Article
Materials Science, Ceramics
R. Marcelli, G. Capoccia, G. M. Sardi, G. Bartolucci, B. Margesin, J. Iannacci, G. Tagliapietra, F. Giacomozzi, E. Proietti
Summary: In this paper, the use of metamaterial and microsystem concepts for studying resonating structures in narrowband microwave signal processing is explored. U-shaped resonators and triangular Sierpinski structures are designed and tested for potential applications in satellite communications at the K-Band frequencies of around 20 GHz and 26 GHz. The research discusses the metamaterial nature and electrical performance of these structures, including the possibility of implementing U-shaped resonators using RF MEMS. The paper also presents the novelty of achieving a tunable narrow-band filter in an all-passive environment by embedding switches in the resonator, and examines the advantages and drawbacks of this solution.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Ye-Jin Kim, Yangjin Lee, WonJae Choi, Myeongjin Jang, Won-Woo Park, Kwanpyo Kim, Q-Han Park, Oh-Hoon Kwon
Summary: The strong interaction between light and matter is utilized to shape two-dimensional materials into nanoscale architectures. By controlling the light fields, ultrafine nanostructures of black phosphorus are achieved. Nanoribbons and nanocubes/cuboids with sizes in the tens of nanometers scale are formed via tailored ablation along tightly confined periodic light fields.
Article
Chemistry, Analytical
Matko Martinic, Tomislav Markovic, Adrijan Baric, Bart Nauwelaers
Summary: This study proposes a novel CSRR metamaterial structure for label-free dielectric spectroscopy of liquids in microplates, demonstrating scalability and potential for large-scale microplate experiments through the combination of sensor arrays and microplates.
Article
Optics
Jiahao Hu, Chaoying Zhao
Summary: This paper investigates the influence of the internal structure of nonlinear plasma metamaterial cells on the enhancement of the second harmonic and proposes an expanded harmonic oscillator model to explain the generation process of the enhanced second harmonic. The theoretical conversion efficiency of the second harmonic is obtained by calculating the nonlinear coefficients, and the validity of the proposed model is verified through simulation results. The research results are of great significance for analyzing nonlinear phenomena in metamaterials with complex cell structures.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Article
Optics
Shiyu Zhang, Mengyao Qin, Botao Wu, E. Wu
Summary: We designed all-dielectric pi-shaped Si metamaterials and demonstrated their electromagnetically induced transparency (EIT) behavior through numerical simulation. The metamaterial consists of horizontal and vertical Si nanobars with nanogaps between them, resulting in a narrow EIT peak. The EIT can be tuned by changing the nanogap width, and the metamaterial is sensitive to the refractive index change with a high figure-of-merit.
OPTICS COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Xiongbin Yu, Yusei Suzuki, Mai Van Ta, Safumi Suzuki, Masahiro Asada
Summary: A novel and highly efficient RTD integrated with a square split ring resonator (SRR) was successfully fabricated, achieving an oscillation frequency of 1.22 THz and a maximum output power of 30 μW at room temperature. The use of coplanar stripline antennas increased the radiation efficiency, and the experimental results were in good agreement with simulations, promoting further studies on THz metamaterials.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Optics
Jin Leng, Jun Peng, An Jin, Duo Cao, Dejun Liu, Xiaoyong He, Fangting Lin, Feng Liu
Summary: The study found that changes in asymmetry significantly impact the Q factor and depth of amplitude modulation of Fano resonance, the carrier concentration of silicon plays a significant role in the intensity of excited Fano resonance, and a uniform graphene layer can effectively modulate Fano resonance.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Raktim Sarma, Nishant Nookala, Kevin James Reilly, Sheng Liu, Domenico de Ceglia, Luca Carletti, Michael D. Goldflam, Salvatore Campione, Keshab Sapkota, Huck Green, George T. Wang, John Klem, Michael B. Sinclair, Mikhail A. Belkin, Igal Brener
Summary: Dielectric metasurfaces show potential in both fundamental studies of light-matter interactions and various applications, demonstrating strong polaritonic coupling and the ability to tailor coupling strength, making them ideal candidates for novel mid-infrared light sources.
Article
Nanoscience & Nanotechnology
Yeming He, Yang Ma, Xuhong Li, Yongzhe Zhang
Summary: All-inorganic perovskites have gained attention in optoelectronic devices due to their stability, high light absorption, and energy conversion efficiency, with 2D structures exhibiting higher carrier recombination efficiency and exciton binding energy. However, difficulties persist in fabricating large-sized samples with high crystal quality due to the nonlayered structure.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jingang Li, Mingsong Wang, Zilong Wu, Huanan Li, Guangwei Hu, Taizhi Jiang, Jianhe Guo, Yaoran Liu, Kan Yao, Zhihan Chen, Jie Fang, Donglei Fan, Brian A. Korgel, Andrea Alu, Yuebing Zheng
Summary: A study has reported reconfigurable chiral nanostructures with silicon nanoparticles and nanowires, allowing for tailored configurations and chiroptical responses. The optical chirality arises from the coupling between optical resonances of the silicon nanoparticle and nanowire, enabling label-free enantiodiscrimination of biomolecules in single structures. This research provides insights into high-index material design and new strategies for adaptive devices in photonic and electronic applications.
Article
Physics, Applied
Guangwei Hu, Chunqi Zheng, Jincheng Ni, Cheng-Wei Qiu, Andrea Alu
Summary: In analogy to Lifshitz transitions in electronic systems, topological transitions have recently attracted attention in photonics, enabling exotic regimes for light-matter interactions. This study explores enhanced photonic local density of states in twisted hyperbolic bilayers, highlighting the potential applications of topological transitions in photonics for manipulating radiative heat transfer and controlling light at the nanoscale.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
Yiyun Li, Bo Fang, Kai Yang, Yongxing Jin, Chenxia Li, Zhi Hong, Jianxun Lu, Yinglai Wu, Xufeng Jing
Summary: This study proposes a double-sided all-dielectric unit structure to achieve high-efficiency and independent control of the amplitude and phase of light transmitted from the coded metasurface. By adjusting the rotation angle of the elliptical cylinder and changing the radius of the cylinder, the phase and amplitude of the transmitted light can be controlled independently. Different sequences of encoded metasurfaces can be constructed by digitally encoding the unit structure with different rotation angles of the elliptical cylinder. The independent modulation of amplitude and phase of coding particles is verified through the far-field scattering characteristics of different coding metasurfaces.
OPTICS COMMUNICATIONS
(2022)
Review
Materials Science, Multidisciplinary
Ke Bi, Qingmin Wang, Jianchun Xu, Lihao Chen, Chuwen Lan, Ming Lei
Summary: All-dielectric metamaterials are a rapidly developing research hotspot in the field of metamaterials, offering low loss and design freedom. The proper choice of fabrication technique is crucial for efficient electromagnetic manipulation. This overview discusses existing fabrication techniques, including methods for different frequency bands and their respective advantages and disadvantages.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Wei Du, Youcheng Zhu, Zhendong Yan, Xiulian Xu, Xiaoyong Xu, Jingguo Hu, Pinggen Cai, Chaojun Tang
Summary: The theoretical study showed that magnetic plasmon resonances (MPRs) in a 3D metamaterial consisting of vertical Au split-ring resonators (VSRRs) array on Au substrate, coupled with propagating surface plasmon polaritons (SPPs), could generate an ultranarrow-band hybrid mode with significantly enhanced magnetic fields on the metal substrate. The proposed metamaterial exhibited high sensitivity (S = 830 nm/RIU) and figure of merit (FOM = 377), suggesting potential for label-free biomedical sensing applications.
Article
Materials Science, Multidisciplinary
Paul Goulain, Chris Deimert, Mathieu Jeannin, Stefano Pirotta, Wojciech Julian Pasek, Zbigniew Wasilewski, Raffaele Colombelli, Jean-Michel Manceau
Summary: Continuously graded parabolic quantum wells are used to overcome the limitations of square quantum wells at terahertz frequencies. Microcavity intersubband polaritons are formed at frequencies as low as 1.8 THz, with ultra-strong coupling sustained up to 200 K. The use of sub-wavelength resonators preserves the ultra-strong coupling regime, making it a potential approach for generating non-classical light.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Physics, Multidisciplinary
M. Berry, Wei Liu
Summary: Simple superpositions of Laguerre-Gauss beams highlight the difference between the component of orbital angular momentum in the propagation direction and the total topological charge. The examples demonstrate the contrasting situations where either the orbital angular momentum is zero but the total charge is not, or vice versa.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Optics
Dongying Wang, Yang Yu, Zhechun Lu, Junbo Yang, Zao Yi, Qiang Bian, Jianfa Zhang, Shangpeng Qin, Junjie Weng, Siyu Yao, Yang Lu, Xiaoyang Hu, Zhou Meng
Summary: In this paper, a D-shaped photonic crystal fiber-surface plasmon resonance (PCF-SPR) sensor based on the magneto-refractive effect is proposed to improve the sensing performance of optical fiber magnetic field sensor. The sensor has a simple structure and high magnetic field sensitivity, making it a promising alternative platform for biosensors.
Article
Optics
Cong Quan, Song Gu, Jinglan Zou, Chucai Guo, Wei Xu, Zhihong Zhu, Jianfa Zhang
Summary: In this paper, a phase change metamaterial for tunable infrared stealth and camouflage is proposed and numerically studied. The metamaterial combines high temperature resistant metal Mo with phase-changing material GST and can switch between infrared stealthy and non-stealthy states through the phase change process of GST. The relationship between the stealth performance and the polarization and incident angle of the incident light is also studied. This simple multilayer structure of the proposed metamaterial allows for large-scale fabrication.
Article
Optics
Yansong Fan, Zhihong Zhu, Janfa Zhang, Wei Xu, Fan Wu, Xiaodong Yuan, Chucai Guo, Shiqiao Qin
Summary: In this study, a visible graphene thermal emitter based on the metal Fabry-Perot (FP) cavity is reported. The emitter enhances the emissivity of graphene and protects it from oxidation. Furthermore, the wavelength and intensity of graphene emission can be controlled by tuning the dielectric thickness.
Article
Nanoscience & Nanotechnology
Qingdong Yang, Weijin Chen, Yuntian Chen, Wei Liu
Summary: This study investigates how optical gain or loss affects the ideal Kerker scattering of zero backward scattering. It was found that when specific-order multipoles perfectly match, it can affect the tuning of multipoles of the next two orders, and loss or gain can actually help eliminate backward scattering.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
You Sang, Jipeng Xu, Ken Liu, Wei Chen, Yong Xiao, Zhihong Zhu, Ning Liu, Jianfa Zhang
Summary: The study demonstrates the exceptional mechanical and optical properties of suspended metasurfaces, as well as their potential applications in optical systems, paving the way for the development of spatially nonreciprocal and bistable devices.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yansong Fan, Zhengzhuo Zhang, Zhihong Zhu, Jianfa Zhang, Wei Xu, Fan Wu, Xiaodong Yuan, Chucai Guo, Shiqiao Qin
Summary: This study presents a theoretical model to describe the relationship between graphene emission characteristics and gate voltages, and the experimental results are consistent with the model. The findings suggest that the spatial location of graphene emission can be regulated by gate voltages, which is beneficial for achieving spatial dynamic regulation of graphene infrared emission arrays.
Article
Chemistry, Multidisciplinary
Leshu Liu, Ken Liu, Ning Liu, Zhihong Zhu, Jianfa Zhang
Summary: Lithium niobate, an important optoelectronic and nonlinear material, is difficult to etch due to its stable chemical nature. Researchers have developed a high-reflectance Fano-resonant metasurface on lithium niobate by using novel etching methods, and demonstrated its application in constructing a Fabry-Perot cavity.
Article
Multidisciplinary Sciences
Jie Peng, Ruo-Yang Zhang, Shiqi Jia, Wei Liu, Shubo Wang
Summary: The central idea of metamaterials and metaoptics is to use the geometry of structures to achieve exotic optical functionalities. In this study, the researchers discovered that the topology of metal structures determines the topological properties of optical fields and offers a new dimension for optical functionalities independent of specific materials or structures. By mapping polarization singularities (PSs) to non-Hermitian exceptional points and using homotopy theory, they extracted the core invariant and conservation law that govern the topological classification and spatial evolutions of PSs.
Article
Nanoscience & Nanotechnology
Ning Liu, Xi Yang, Jianfa Zhang, Zhihong Zhu, Ken Liu
Summary: In this paper, we demonstrated the room-temperature transfer-free excitonic nanolaser array by embedding continuous monolayer WS2 between Si3N4 microdisks and Al2O3. Lasing at room temperature is achieved with the help of high-quality-factor Si3N4 microdisks and the physical vapor deposition method for growing 2D gain material directly. This work provides a practical solution for large-scale and low-cost TMDC-based nanolaser arrays in integrated optical communication systems.
Article
Chemistry, Multidisciplinary
Zhengzhuo Zhang, Qiaoge Sun, Yansong Fan, Zhihong Zhu, Jianfa Zhang, Xiaodong Yuan, Chucai Guo
Summary: Researchers propose and simulate a kind of graphene-based perfect absorber that can generate low-threshold and high-extinction-ratio optical bistability in the near-IR band. The perfect absorption greatly enhances the interaction between input light and monolayer graphene in the absorber. With a large nonlinear coefficient and strong light-graphene interaction, the structure exhibits relatively low switching thresholds and an ultrahigh extinction ratio. The proposed bistable structure with ultra-compact size, low thresholds, high extinction ratio, and ultrafast response time has promising applications in high-performance all-optical communication devices.
Article
Chemistry, Multidisciplinary
Qilin Hong, Jinbao Jiang, Siyu Zhou, Gongyu Xia, Ping Xu, Mengjian Zhu, Wei Xu, Jianfa Zhang, Zhihong Zhu
Summary: In this paper, a silicon-based on-chip Fano resonator with graphene nanoheaters is proposed and fabricated. The resonator has the characteristics of a high quality factor and low state-switching power, making it a viable option for large-scale tunable and low-power-consumption optical networks. It also has potential applications in optical filters and switches.
Article
Nanoscience & Nanotechnology
Jinbao Jiang, Feng Xiong, Linfeng Sun, Haitao Chen, Mengjian Zhu, Wei Xu, Jianfa Zhang, Zhihong Zhu
Summary: The search for new phase-change materials and understanding the phase transformation mechanism is important for memory and neuromorphic device applications. This study investigates the phase transformation of iron telluride (FeTe) starting from mechanically exfoliated van der Waals layers. The observed surficial amorphization and the reversibility of the phase transformation suggest potential applications of FeTe in neuromorphic devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Optics
Chunchao Wen, Jianfa Zhang, Shiqiao Qin, Zhihong Zhu, Wei Liu
Summary: This study investigates the extremizations of momentum-space scattering with respect to varying incident directions of plane waves from the perspective of quasi-normal modes (QNMs). It reveals that for effective single-QNM excitations, scatterings are maximized along those directions where the QNM radiation reaches its maximum, with matched incident and radiation polarizations. The principles revealed are protected by fundamental laws of reciprocity and energy conservation, which can be further expanded and applied for other branches of wave physics.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Wei Xu, Qilin Hong, Ping Liu, Jialong Peng, Biao Yang, Jianfa Zhang, Zhihong Zhu
Summary: This study proposes high quality, tunable unidirectional guided resonances (UGRs) based on a silicon-on-lithium niobate (Si-on-LN) photonic crystal (PhC) slab, achieving high Q factors by adjusting the position of the UGRs. In addition, a Gires-Tournois interferometer (GTI) based on a UGR with a Q factor of 9465 is demonstrated, with adjustable group delay and operation wavelengths by tuning the refractive index of lithium niobate (LN) and the periods of the silicon bars. This research may find applications in various areas such as PhC surface-emitting lasers, dispersion compensation, and compression of light pulses.
