Article
Materials Science, Multidisciplinary
Yongzhi Cheng, Jinxiu Wang
Summary: This paper presents a tunable terahertz circular-polarization (CP) convertor based on graphene metamaterial, which can achieve high efficiency polarization conversion at specific Fermi energy levels and be continuously adjusted for various applications.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Prince Jain, Arvind K. Singh, Janmejay K. Pandey, Shonak Bansal, Neha Sardana, Sanjeev Kumar, Neena Gupta, Arun K. Singh
Summary: In this study, an ultra-compact metamaterial absorber was proposed for microwave applications, exhibiting perfect absorption at multiple frequencies. The absorber's small size and thin thickness were demonstrated experimentally. By analyzing different parameters and incident angles, the absorption mechanism of the absorber was understood.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Touhidul Alam, Mohammad Tariqul Islam, Mohammad Lutful Hakim, Khalid H. Alharbi, Mandeep Singh Jit Singh, Muntasir M. Sheikh, Rabah W. Aldhaheri, Md. Shabiul Islam, Mohamed S. Soliman
Summary: The concept of nanosatellite technology is important for reducing cost and build time in earth and space observation research. The communication aspect of a satellite is crucial, and the antenna plays a key role in establishing a communication link between the nanosatellite and the earth. This paper proposes a compact metamaterial-based Ku-band antenna with circular polarization for nanosatellite communication, which has been tested and found suitable for integration with metallic and nonmetallic surfaces of miniature nanosatellites.
Article
Multidisciplinary Sciences
David Ayuso, Andres F. Ordonez, Piero Decleva, Misha Ivanov, Olga Smirnova
Summary: The study introduces the concept of using structured light's local chirality for efficient chiral discrimination without magnetic interactions, demonstrating the potential for novel applications in molecular fingerprinting and imaging. The authors report enantio-sensitive unidirectional light bending by interacting light with isotropic chiral media, showcasing the advancements in utilizing structured light for chiral recognition.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Quan-Wei Lin, Shaker Alkaraki, Hang Wong, James R. Kelly
Summary: This article presents a novel CP antenna based on an anisotropic metamaterial that can convert linear polarization to circular polarization over a wideband of frequencies in the X-band. The antenna consists of a metamaterial-based polarizer mounted above the aperture of a rectangular waveguide, oriented at 45 degrees to the waveguide's E-plane. The polarizer is composed of multiple metamaterial layers and incorporates rectangular split ring resonators on both sides of a dielectric slab. Impedance matching layers are introduced to enhance the axial-ratio bandwidth.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Quantum Science & Technology
Johannes Schall, Marielle Deconinck, Nikolai Bart, Matthias Florian, Martin Helversen, Christian Dangel, Ronny Schmidt, Lucas Bremer, Frederik Bopp, Isabell Huellen, Christopher Gies, Dirk Reuter, Andreas D. Wieck, Sven Rodt, Jonathan J. Finley, Frank Jahnke, Arne Ludwig, Stephan Reitzenstein
Summary: Self-organized semiconductor quantum dots are nearly ideal two-level systems with strong potential for applications in photonic quantum technologies. Coupled quantum dot systems, with increased functionality, can host ultra-stable singlet-triplet spin qubits for efficient spin-photon interfaces and for deterministic photonic 2D cluster-state generation. Advanced quantum dot molecule (QDM) devices show excellent single-photon emission properties, making them attractive building blocks for future photonic quantum networks.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
Article
Quantum Science & Technology
Si-Si Gu, Bao-Chuan Wang, Ming-Bo Chen, Ting Lin, Yuan Kang, Hai-Ou Li, Gang Cao, Guo-Ping Guo
Summary: The integration of quantum dots with a microwave resonator in the hybrid circuit quantum electrodynamics architecture has created a controllable artificial system and enriched physics through electron-photon interaction. The study investigates a hybrid device where a triple quantum dot is dipole coupled with the electric field of a superconducting quantum interference device array resonator. The results suggest that the hybrid system has the potential to investigate exotic many-body effects and matter-light interaction, depending on the relationship between various Coulomb energy in the quantum dot and the cavity photon energy.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Nanoscience & Nanotechnology
John Wellington John, Veerendra Dhyani, Sudarshan Singh, Alka Jakhar, Arijit Sarkar, Samaresh Das, Samit K. Ray
Summary: The study presents a CMOS-compatible infrared detector based on Ge quantum dots (QDs) decorated on a single Si nanowire channel on a silicon-on-insulator (SOI) platform with superior detectivity and low dark current. Ge QD-decorated nanowire devices exhibit high photoconductive gain, potentially indicating performance advantages in the infrared wavelength range.
Article
Engineering, Electrical & Electronic
Lu Liu, Tian Liu, Yu Zheng, Leonid F. Chernogor, Zhe-jun Jin, Zhongsen Sun
Summary: This paper presents a small aperture spiral antenna with circular polarization based on metamaterials. By adding split ring resonators, the antenna's performance at low frequencies is enhanced, and antenna miniaturization is achieved. The antenna has wide impedance and axial ratio bandwidths, making it suitable for applications in mobile communication, radar detection, and other fields.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Tariq Sheikh, Shabnum Maqbool, Parikshit Kumar Rajput, Pankaj Mandal, Angshuman Nag
Summary: The introduction of chirality in layered hybrid perovskites breaks the symmetry of their inorganic sub-lattices, resulting in intriguing optical properties. In this study, the effect of chirality on the excitonic photoluminescence of chiral (R- and S-alpha-MBA)(2)PbI4 at cryogenic temperatures was investigated. The induced chirality was found to split the excitonic emissions below 150 K. Additionally, (R- and S-alpha-MBA)(2)PbI4 exhibited wavelength-tunable second harmonic generation (SHG) that strongly depended on the polarization angle of the incident light.
CHEMICAL COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Yuan-Zhe Sun, Zi-Han Guo, Cheng-Jing Gao, Hai-Feng Zhang
Summary: This research demonstrates a linear-to-circular polarization conversion based on EIT technology with a metal-graphene metamaterial in the terahertz range. By adjusting the structure and doping graphene, polarization modulation and tunable transmission behaviors were achieved in the THz band.
Article
Materials Science, Multidisciplinary
Lifang Guo, Xiaoyu Li, Wenxiang Li, Chenchen Gou, Meifang Zheng, Yong Zhang, Zhiyu Chen, Yu Hong
Summary: A high sensitivity humidity sensor based on MoS2/GOQD composite film was proposed in this study. The sensor demonstrated high sensitivity, good repeatability, and long-term stability.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Physics, Applied
Zhimin Liu, Yipeng Qin, Fengqi Zhou, Shanshan Zhuo, Cheng Ji, Guangxin Yang, Yadong Xie, Ruihan Yang, Xin Luo
Summary: This study introduces a single-layer patterned graphene metamaterial, which achieves triple plasmon-induced transparency in the terahertz frequency range and implements a synchronized electro-optical switch with four modulation modes by adjusting graphene's Fermi level. The enhanced modulation degree and polarization insensitivity of the electro-optical switch offer a promising approach for designing optoelectronic devices.
MODERN PHYSICS LETTERS B
(2023)
Article
Optics
Xiaocan Xu, Ruijia Xu, Yu-Sheng Lin
Summary: The research proposes a design of tunable double split-ring metamaterial in the terahertz frequency range, demonstrating switchable characteristics between single-resonance and dual-resonance with polarization sensitivity, within the frequency range of 0.16 THz to 0.21 THz. Tunability and stability of DSRM can be achieved by changing the gap between two SRRs or the distance between face-to-face SRRs.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Runing Lai, Pengcheng Shi, Zao Yi, Hailiang Li, Yougen Yi
Summary: This paper introduces a novel metamaterial absorber based on surface plasmon resonance (SPR) that has triple-mode perfect absorption, polarization independence, incident angle insensitivity, tunability, high sensitivity, and a high figure of merit (FOM). The structure of the absorber consists of a graphene array, SiO2 layer, and a gold mirror. The absorber achieves perfect absorption at frequencies of 4.04 THz, 6.76 THz, and 9.40 THz, with absorption peaks of 99.404%, 99.353%, and 99.146%, respectively. It also demonstrates maximum sensitivities in refractive index sensing and has potential applications in photodetectors, optoelectronic devices, and chemical sensors.
Article
Physics, Condensed Matter
Maria Teresa Mercaldo, Mario Cuoco, Panagiotis Kotetes
PHYSICA B-CONDENSED MATTER
(2018)
Article
Nanoscience & Nanotechnology
Maria Teresa Mercaldo, Panagiotis Kotetes, Mario Cuoco
Article
Physics, Multidisciplinary
August E. G. Mikkelsen, Panagiotis Kotetes, Peter Krogstrup, Karsten Flensberg
Article
Physics, Multidisciplinary
Panagiotis Kotetes, Maria Teresa Mercaldo, Mario Cuoco
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Condensed Matter
Panagiotis Kotetes
Summary: This work demonstrates how to characterize topological phase transitions in BDI symmetry class superconductors using the approach of Berry singularity markers. The author applies this method to the Kitaev chain model and identifies pairs of external fields that can detect the topological charges of the Berry singularities responsible for the phase transitions.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Physics, Multidisciplinary
Yun-Peng Huang, Panagiotis Kotetes
Summary: We propose an alternative method to stabilize magnetic skyrmion textures by relying solely on the emergence of flux in the system's ground state, without the need for Dzyaloshinkii-Moriya interactions, magnetic anisotropy, or an external Zeeman field. We discuss the scenarios that lead to a nonzero flux and identify the accessible magnetic skyrmion ground states in its presence. Furthermore, we explore the chiral superconductors obtained for the surface states of a topological crystalline insulator when two types of magnetic skyrmion crystals coexist with a pairing gap. Our work opens up possibilities for minimal engineering of topological superconductivity and promises to discover functional topological materials and devices that may be more compatible with electrostatic control than the currently explored skyrmion-Majorana platforms.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Physics, Multidisciplinary
Daniel Steffensen, Morten H. Christensen, Brian M. Andersen, Panagiotis Kotetes
Summary: We present a detailed investigation of the topological phases and Majorana fermion (MF) excitations that arise from the bulk interplay between (un)conventional one- and two-band spin-singlet superconductivity and a number of magnetic texture crystals. Our analysis reveals a multitude of accessible topological phases with distinct edge modes, originating from the interplay between topological phases with gapped and nodal bulk energy spectra.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Jun-Ang Wang, Sen Zhou, Panagiotis Kotetes
Summary: Recent experiments have found evidence for chiral charge order in kagome superconductors. Researchers have discovered that a pyramidal heterostructure of superconductor/charge Chern insulator/superconductor can induce a one-dimensional spinless p-wave superconductor, allowing the pinning of Majorana zero modes (MZMs) at termination edges and domain walls. They have also shown that a double pyramidal hybrid can define a double MZM track, where braiding can occur by varying the superconducting phase differences in space and time.
Article
Materials Science, Multidisciplinary
Daniel Steffensen, Brian M. Andersen, Panagiotis Kotetes
Summary: The study proposes a mechanism for opening a full bulk energy gap and inducing vortex Majorana zero modes in nodal superconductors, achieved by coupling the nodal superconductor with a magnetic texture crystal. This generic approach is applicable to various types of nodal superconductors and holds promise for future applications.
Article
Materials Science, Multidisciplinary
Yun-Peng Huang, Jin-Wei Dong, Panagiotis Kotetes, Sen Zhou
Correction
Materials Science, Multidisciplinary
Panagiotis Kotetes
Article
Materials Science, Multidisciplinary
Keimei Sakurai, Maria Teresa Mercaldo, Shingo Kobayashi, Ai Yamakage, Satoshi Ikegaya, Tetsuro Habe, Panagiotis Kotetes, Mario Cuoco, Yasuhiro Asano
Article
Materials Science, Multidisciplinary
Dimitri Labat, Panagiotis Kotetes, Brian M. Andersen, Indranil Paul
Article
Materials Science, Multidisciplinary
Maria Teresa Mercaldo, Panagiotis Kotetes, Mario Cuoco
Article
Materials Science, Multidisciplinary
Daniel Steffensen, Panagiotis Kotetes, Indranil Paul, Brian Andersen
