRIT and CRIA using a microsphere coupled to a sausagelike microresonator offers guidelines for observation.
Article
Optics
A. H. Gevorgyan
Summary: Theoretical discovery of magnetically induced transparency in a magnetically active helically structured medium allows tuning of frequency and linewidth of the transparency band by changing external magnetic field and absorption.
Article
Physics, Multidisciplinary
Zhuchuang Yang, Yangkuan Wu, Wei Xu, Huaxin Zhu, Xiangyang Zhang, Ben-Xin Wang
Summary: In this paper, a bi-functional metamaterial resonance device operating at terahertz frequency is designed, which combines plasmon-induced transparency (PIT) and Fano-like response. The device is composed of three metallic strips, with two parallel strips and one deviated strip from the center position. The horizontal metallic strip plays a crucial role in adjusting the resonance response, and the device can effectively switch from bi-functional resonance to single-functional PIT effect with a certain deviation value. This proposed structure can serve as a valuable platform for inspiring the design of novel electro-optic devices.
Article
Nanoscience & Nanotechnology
Tigran V. Shahbazyan
Summary: The model describes the transition to a strong coupling regime between an emitter and a surface plasmon, demonstrating that the shape of scattering spectra is determined by an interplay of two distinct mechanisms. The near-field coupling between the emitter and the plasmon mode influences energy exchange and provides exciton-induced transparency, while Fano interference between plasmon and emitter dipoles affects the spectral asymmetry inversion reported in experiments.
Article
Optics
Alejandro San-Blas, Mahmoud H. Elshorbagy, Santiago M. Olaizola, Luis M. Sanchez-Brea, Ainara Rodriguez, Jesus del Hoyo, Eduardo Granados, Angela Soria-Garcia, Veronica Pastor-Villarrubia, Javier Alda
Summary: In this study, gold-coated laser-induced periodic surface structures (LIPSS) nanostructures were fabricated on stainless steel substrates using femtosecond laser nano-ablation. The optical response of the fabricated LIPSS was modeled and simulated, showing excellent agreement with the experimental results. The fabricated devices showed competitive performance in terms of cost and simplicity compared to existing devices.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Nanda Perdana, Carsten Rockstuhl, Alexander A. Iskandar
Summary: This study investigates the appearance and control of higher order multipolar resonances in two coupled high permittivity dielectric scatterers by adjusting their spacing. By expanding the contribution of a specific multipole into a series of Lorentzian oscillators, the resonances are studied in terms of resonance position, oscillator strength, and damping, revealing an optimal distance for maximal oscillator strength. New approaches for tailoring the optical response from photonic scatterers are disclosed through this research.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Multidisciplinary Sciences
Alberto Hernandez-Minguez, Alexander Poshakinskiy, Michael Hollenbach, Paulo Santos, Georgy Astakhov
Summary: This study demonstrates a new method of acoustic manipulation of spin qubits, showing a significant interaction between surface acoustic waves and the excited-state spin of silicon vacancies, which leads to more coherent spin control. By simultaneously driving spins in the ground and excited states with the same surface acoustic wave, the spins can be trapped along a specific direction. This coherent acoustic manipulation of spins in different states opens up new opportunities for on-chip quantum information protocols and coherent sensing.
Article
Optics
Bin Zhang, Yaodong Sun, Yi Xu, Guiying Hu, Pingyang Zeng, Mingqi Gao, Di Xia, Yufei Huang, Zhaohui Li
Summary: By harnessing optical loss in a coupled high-Q resonators system, on-chip electromagnetically induced transparency (EIT) can be achieved, leading to fast and nonvolatile responses. This mechanism, demonstrated experimentally on chalcogenide coupled microring resonators in a monolithically integrated chip, provides a new perspective for tunable photonic devices.
Article
Materials Science, Multidisciplinary
Richard Porter, Kim Pham, Agnes Maurel
Summary: This study investigates the acoustic wave propagation in a waveguide with two resonant side-branch channels. The impact of the channels is reduced to jump conditions across the junction in one-dimensional models. When the separation distance is on the scale of the wavelength, out-of-phase interferences between the two junctions lead to acoustically induced transparency. On the other hand, when the separation distance is subwavelength, the evanescent field coupling the two channels accounts for perfect transmission due to Autler-Townes splitting.
Article
Physics, Applied
Zi-Lan Deng, Xiao-Chen Qiao, Ya-Bin Chen, Tan Shi, Xiangping Li, Jian-Wen Dong
Summary: A proposal of Fano lasing spaser in a superlattice meta-grating is demonstrated, where spatial-temporal lasing dynamics are investigated using a semiclassical model combining full-wave electromagnetic equations and electronic rate equations. The independent tailoring of out-of-phase dark mode and in-phase bright mode supported by the meta-grating by adjusting the width of the thin strip and fat strip in each supercell allows for optimal lasing characteristic. This finding may offer a useful guideline for designing low-threshold and high-efficient miniaturized lasers.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Lauren Zundel, Asher May, Alejandro Manjavacas
Summary: Periodic arrays of nanoparticles can support lattice resonances, with the potential to induce vacancies in the array resulting in unique lattice resonances. Through a comprehensive analysis using a coupled dipole approach, it was found that these vacancy-induced lattice resonances have subradiant character and originate from symmetry breaking caused by the vacancies. The study also explores the possibility of implementing arrays with vacancies made of nanocylinders in a homogeneous dielectric environment to control the optical response of nanostructures.
Article
Optics
Guan Wang, Tong Wu, Yabin Shao, Yang Jia, Yang Gao, Yachen Gao
Summary: In this paper, a metal-insulator-metal waveguide structure composed of a hexagonal resonator cavity and a ring with a slit is proposed, and the transmission properties of the structure are studied using the finite difference time domain method. It is found that three distinct plasmon-induced transparency peaks appear in the visible and near-infrared bands with a transmissivity of more than 80%. By adjusting the structure size and using graphene to cover the surface of the cavity, the positions of the transmission peaks can be changed. Based on this effect, an all-optical switcher with ultrafast response and low light absorption is designed, providing a potential solution for the development of visible and near-infrared filters and all-optical switchers.
Article
Optics
Shan Yin, Dehui Zeng, Mingkun Zhang, Xintong Shi, Yuanhao Lang, Wei Huang, Wentao Zhang, Jiaguang Han
Summary: In this paper, the distinguishable modulation of different eigenmodes by lattice mode in terahertz U-shaped metasurfaces is observed, and a remarkable suppression of high order eigenmode resonance induced by the lattice is demonstrated. By quantitatively analyzing the Q factor and loss of the resonances, it is clarified that the peculiar phenomenon of suppression originates from the phase mismatch introduced by the phase difference between neighboring structures. These results provide new insights into the phase mismatch mediated transmission amplitude of eigenmode resonance in metasurfaces and open a new path for developing terahertz multifunctional devices.
Article
Optics
Chen Liu, Xinquan Lai, Zhengfeng Li, Dinghai Jin
Summary: In this study, we investigate an end-coupled metal-dielectric-metal (MDM) structure that achieves plasmon-induced absorption (APIA) without additional area cost. The proposed structure exhibits remarkable sensing and phase characteristics, showing great potential in applications such as bio-chemical sensing, slow light devices, and optical switching.
Article
Chemistry, Multidisciplinary
Shu-Cheng Lo, Chun-Wei Yeh, Sheng-Hann Wang, Chia-Wen Kuo, Kuang-Li Lee, Ruey-Lin Chern, Pei-Kuen Wei
Summary: The research demonstrates that Fano resonance in an aluminum capped nanoslit array can eliminate the signal of bulk refractive index changes, enabling measurement of only the bio-layer thickness without interference.
Article
Materials Science, Multidisciplinary
Xinyue Wu, Yabin Jin, Abdelkrim Khelif, Xiaoying Zhuang, Timon Rabczuk, Bahram Djafari-Rouhani
Summary: The study proposes topological metamaterials in the Hertz frequency range, consisting of concrete pillars in a honeycomb lattice on the soil ground. By breaking the inversion symmetry of the unit cell, a non-trivial bandgap is formed, analogous to the quantum valley Hall effect. The robustness of the topological interface between two different crystal phases against defects and disorders is quantitatively analyzed. Additionally, a harvesting energy device is designed using the robust and compact topological edge state, showing functionality in both reducing surface vibration and energy harvesting.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Physics, Applied
Zhihui Wen, Wan Wang, Abdelkrim Khelif, Bahram Djafari-Rouhani, Yabin Jin
Summary: Rapid advances have been made in the properties of metastructures, including phononic crystals, metamaterials, and metasurfaces, with regards to their robustness, high power density, and broadband behavior. These advancements provide unique advantages for energy harvesting devices in meeting technological upgrades in various applied science and engineering applications. This article systematically provides an overview of the mechanisms underlying these properties, considering different wave localization configurations in elastic metastructures for energy harvesting purposes, and discusses future prospects for energy harvesting metastructures.
APPLIED PHYSICS LETTERS
(2022)
Article
Energy & Fuels
Asif Hayat, Muhammad Sohail, Taha Abdel Mohaymen Taha, Asma M. Alenad, Mohammed A. Amin, Ashiq Hayat, Ahmad Irfan, Arkom Palamanit, Yas Al-Hadeethi, Sunil Kumar Baburao Mane, Javid Khan
Summary: The integration of 2,6-dimethylindole (DMI) into polymeric carbon nitride (PCN) significantly enhances the photocatalytic activity of PCN, leading to improved hydrogen evolution and dye degradation under visible light.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Physics, Multidisciplinary
M. Muhibbullah, Ali A. Alhazime, Muhammad Amin, Salah E. El-Zohary
Summary: This paper presents a novel design of a rectenna solar cell, using an antenna associated with a rectifier. By changing the antenna shape and selecting appropriate materials, a more efficient conversion of light to electric energy can be achieved.
Article
Chemistry, Multidisciplinary
Feng Gao, Sarah Benchabane, Amine Bermak, Shurong Dong, Abdelkrim Khelif
Summary: This article reports a micron-scale phononic waveguide constructed by line defects in PnCs, which enables on-chip, tightly confined guiding, bending, and splitting of surface acoustic waves (SAWs). The proposed phononic waveguides demonstrate the feasibility of precise local manipulation of SAW that is essential for emerging frontier applications, notably for phonon-based classical and quantum information processing.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Rui Chen, H. Arda Ulku, Francesco P. Andriulli, Hakan Bagci
Summary: The low-frequency behavior of vector potential integral equations for perfect electrically conducting scatterers is investigated in this study. Two sets of equations are considered, with different boundary conditions on the vector potential. The analysis shows that one set of equations has incorrect frequency scaling and inaccurate results at low frequencies.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Liang Chen, Mehmet Burak Ozakin, Ran Zhao, Hakan Bagci
Summary: The generalized sheet transition conditions (GSTCs) are integrated into a discontinuous Galerkin time-domain (DGTD) method to efficiently simulate metasurfaces. The numerical flux for GSTCs is derived for the first time using the Rankine-Hugoniot jump conditions. A new time marching scheme is developed to address the instability issue caused by the explicit time integration schemes traditionally used with DGTD. The proposed method demonstrates its accuracy and applicability to simulate curved and space/time-varying metasurfaces.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Review
Nanoscience & Nanotechnology
Anastasiia O. Krushynska, Daniel Torrent, Alejandro M. Aragon, Raffaele Ardito, Osama R. Bilal, Bernard Bonello, Federico Bosia, Yi Chen, Johan Christensen, Andrea Colombi, Steven A. Cummer, Bahram Djafari-Rouhani, Fernando Fraternali, Pavel I. Galich, Pedro David Garcia, Jean-Philippe Groby, Sebastien Guenneau, Michael R. Haberman, Mahmoud I. Hussein, Shahram Janbaz, Noe Jimenez, Abdelkrim Khelif, Vincent Laude, Mohammad J. Mirzaali, Pawel Packo, Antonio Palermo, Yan Pennec, Ruben Pico, Maria Rosendo Lopez, Stephan Rudykh, Marc Serra-Garcia, Clivia M. Sotomayor Torres, Timothy A. Starkey, Vincent Tournat, Oliver B. Wright
Summary: This review article provides a summary of recent advances and hot research topics in nanophononics and elastic, acoustic, and mechanical metamaterials based on the authors' presentations at the EUROMECH 610 Colloquium. Unlike a conventional review, it focuses on the state-of-the-art and emerging research directions in these fields rather than historical viewpoints. The article covers basic definitions, design strategies, analysis techniques, and discussions of challenges and applications in each topic, offering valuable insights for early-career researchers and others interested in these areas.
Article
Physics, Multidisciplinary
Waqas W. Ahmed, Mohamed Farhat, Kestutis Staliunas, Xiangliang Zhang, Ying Wu
Summary: Non-Hermitian systems provide new platforms for manipulating physical properties through redistribution of refractive indices, leading to asymmetric reflection and symmetric transmission. Supervised and unsupervised learning techniques are applied to accelerate the inverse design process and recognize non-Hermitian features from transmission spectra. The developed deep learning framework determines the feasibility of desired spectral responses and uncovers the role of gain-loss parameters in tailoring the spectra.
COMMUNICATIONS PHYSICS
(2023)
Review
Chemistry, Analytical
Minye Yang, Zhilu Ye, Yichong Ren, Mohamed Farhat, Pai-Yen Chen
Summary: Wearable electronics, as a new and rapidly expanding interdisciplinary field, have shown significant potential in monitoring and analyzing body or environmental information through flexible substrates, conductors, and transducers. Recent progress in the development of emerging nanomaterial-based wearable electronics and their current state-of-the-art applications are reviewed in this article, along with an outlook on future research directions in this field.
Article
Physics, Applied
Rahman Sharaf, Sara Darbari, Abdelkrim Khelif
Summary: In this work, a double-stage phononic crystal (PnC) is proposed and explored, which consists of a top suspended ZnO layer, an array of sandwiched Si pillars, and a bottom ZnO layer on a Si substrate. The double-stage PnC exhibits interesting behavior in routing surface acoustic waves (SAWs) based on polarization and frequency, making it a potential component for alternative multistage SAW devices. By designing the PnC as a vertical SAW splitter in a Mach-Zehnder interferometer, the excitation of appropriate surface-coupled modes through the resonating pillars allows the utilization of the acoustoelectric effect in ZnO layers for sensing and reference branches. The vertical configuration simplifies the experimental implementation and offers exposure of the top ZnO layer to external stimulations while protecting the underlying parts.
PHYSICAL REVIEW APPLIED
(2023)
Article
Materials Science, Multidisciplinary
Hamza Baali, Mahmoud Addouche, Abdesselam Bouzerdoum, Abdelkrim Khelif
Summary: In this study, the authors propose an efficient data-driven approach for analyzing and designing membrane-type sound absorbers with desirable properties. They use a neural network to map the input parameters to the observed sound absorption spectrum and then infer the input parameters that produce the desired absorption response. Two devices are fabricated and their measured acoustic absorption responses show a close agreement with the desired responses.
COMMUNICATIONS MATERIALS
(2023)
Article
Optics
Omar Alkhazragi, Ming Dong, Liang Chen, Meiwei Kong, Georgian Melinte, Dong Liang, Tien Khee Ng, Junping Zhang, Hakan Bagci, Boon S. Ooi
Summary: The high coherence of lasers can be detrimental in certain applications due to the formation of coherence artifacts. This issue can be resolved by increasing the number of mutually incoherent modes emitted from the laser. Chaotic-cavity VCSELs can achieve broader modulation bandwidths and higher data rates compared to other low-coherence light sources.
Article
Metallurgy & Metallurgical Engineering
Yang Min-ye, Ye Zhi-lu, Zhu Liang, Farhat Mohamed, Chen Pai-Yen
Summary: In recent years, the peculiar physical phenomena enabled by non-Hermitian systems, particularly the parity-time (PT)-symmetric systems, have sparked significant research interest. While discussions on exceptional points (EPs) have been extensive, theoretical analysis and experimental validations of coherent perfect absorber-laser (CPAL) points are lacking. The CPAL phenomena, as a special solution in broken PT-symmetry phase, may have further counterintuitive physical features with implications for non-Hermitian physics.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
