Dajun Zhang
ShanghaiTech University
27 Papers
21 Citations
Dajun Zhang is an academic researcher from ShanghaiTech University. The author has contributed to research in topics: Bessel beam & Computer science. The author has an hindex of 6, co-authored 22 publications. Previous affiliations of Dajun Zhang include Chinese Academy of Sciences.
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Papers
High-Efficiency Ultrathin Dual-Wavelength Pancharatnam–Berry Metasurfaces with Complete Independent Phase Control
TL;DR: In this paper, a bilayer meta-atom is designed to operate at two wavelengths, the cross-polarized transmission efficiencies of which reach more than 70% at both wavelengths.
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3-D Printed Swastika-Shaped Ultrabroadband Water-Based Microwave Absorber
TL;DR: In this paper, a swastika-shaped ultrabroadband metamaterials absorber is proposed, which can achieve greater than 90% absorption in the frequency band of 9.3-49.0 GHz with a relative bandwidth of 136%.
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A Preclinical System Prototype for Focused Microwave Breast Hyperthermia Guided by Compressive Thermoacoustic Tomography
Jianian Li,Baosheng Wang,Dajun Zhang,Chenzhe Li,Yihui Zhu,Yi Zou,Baile Chen,Tao Wu,Xiong Wang +8 more
TL;DR: In this paper, the authors developed a preclinical system prototype for the focused microwave breast hyperthermia (FMBH)-CTT technique, containing a microwave phased antenna array, a microwave source, an ultrasound transducer array and associated data acquisition module.
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Full control of dual-band vortex beams using a high-efficiency single-layer bi-spectral 2-bit coding metasurface.
Mingbo Xin,Rensheng Xie,Guohua Zhai,Jianjun Gao,Dajun Zhang,Xiong Wang,Sensong An,Bowen Zheng,Hualiang Zhang,Jun Ding +9 more
TL;DR: An emerging dual-band reflection-type coding metasurface is proposed to mitigate issues by newly engineered meta-atoms, which could achieve independent 2-bit phase modulations at two frequency bands, validating the full control capability of the proposed approach.
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Frequency-Multiplexed Complex-Amplitude Meta-Devices Based on Bispectral 2-Bit Coding Meta-Atoms
Rensheng Xie,Minbo Xin,Shiguo Chen,Dajun Zhang,Xiong Wang,Guohua Zhai,Jianjun Gao,Sensong An,Bowen Zheng,Hualiang Zhang,Jun Ding +10 more
TL;DR: In this article, a reflective 2-bit meta-hologram is proposed to operate with independent complex-amplitude modulations at two frequency bands, where two C-shape split ring resonators are located in the centers of a circular hole and an annular slot.
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