{"title":"Stimuli-Configuring Anisotropic Soft Architectures towards Dynamic Manipulable Photonics","authors":"Xiaoqian Wang, Zhi-Gang Zheng","doi":"10.1002/apxr.202400145","DOIUrl":"10.1002/apxr.202400145","url":null,"abstract":"<p>This review provides a comprehensive examination of stimuli-configuring anisotropic soft architectures, specifically, stimuli-responsive liquid crystal (LC) artificial micro- and nano-structures, highlighting their unique properties, recent advancements, and diverse applications toward dynamic manipulable photonics. It begins by introducing the fundamentals of LCs, including their classification, key properties, and theoretical modeling approaches. The paper delves into various stimuli—electric fields, light, temperature, and mechanical forces—that trigger changes in LC behavior, with a particular emphasis on photo-responsive systems. In-depth discussions cover electrically driven LC structures, exploring their applications in display technologies and beyond, for example, virtual/augmented reality, holography, and geometric phase optical elements such as lenses, beam shaping and beam steering devices. Light-driven LC structures are analyzed for their remote-control capabilities and roles in switchable optical elements and particle manipulation. The review also examines thermo-responsive and mechanically responsive LC systems, showcasing advanced structures that integrate multiple stimuli for enhanced functionality. Throughout the article, cutting-edge research and innovative applications are highlighted, demonstrating the significant potential of stimuli-responsive LC structures in fields such as optics, photonics, sensing, and information processing. This synthesis of current advancements emphasizes the versatility and adaptability of LCs in responding to various external inputs, paving the way for future technological innovations.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400145","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143920014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Conformal Transmissive Metasurface with Dual-Band Dual-Circularly Polarized Conversion and Low Scattering","authors":"Zhihao Li, Sijia Li, Chengyuan He, Yuhao Wu, Liqiu Hu, Zhiyun Zhang, Tong Li, Huanhuan Yang","doi":"10.1002/apxr.202400176","DOIUrl":"10.1002/apxr.202400176","url":null,"abstract":"<p>Generally, the existing metasurfaces are periodically or non-periodically planar micro-structures, which hardly satisfy the practical applications such as stealth aircraft, carrier and so on. In order to meet the application, a conformal transmissive metasurface are proposed with multi-function of converting linear polarization into dual-circular polarization in dual-band and low scattering for incidences. The metasurface composed of a non-metallic dielectric material of polyvinyl chloride and the ultra-thin conventional material to achieve a flexible configuration. The mechanism is illustrated by the characteristic parameters, electric field distributions, and equivalent circuit. The simulated results demonstrate that the metasurface can transform <i>y</i>-polarized waves into right-handed circularly polarized waves in 6.8–10.3 GHz and to left-handed circularly polarized waves in 18.77–21.15 GHz, while vice versa for <i>x</i>-polarized waves. Additionally, the conformal metasurface shows an excellent scattering section reduction in operational frequency and that above 10 dB can be realized as the frequency increases. A conformal metasurface sample is fabricated by the printed circuit board (PCB) and 3D printing technology, which is measured in a microwave anechoic chamber that conforms to the simulated results. The conformal transmission metasurface holds significant promise for applications in radomes and electromagnetic shielding.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 6","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400176","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144273522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Miniaturized Mechanical Antennas: Advances, Challenges, and Future Directions","authors":"Hao Ren","doi":"10.1002/apxr.202400074","DOIUrl":"10.1002/apxr.202400074","url":null,"abstract":"<p>In the past decade, miniaturized mechanical antennas have become a research focus. Several types of mechanical antennas based on different operation principles, including mechanical antennas based on magnetoelectric effect, mechanical antennas based on permanent magnets, mechanical antennas based on electrets, and mechanical antennas based on piezoelectric resonators, are presented, all with sizes significantly smaller than conventional electrical antennas operating at the same resonant frequencies. This review focuses on the advances in mechanical antennas, potential applications as well as challenges and potential future directions for further performance improvement. Although the sizes of the state-of-the-art mechanical antennas are several orders of magnitude smaller than traditional electrical counterparts with the same resonant frequencies, the reported maximum operation distance of mechanical antennas is still short, which is a major challenge for it to be widely implemented. By adopting new materials for mechanical antennas, adopting array configurations, adopting receiving antennas with higher sensitivity, and building new electromagnetic-electromechanical coupled simulation methods, the maximum operation distance may be significantly improved, making mechanical antennas widely implemented in the Internet of Things (IoT), wireless sensor networks (WSN), implantable medical devices (IMD), and portable electronics applications.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400074","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Unveiling the Electronic Properties and Growth Mechanisms of 2D Layered Materials on Au Foils through Scanning Tunneling Microcopy/Spectroscopy Studies","authors":"Wenzhi Quan, Yujin Cheng, Haoxuan Ding, Yanfeng Zhang","doi":"10.1002/apxr.202400162","DOIUrl":"10.1002/apxr.202400162","url":null,"abstract":"<p>2D van der Waals layered materials, represented by transition metal dichalcogenides (TMDCs), graphene, and <i>h</i>-BN, have garnered worldwide research interests due to their unique structures and fascinating physical properties distinct from their bulk counterparts. Featuring superior controllability and scalability, bottom-up synthetic approaches, including chemical vapor deposition, molecular beam epitaxy, etc., are widely adopted for preparing high-quality 2D materials and their heterostructures. In these efforts, Au foils are utilized as favorable substrates due to their chemical inertness, strong interfacial interactions that facilitate epitaxial growth of adlayers, and conductive nature that enables in situ characterizations. Herein, this review summarizes the recent advances in the bottom-up syntheses of 2D materials on Au foils, including the epitaxial growth of single-crystal TMDCs monolayers, the construction of 2D vertical heterostructures, and the preparation of 2D materials with novel phases/structures. Meanwhile, this article also reviews the in situ scanning tunneling microscopy/spectroscopy characterizations of the growth systems, with particular emphasis on unveiling the epitaxy mechanisms of layered single crystals, the stacking configurations of heterostructures, and their intriguing electronic properties. Finally, future opportunities are prospected from the viewpoints of novel phase/structure design, clean transfer, and property explorations of 2D materials on Au substrates.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400162","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Larisa Patlagan, George M. Reisner, Bertina Fisher
{"title":"Revealing Resistive Switching of Phase Transitions in an Al-Doped Single Crystal of VO2 by DC and Pulsed Electrical Measurements","authors":"Larisa Patlagan, George M. Reisner, Bertina Fisher","doi":"10.1002/apxr.202400112","DOIUrl":"10.1002/apxr.202400112","url":null,"abstract":"<p>The simple phase diagram of pure VO<sub>2</sub> consisting of an insulating monoclinic M1 phase and a metallic tetragonal R phase with a steep insulator-metal-transition (IMT) at TIMT = 340 K, is enriched by two additional insulating phases, a triclinic (T) and a monoclinic (M2) and multiple phase transitions, when strained or doped with M3<sup>+</sup>ions (M = Ga, Al, Cr, Fe, Mg). Under low-current R(T) measurements, the T(M1 → M2) and IMT are the only once detected by X-ray diffraction that show reproducible resistive switching (RS) and hysteresis typical of first-order transitions. Following the surprising detection of the RS associated with the M1→T transition induced by a high electric field in Ga-, Al-, and Cr-doped VO<sub>2</sub> crystals, we attempted to uncover those associated with additional transitions in Al-doped VO<sub>2</sub> nanostructures, as reported by Strelcov et al., Nano Letters 2012. Reported herein is the investigation of a single crystal of nominal Al<sub>0.01</sub>V<sub>0.99</sub>O<sub>2</sub> composition, by repeated direct current (DC) and pulsed IV measurements at fixed ambient temperatures below and at room temperature (RT). RS associated with the various phase transitions appeared in the nonlinear I(V) regime induced by self-heating (Joule heating), including all those that are absent under low-electric-current measurements.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400112","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143380730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Roadmap on Weak Measurements in Optics","authors":"Ritwik Dhara, Niladri Modak, Shyamal Guchhait, Nirmalya Ghosh","doi":"10.1002/apxr.202400136","DOIUrl":"10.1002/apxr.202400136","url":null,"abstract":"<p>Even though weak measurements and weak value amplification (WVA) are founded on the principles of quantum mechanics and quantum measurements, these have found widespread applications in optics due to their inherent origin in wave interference. Besides their use in addressing foundational questions of quantum mechanics or for resolving quantum paradoxes, weak measurements and WVA have thus been used for numerous metrological applications, e.g., quantification of small optical beam displacement, tiny angular rotation, determination of extremely small phase shifts, spectral shifts, unraveling weak fundamental optical effects, improved optical imaging, amplifying weak signal and extracting small physical parameters and so forth. In this review, after providing the mathematical foundation of weak measurement and WVA, some of the metrological applications of weak measurements in the classical optics domain are briefly summarized, and the controversies and debates on the potential advantages of WVA in the estimation and detection of weak signal are discussed, and the interferometric philosophy of WVA is elucidated. The experimental weak measurement and WVA schemes in the domain of quantum optics are also discussed and highlighted the new perspectives and emerging trends of weak measurements in both the classical and quantum optics domain and their prospects in the development of next-generation ultra-sensitive optical devices.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400136","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Proof-of-Concept for Selective Magnetization Switching for Microfabricated Exchange-Spring Magnets by Spin Wave Excitation","authors":"V. K. Kushwaha, T. Yamazaki, T. Seki","doi":"10.1002/apxr.202400160","DOIUrl":"10.1002/apxr.202400160","url":null,"abstract":"<p>This paper presents a proof-of-concept for selective magnetization switching in microfabricated elements with <i>L</i>1<sub>0</sub>-FePt/Ni<sub>81</sub>Fe<sub>19</sub> (permalloy; Py) exchange-coupled bilayers, known as exchange-spring magnets, by exciting spin wave dynamics. Although the resonance frequency of the perpendicular standing spin wave mode definitely can be tuned by varying the Py layer thickness or the aspect ratio of the element, considering the requirements of selective magnetization switching, it is found that the frequency tuning by varying the aspect ratio is suitable. The spin wave-assisted magnetization switching (SWAS) experiments for the different aspect ratios reveal the condition for the switching field reduction for each aspect ratio. Thanks to the different resonance frequencies between the different aspect ratios, the selective nature of SWAS method is experimentally demonstrated. The findings involve the contribution of higher-order spin wave dynamics, and emphasize the significance of adjusting the aspect ratio of elements to realize selective magnetization switching, offering potential applications in multilevel recording media.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400160","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Strauß, R. Gourgues, M. F. X. Mauser, L. Kulman, M. Castaneda, A. Fognini, A. Shayeghi, P. Geyer, M. Arndt
{"title":"Superconducting Nanowire Detection of Neutral Atoms and Molecules via Their Internal and Kinetic Energy in the eV Range","authors":"M. Strauß, R. Gourgues, M. F. X. Mauser, L. Kulman, M. Castaneda, A. Fognini, A. Shayeghi, P. Geyer, M. Arndt","doi":"10.1002/apxr.202400133","DOIUrl":"10.1002/apxr.202400133","url":null,"abstract":"<p>Superconducting nanowires are widely recognized as exceptional sensors in photonics, information processing, and astronomy. Even a single infrared photon can break Cooper pairs, generate a hot spot and trigger a measurable quantum phase transition. Here, it is demonstrated that this detection capability is far more versatile. Ultrathin nanowires are shown to be sensitive to the internal energy of atoms as well as to the kinetic energy of neutral molecules, here within the energy range of 10–20 and 3–6 eV, respectively. Superconducting nanowires achieve higher detection quantum yields than channel electron multipliers in the detection of metastable atoms and they surpass the efficiency of secondary electron detectors by more than a factor of 10<sup>6</sup> in the detection of molecules at impact energies below 5 eV. This remarkable sensitivity paves the way for new applications in atomic and molecular beam physics, establishing nanowires as a crucial tool for future precision measurements.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400133","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143380749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xudong Qi, Lang Bian, Da Huo, Kai Li, Huashan Zheng, Jinpeng Ma, Limei Zheng
{"title":"Domain Switching Dynamics in Relaxor PNN–PZT Ceramics With Nano-Domain Morphology","authors":"Xudong Qi, Lang Bian, Da Huo, Kai Li, Huashan Zheng, Jinpeng Ma, Limei Zheng","doi":"10.1002/apxr.202400143","DOIUrl":"10.1002/apxr.202400143","url":null,"abstract":"<p>The dynamic behavior of domain switching and hysteresis characteristics remain critical considerations for ferroelectric materials. Investigations in this area are of substantial importance for the physical understanding and emerging applications of ferroelectrics. This study investigates the domain switching dynamics in Pb(Ni<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>–PbZrO<sub>3</sub>–PbTiO<sub>3</sub> (PNN–PZT) ceramics by comparing domain switching hysteresis behavior of the non-textured samples to the textured ones. The scaling relations of hysteresis area <<i>A</i>> with respective to electric field <i>E</i><sub>0</sub> and frequency <i>f</i> can be expressed as <A>∝<i>f<sup>α</sup>E</i><sub>0</sub><i><sup>β</sup></i>. The results indicate that the introduction of templates suppresses domain switching under low electric field and high-frequency conditions owing to the clamping effect induced by interfacial stresses between templates and the matrix. Furthermore, a relaxation model for polarization reversal and domain switching is employed to clarify the physical mechanism of <<i>A</i>>-<i>f</i> dependence by considering the domain morphology of the ceramics. The findings suggest that the dispersed nano-domain morphology within PNN–PZT ceramics results in a flatter relaxation function distribution, thereby enhancing domain switching response concerning <i>f</i>. This study not only provides a deep understanding of domain switching dynamics in ferroelectric materials but also gives important inspiration for the design of ferroelectric ceramics with high performance.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 4","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400143","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}