Article
Optics
Hongxin Zeng, Sen Gong, Lan Wang, Kesen Ding, Huajie Liang, Feng Lan, Tianchi Zhou, Shixiong Liang, Wei Wang, Yubin Gong, Ziqiang Yang, Tie Jun Cui, Yaxin Zhang
Summary: Researchers have developed an integrated electronic device by embedding a tiny metasurface made of patterned 2DEG microstructures in a waveguide. This device enables high-speed modulation of guided terahertz waves on a time scale of 40ps, demonstrating a new platform for compact and high-speed integrated electronics.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Muhammad Talal Ali Khan, Haisu Li, Nathan Nam Minh Duong, Andrea Blanco-Redondo, Shaghik Atakaramians
Summary: The study presents a new method to enhance integrated terahertz systems performance utilizing topological photonic crystals, demonstrated by experimental validation of topological terahertz planar air-channel metallic waveguides. This technology, combining 3D printing and gold sputtering, shows significant performance improvements and robust transmission characteristics.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Physics, Multidisciplinary
Kun Zhang, Ya-Xian Fan, Lan-Lan Xu, Ting Liu, Huan Liu, Zhi-Yong Tao
Summary: A tunable flat-top broadband defect mode in the terahertz frequency range is proposed by inserting multiple defects into a periodic waveguide, resulting in a bandwidth of 38.3 GHz, over 21 times that of traditional defect modes. The broadband defect mode is attributed to the competition between Bragg scattering and local resonances in the coupling of multiple defect modes, providing potential applications in various THz systems as functional devices.
Article
Optics
Benwen Chen, Shengxin Yang, Jian Chen, Jingbo Wu, Ke Chen, Weili Li, Yihui Tan, Zhaosong Wang, Hongsong Qiu, Kebin Fan, Caihong Zhang, Huabing Wang, Yijun Feng, Yunbin He, Biaobing Jin, Xinglong Wu, Jian Chen, Peiheng Wu
Summary: Thermally activated Janus metasurfaces with phase change materials can produce designed phase delays, enabling reconfigurable THz Janus metasurfaces. This allows for asymmetric focusing of THz waves and directional THz holography with free-space image projections, and the information can be manipulated via temperature and incident THz wave direction. This research offers a common strategy for the reconfigurability of Janus metasurfaces and has potential applications in THz optical information encryption, data storage, and smart windows.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Multidisciplinary Sciences
Junliang Dong, Alessandro Tomasino, Giacomo Balistreri, Pei You, Anton Vorobiov, Etienne Charette, Boris Le Drogoff, Mohamed Chaker, Aycan Yurtsever, Salvatore Stivala, Maria A. Vincenti, Costantino De Angelis, Detlef Kip, Jose Azana, Roberto Morandotti
Summary: The authors propose a new approach for independent processing of multiplexed signals in terahertz waveguides by engineering the metal surface of a four-wire waveguide.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Applied
Arabinda Haldar, Adekunle Olusola Adeyeye
Summary: Magnonics is an emerging technology that uses magnons, quanta for spin waves, to process information similar to electronic charges in electronics. A bias magnetic field is typically utilized to align magnetization, hindering on-chip device integration capability, but strategies such as self-biased waveguides can eliminate this requirement. These bias-free waveguide strategies offer additional functionalities and have the potential for practical realizations in magnonics and electronic hybrid technology.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Yubo Liang, Guangqing Wang, Yan Cheng, Duo Cao, Dejun Yang, Xiaoyong He, Fangting Lin, Feng Liu
Summary: The tunable propagation properties of 3D Dirac semimetal-supported dielectric-loaded surface plasmons structures in the THz regime were investigated, and it was found that both the shape of the dielectric fiber and the Fermi level of the 3D DSM layer have significant influences on the hybrid mode, providing insights into the tunable mechanisms of 3D DSM plasmonic devices.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Hui Li, Chenglong Zheng, Hang Xu, Jie Li, Chunyu Song, Jitao Li, Liang Wu, Fan Yang, Yating Zhang, Wei Shi, Jianquan Yao
Summary: This paper demonstrates an all-silicon metasurface that converts arbitrary incident polarization states to circular polarization states through mutual interference. The conversion intensities can be controlled using the behavior of polarization states defined on the Poincare sphere. The metasurface exhibits broadband circular dichroism and has potential applications in various fields.
Article
Engineering, Electrical & Electronic
Muhammed Abdullah Unutmaz, Gulay Ozsahin, Tuna Abacilar, Mehmet Unlu
Summary: This article presents the investigation and design of high-performance transitions from coplanar waveguide to single-conductor, corrugated waveguides for terahertz spoof surface plasmon polariton waveguides. A novel methodology is proposed to examine the relationship between guided wavenumber and momentum matching, allowing for the design of low-loss transition circuits. The measurement results show significant improvement in insertion losses compared to previous studies.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Optics
Xie-Qiu Yu, Yu-Shan Zeng, Li-Wei Song, De-Yin Kong, Si-Bo Hao, Jia-Yan Gui, Xiao-Jun Yang, Yi Xu, Xiao-Jun Wu, Yu-Xin Leng, Ye Tian, Ru-Xin Li
Summary: Using terahertz surface waves, electron energy gain of up to 1.1 MeV and effective acceleration gradient of up to 210 MV m(-1) can be achieved, enabling potential phase-space control and application in compact microscopy, radiation sources, and cancer therapies.
Article
Engineering, Electrical & Electronic
Giampiero Lovat, Walter Fuscaldo, Massimo Moccia, Giuseppe Castaldi, Vincenzo Galdi, Paolo Burghignoli
Summary: A rigorous full-wave modal analysis method based on the method of moments in the spectral domain is proposed for line waveguides with arbitrary anisotropic surface impedances. An integral equation is formulated with an auxiliary current sheet and the impedance boundary condition is extended to the entire plane. The method is validated with numerical results and compared with analytical and commercial simulator results.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Review
Optics
Brett N. N. Carnio, Oussama Moutanabbir, Abdulhakem Y. Y. Elezzabi
Summary: Continued development in various fields is driving the need for terahertz-wave technologies to be applied in practical situations. The compatibility of waveguides with on-chip fabrication techniques makes them an ideal choice for on-chip terahertz radiation generation. This review examines different types of waveguides and their ability to produce terahertz radiation, providing valuable information for further development in this area.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Alessio Stefani, Jonathan Henry Skelton, Alessandro Tuniz
Summary: The study investigated antiresonant dielectric waveguides made of thermoplastic polyurethane, which have a hollow-core structure and high flexibility for millimeter-wave manipulation with low losses in the sub-terahertz transmission bands. The experiments compared one-tube and six-tube geometries, showing that the six-tube waveguide outperforms at smaller bend radii but may experience transmission drops at specific frequencies compared to the one-tube waveguide at larger bend radii.
Article
Nanoscience & Nanotechnology
Yan-Feng Wang, Li Yang, Ting-Ting Wang, A-Li Chen, Vincent Laude, Yue-Sheng Wang
Summary: The study demonstrates the manipulation of Lamb waves guided along reconfigurable phononic circuits by adjusting defects in a solid phononic crystal slab. The guiding frequency is found to be independent of waveguide details, which is significant for the design of reconfigurable phononic devices. Both numerical and experimental results show good agreement.
Article
Multidisciplinary Sciences
Francesco Gabriele, Mattia Udina, Lara Benfatto
Summary: The study demonstrates that THz light can induce two-plasmon excitations of both out-of-plane and in-plane phase modes, leading to markedly different resonant and thermal effects due to the strong anisotropy of the Josephson couplings.
NATURE COMMUNICATIONS
(2021)
