Article
Materials Science, Multidisciplinary
K. G. Fripp, A. V. Shytov, V. V. Kruglyak
Summary: The study reveals strong chiral scattering of spin waves from mesoscale chiral magnonic resonators, which can be used as efficient spin-wave diodes and phase shifters. These applications are feasible when using available ferromagnetic materials for the resonators.
Article
Nanoscience & Nanotechnology
Baiying Taishi, Yating Yang, Xueqi Wu, Jianchun Xu, Shanguo Huang
Summary: This article presents, optimizes, and measures a novel 3D electrically small antenna with dual-band. The optimized antenna works in 0.789 GHz and 1.183 GHz, showing simulated results similar to measured results, meeting the miniaturization requirements of modern wireless communication systems.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Optics
E. Aban Chenui, Alain M. Dikande
Summary: This study proposes a scheme for generating quantum photosoliton states by coupling linear photon fields to a vector high-intensity optical field with coexisting bright and dark solitons. The characteristics of the probe spectrum depend on the couplings of the linear photon field to the bright and dark soliton components of the vector-soliton pump, resulting in a rich variety of photosoliton modes. The findings show the potential for creating and manipulating quantum photosoliton states in optical materials with Kerr nonlinearity.
Article
Acoustics
Qianyi Chen, Jun Jiang, Zhibo Wang, Xin Chen, Shengyu Zhao, Huawei Zhang, Haihong Hu
Summary: In this paper, a system composed of a two-port waveguide and two quarter wavelength tubes (QWTs) with different cross section sizes is proposed. The narrow tube acts as the dark mode and the wide tube as the bright mode. By optimizing the interval between the tubes, perfect absorption can be achieved when sound waves are incident from the port close to the narrow tube. The system with two QWTs exhibits not only first order resonance but also high-order resonances, which can be utilized to develop a muffler with near-perfect broadband absorption.
Article
Optics
Zekun Lin, Lu Ding, Shaolin Ke, Xun Li
Summary: This study demonstrates a versatile approach to generate and control the non-Hermitian skin effect for photons using synthetic gauge fields. By utilizing indirectly coupled optical ring resonator arrays with long-range couplings and on-site gain and loss, the researchers have validated the appearance of the skin effect under certain conditions and explored its properties and potential applications in propagation effects.
Article
Physics, Applied
Rowan S. Parker-Jervis, Sae June Park, John E. Cunningham
Summary: Finite-element methods were used to design and simulate a tunable terahertz band-stop filter based on coupled split-ring resonators integrated into a planar Goubau-line waveguide. Two split-ring resonators with different geometrical lengths and gap widths were designed to resonate at the same frequency, with controlled resonance splitting by adjusting the distance between them. Investigation of the coupling strength of the resonators as a function of relative separation revealed a dispersion relation showing anti-crossing of the coupled resonances as the cantilever bends.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Ali M. Albishi, Saleh A. Alshebeili, Omar M. Ramahi
Summary: This paper presents a sensitive microwave near-field sensor based on utilizing a three-dimensional capacitor within a planar split-ring resonator, which enhances sensitivity in detecting dielectric fluids. Experimental testing shows higher sensitivity in detecting the presence of chloroform and dichloromethane, as well as changes in fluid levels. The proposed sensor offers improved performance compared to planar resonators, with increased electric field enhancement and higher loaded-quality factor achievable.
IEEE SENSORS JOURNAL
(2021)
Article
Optics
Saumya Choudhary, Robert W. Boyd, J. E. Sipe
Summary: Several plasmonic nanoparticles can couple to form nonradiative dark and radiative bright modes through radiative coupling. We develop an analytical model to explain the formation of these modes in bilayers consisting of dipolar nanoantenna arrays. Our model includes near-field contributions and shows good agreement with finite-difference time-domain simulation results. Changing the material and geometrical parameters can vary the reflection and absorption spectra of the bilayers, making them useful for designing efficient spectral filters. By adjusting the phase between two counterpropagating normally incident fields, we can selectively excite these modes, which has applications in all-optical modulators and switches based on linear interferometric effects.
Article
Materials Science, Multidisciplinary
Ilya A. A. Eliseyev, Bogdan R. R. Borodin, Dmitrii R. R. Kazanov, Alexander V. V. Poshakinskiy, Maja Remskar, Sergey I. I. Pavlov, Lyubov V. V. Kotova, Prokhor A. A. Alekseev, Alexey V. V. Platonov, Valery Yu. Davydov, Tatiana V. V. Shubina
Summary: Synthesized micro- and nanotubes composed of TMDCs like MoS2 show potential for applications in nanophotonics due to their strong exciton luminescence and ability to act as whispering gallery microcavities at room temperature. The study focuses on a class of twisted tubes with a flattened cross-section that rotates along the tube axis. The results show the possibility of creating multifunctional tubular TMDC nanodevices that can amplify self-emitting light at adjustable frequencies.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Physics, Applied
Xingxing Zhan, Ying Zhang, Xiaohong Yan, Yang Xiao
Summary: Bright and dark magnon modes of an exchange-coupled ferromagnetic bilayer were studied, revealing that the occurrence of a dark mode requires equal frequencies for the two magnon modes, while the dark magnon mode is determined by both magnon frequencies and the strengths of magnon-photon and direct magnon-magnon coupling when direct magnon-magnon coupling is present. These results may be beneficial for future cavity magnonic experiments involving ferromagnetic bilayers.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Yifei Xu, Qi Song, Enen Li, Min Zhang, Zhenhua Sun, Tianwu Wang, Fang Liu, Peiguang Yan
Summary: An optical controlled THz modulator is proposed in this study, combining lead sulfide (PbS) quantum dots with subwavelength metallic split-ring resonators (SRRs) to provide field enhancement. The modulation depth reaches 60.3%, which is approximately 3 times larger than the PbS quantum dots film without SRRs (as reference) in the frequency range of 0.1-1.1 THz. The significant enhanced THz modulation is mainly attributed to the local THz field enhancement caused by the SRRs, consistent with the simulation result.
Article
Engineering, Electrical & Electronic
Yazusha Sharma, Rukhsar Zafar, Sanjeev Kumar Metya, Vinay Kanungo
Summary: This study presents a Plasmonic sensor based on coupled split ring resonators, featuring dual Fano resonances, ultra-narrow line width, and high Quality factor. The sensor design shows excellent sensitivity and resolution for optical glucometer applications, as well as potential uses in chemical sensing and various biological applications.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
V. P. Sarin, Rohith K. Raj, Vasudevan Kesavath
Summary: This paper proposes and verifies the Dipole-Induced Transparency (DIT) in the microwave frequency regime through experimental and simulation studies. By using a single-layer mirrored Split-Ring Resonator (SRR) array configured in the H-perpendicular to excitation scenario, an out-of-phase oscillating electric dipole moment is created, resulting in the nullification of far-field scattering and the emergence of a transparency window. The computational validation of the results is conducted using multipole scattering theory, while numerical analysis and experimental measurements are used to study the coupling effects and the manifestation of the transparency window.
JOURNAL OF COMPUTATIONAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Delun Zhou, Yong Zhang, Shengqi Shi, Jinyu Zhang, Ruifeng Yue, Yan Wang
Summary: In this article, the use of microstrip ring resonators for measuring the dielectric constant of substrate materials is investigated. The simulation and experiments show that when the dielectric thickness is very small, the electromagnetic wave resonates in the microstrip line instead of the traditional microstrip ring. By extracting the reflection coefficient, the dielectric constant of the substrate material can be determined.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2022)
Article
Chemistry, Analytical
Jianguo Hu, Goktug Yesilbas, Yuanyuan Li, Xiangshun Geng, Ping Li, Jing Chen, Xiaoming Wu, Alois Knoll, Tian-Ling Ren
Summary: With the increasing application of quartz crystal microbalance (QCM) sensors in various fields, there is a need for sensors with higher mass sensitivity. This study explores the use of overtone modes to increase the resonance frequency and thus improve the mass sensitivity of QCM sensors. The experimental results show that the overtone mass sensitivity is slightly more than n times that of the fundamental mass sensitivity, which is consistent with theoretical calculations.
ANALYTICAL CHEMISTRY
(2022)
Article
Optics
Dmitry Kouznetsov, Ongun Arisev, Pol Van Dorpe, Niels Verellen
Summary: This paper explores the use of inverse design methods for generating periodic optical patterns in photonic integrated circuits. It highlights the importance of a carefully selected objective function based on the integer lattice method for successful device design. Additionally, a polychromatic pattern generating device that switches between optical lattices with different symmetry and periodicity depending on the operating wavelength is presented. The study also establishes important connections between optical coherent lattices and optical potentials, suggesting practical applications in quantum simulations and computing, optical trapping, and bio-sensing.
Article
Physics, Multidisciplinary
Lu Jiang, Cun Xue, Stefan Marinkovic, E. Fourneau, Tie-Quan Xu, Xin-Wei Cai, N. D. Nguyen, A. Silhanek, You-He Zhou
Summary: Topology is crucial for understanding the physical properties of superconductors. In this study, magnetic flux avalanches in superconducting films with multiply-connected geometries were experimentally studied using magneto-optical imaging technique. A domino effect was observed, where avalanches triggered at the outer ring stimulated avalanches at the inner ring, impairing the expected magnetic shielding. Numerical simulations showed that this effect was not caused by heat conduction, but mainly due to the variation in local current distribution near the preceding flux avalanche in the outer ring, leading to a ripple effect on the local magnetic field profile in the gap. The domino effect of thermomagnetic instabilities could be switched on/off by adjusting the environmental temperature and the gap width between the concentric rings.
NEW JOURNAL OF PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Zhihao Wang, Jinping Chen, Tianjun Yu, Yi Zeng, Xudong Guo, Shuangqing Wang, Timothee Allenet, Michaela Vockenhuber, Yasin Ekinci, Guoqiang Yang, Yi Li
Summary: Nonchemically amplified resists based on polystyrene modified with triphenyl sulfonium triflate groups were prepared. The level of sulfonium groups could be controlled by changing the feed ratio of raw materials, resulting in two different resists with sulfonium ratios of 50% and 70%. The PSTS0.7 resist exhibited a better resolution (18 nm half-pitch) compared to the PSTS0.5 resist (20 nm half-pitch) under the same developing conditions for electron beam lithography.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Robin R. Jones, Cornelia Miksch, Hyunah Kwon, Coosje Pothoven, Kristina R. Rusimova, Maarten Kamp, Kedong Gong, Liwu Zhang, Tim Batten, Brian Smith, Alejandro V. Silhanek, Peer Fischer, Daniel Wolverson, Ventsislav K. Valev
Summary: Against the backdrop of current healthcare and climate emergencies, surface enhanced Raman scattering (SERS) is gaining popularity as a technique for identifying and fingerprinting molecules in various substances. Researchers have investigated plasmonic nanohelices and found that they possess excellent SERS properties. These nanohelices can be produced at a low cost, exhibit strong and uniform Raman enhancement effects, and are anticipated to have broad applications in surface enhanced Raman spectroscopies and material science.
ADVANCED MATERIALS
(2023)
Article
Physics, Multidisciplinary
Liping Zhang, Zuyu Xu, Xiaojie Li, Xu Zhang, Mingyang Qin, Ruozhou Zhang, Juan Xu, Wenxin Cheng, Jie Yuan, Huabing Wang, Alejandro V. Silhanek, Beiyi Zhu, Jun Miao, Kui Jin
Summary: High quality Nb films on both flexible polyimide (PI) and rigid Al2O3 substrates were studied. Curved Nb/PI film exhibits different superconducting transition and vortex dynamics compared to flat Nb/Al2O3 film due to gradient distribution of vortex density and variation of superconductivity. Reentrant superconductivity was induced in curved Nb/PI film by vortex pinning from both in-plane and out-of-plane vortices. These findings provide important insights for theoretical investigations and practical developments of flexible superconductors.
Article
Nanoscience & Nanotechnology
Iakov Goldberg, Nirav Annavarapu, Simon Leitner, Karim Elkhouly, Fei Han, Niels Verellen, Tibor Kuna, Weiming Qiu, Cedric Rolin, Jan Genoe, Robert Gehlhaar, Paul Heremans
Summary: In this work, an all-solution fabrication approach for external second-order 1D distributed feedback (DFB) gratings using soft UV-nanoimprint lithography (UV-NIL) above archetypical methylammonium lead iodide (MAPbI3) perovskite films is presented. Through this method, high-gain strong-scattering perovskite films can exhibit amplified spontaneous emission, random lasing, and 1D DFB lasing under stripe-shaped optical excitation. The integration of a thin absorbing indium tin oxide (ITO) film between the perovskite film and the DFB grating enables reproducible achievement of low-threshold, narrow linewidth, and strongly polarized optically pumped DFB lasing for MAPbI3 waveguides.
Article
Physics, Applied
S. Marinkovic, E. A. Abbey, D. A. D. Chaves, S. Collienne, E. Fourneau, L. Jiang, C. Xue, Y. H. Zhou, W. A. Ortiz, M. Motta, N. D. Nguyen, A. Volodin, J. Van de Vondel, A. V. Silhanek
Summary: We investigated targeted and localized material modifications produced by electropulsing on Al-capped Nb microbridges. The affected areas showed a decrease in work function, but little morphological change was observed. The extent of the modified regions was strongly influenced by terminal geometry, and modeling estimated a threshold temperature of 435 +/- 35 K for inducing material modifications. These findings provide insights into subtle modifications and progress in nanofabrication techniques.
PHYSICAL REVIEW APPLIED
(2023)
Article
Materials Science, Multidisciplinary
Emile Fourneau, Jon Ander Arregi, Aleix Barrera, Ngoc Duy Nguyen, Simon Bending, Alvaro Sanchez, Vojtech Uhlir, Anna Palau, Alejandro V. V. Silhanek
Summary: This study investigates the effects of downsizing magnetic metamaterials for on-chip integration. The non-linear magnetic response of ferromagnetic components, magnetic irreversibility, formation of magnetic domains, and the geometry and size of devices are analyzed. The results show that implementing metasurfaces at the microscale can enhance the performance of magnetic field detectors and enable remote charging of small electric devices, opening up new possibilities in information and communication technologies.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Peipei Tao, Qianqian Wang, Michaela Vockenhuber, Da Zhu, Tianqi Liu, Xiaolin Wang, Ziyu Hu, Yimeng Wang, Jianlong Wang, Yaping Tang, Yasin Ekinci, Hong Xu, Xiangming He
Summary: This study presents the realization of zinc-based nanoparticle liquids and their potential for controlled nanofabrication. By utilizing the metal-core charge shielding strategy, nanoparticles with liquefaction characteristics and excellent film-forming capabilities were prepared. These nanoparticles also demonstrated controlled top-down nanofabrication.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Qianqian Wang, Yuting Zhou, Xiaolin Wang, Hongqiang Gao, Zhiwen Shu, Ziyu Hu, Peipei Tao, Yasin Ekinci, Michaela Vockenhuber, Yiqin Chen, Huigao Duan, Hong Xu, Xiangming He
Summary: High-resolution patterning has been achieved by suppressing residues caused by secondary electron diffusion using a free radical quencher in a highly sensitive zirconium-containing photoresist. This novel approach effectively improves resolution and edge roughness, as well as enhances patterning contrast.
Article
Nanoscience & Nanotechnology
Yake Wang, Jinping Chen, Yi Zeng, Tianjun Yu, Shuangqing Wang, Xudong Guo, Rui Hu, Peng Tian, Michaela Vockenhuber, Dimitrios Kazazis, Yasin Ekinci, Yanqing Wu, Shumin Yang, Jun Zhao, Guoqiang Yang, Yi Li
Summary: In this study, a series of molecular resists based on a bis(4-butoxyphenyl) sulfone core attached to a varying number of radiation-sensitive triphenylsulfonium units were designed and synthesized. These resists showed high resolution and low line edge roughness in both e-beam and EUV lithography. The exposure mechanisms and outgassing behavior of the resists were investigated, and they exhibited high etch resistance and accurate pattern transfer capabilities. The results highlight the potential of these resists for practical applications in high-resolution lithography.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Stefan Marinkovic, Edoardo Trabaldo, Simon Collienne, Floriana Lombardi, Thilo Bauch, Alejandro V. Silhanek
Summary: We conducted experiments on the displacement of oxygen vacancies at high current densities in YBa2Cu3O7-delta films grown on MgO substrates. Our findings indicate that the onset of vacancy migration is determined by local temperature rather than activation energy. We also observed an intermediate phase characterized by a decrease in resistivity before long-range migration of vacancies.
Article
Engineering, Electrical & Electronic
Scott M. Lewis, Hayden R. Alty, Michaela Vockenhuber, Guy A. DeRose, Antonio Fernandez-Mato, Dimitrios Kazazis, Paul L. Winpenny, Richard Grindell, Grigore A. Timco, Axel Scherer, Yasin Ekinci, Richard E. P. Winpenny
Summary: A new class of negative-tone resist materials based on heterometallic rings has been developed and the sensitivity of the resist has been improved by incorporating HgCl2 and HgI2 into the molecular design.
JOURNAL OF MICRO-NANOPATTERNING MATERIALS AND METROLOGY-JM3
(2022)
Article
Chemistry, Multidisciplinary
Lukas Ohnoutek, Ben J. Olohan, Robin R. Jones, Xuezhi Zheng, Hyeon-Ho Jeong, Ventsislav K. Valev
Summary: This article introduces the application of hyper-Rayleigh scattering optical activity (HRS OA) method in analyzing chiral solutions/suspensions. The experiments demonstrate that the HRS OA method can accurately distinguish between the two chiral forms of silver nanohelices without involving interactions between nanoparticles. In addition, the method is robust against the chirp of ultrafast pulses and exhibits high sensitivity.
