Article
Chemistry, Multidisciplinary
Zhen Yue, Jingyu Liu, Jitao Li, Jie Li, Chenglong Zheng, Guocui Wang, Mingyang Chen, Hang Xu, Qi Wang, Xiaohua Xing, Yating Zhang, Yan Zhang, Jianquan Yao
Summary: This study introduces a novel technology based on dynamic phase and spatial interleaving unit arrangement for metasurfaces, enabling multiple wavefront manipulations including spin and linear polarization transformations. By designing a bifocal metasurface, various forms of wavefront manipulations can be achieved, offering a new platform for the development of terahertz integrated photonics.
Article
Nanoscience & Nanotechnology
Jung-Hwan Song, Jorik van de Groep, Soo Jin Kim, Mark L. Brongersma
Summary: The article discusses high-Q, non-local metasurfaces with independent functions across different wavelength bands, and how this technology can be used for flat optical elements in eye tracking applications.
NATURE NANOTECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Ziyi Tang, Ling Li, Haochen Zhang, Jianing Yang, Jie Hu, Xuehua Lu, Yongqiang Hu, Song Qi, Ke Liu, Mingyang Tian, Jinjin Jin, Zuojun Zhang, He Lin, Yijia Huang
Summary: This study proposes a dual-frequency multifunctional Janus metasurface design method, which can simultaneously control the amplitude, phase, and polarization of electromagnetic waves. By breaking the symmetry, different functionalities are achieved in opposite propagation directions. Numerical simulations and experimental validations demonstrate the application of this metasurface in beam deflection and lens design.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Ziying Zhang, Xueqian Zhang, Yuehong Xu, Xieyu Chen, Xi Feng, Meng Liu, Quan Xu, Ming Kang, Jiaguang Han, Weili Zhang
Summary: This study demonstrates a chiral-selective metasurface absorber using a single-layer free-standing metasurface and coherent control method, actively tuning the strength of chiral-selective behavior by changing the phase difference between two coherent inputs. It achieves near unity absorption for one circularly polarized incidence and high-efficiency cross-polarization conversion for the other circularly polarized incidence. This approach enriches functionalities and improves the performance of conventional single-layer metasurfaces, with potential applications in various practical cases.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ashfaq Ahmad, Jawad Ali, Dong-You Choi
Summary: This paper presents the design and optimization of a dual-band polarization-dependent metasurface capable of dynamically switching transmission and reflection characteristics. By changing the incident wave polarization, the metasurface is able to transform the transmission band into a complete reflection band, and vice versa. Remarkable transmission and reflection characteristics are achieved within the frequency ranges of 6.1-6.55 GHz and 8.9-9.3 GHz.
APPLIED SCIENCES-BASEL
(2023)
Article
Physics, Multidisciplinary
Zhimin Li, Zibin Lin, Longsheng Zeng, Hao Wu, Xue-Feng Zhu
Summary: This study proposes a simple strategy of manipulating underwater acoustic waves by embedding air bubbles of different sizes inside a polymer. The transmitted phase shift can cover the entire 2 pi range by adjusting the diameter of the bubbles. Utilizing a precise design of phase profiles in an air-bubble array, abnormal refraction, self-bending beams, and bottle beams are successfully demonstrated.
FRONTIERS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Yijia Huang, Tianxiao Xiao, Zhengwei Xie, Jie Zheng, Yarong Su, Weidong Chen, Ke Liu, Mingjun Tang, Jianqi Zhu, Ling Li
Summary: In this paper, a method for achieving highly efficient reconfigurable electromagnetic manipulation through the combination of subwavelength-scale metasurfaces with tunable phase-change materials is proposed. Several broadband metadevices operating in the infrared region are theoretically and numerically investigated, demonstrating beam deflection, focusing, meta-holography, and perfect absorption with angular tolerance up to 40 degrees, depending on the state of the phase-change material.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Optics
Yijia Huang, Tianxiao Xiao, Zhengwei Xie, Jie Zheng, Yarong Su, Weidong Chen, Ke Liu, Mingjun Tang, Jianqi Zhu, Ling Li
Summary: Efficient control of the phase and polarization of light is achieved using a single-layered metasurface composed of the nonvolatile phase-change material GSST. The metasurface exhibits tunable spin-orbit interactions in subwavelength scale. It enables asymmetric transmission for circularly polarized light in the amorphous state and reversed chiral transmission in the crystalline state. The metasurface also allows arbitrary wavefront manipulations based on the theory of Pancharatnam-Berry phase. This study demonstrates the potential of ultra-compact multifunctional devices for applications such as chiroptical spectroscopy, EM communication, chiral imaging, and information encryption.
Article
Optics
Jie Hu, Yujie Chen, Wenting Zhang, Ziyi Tang, Xiang Lan, Qinrong Deng, Hengyu Cui, Ling Li, Yijia Huang
Summary: This article proposes a simple yet powerful design methodology for single-layered reconfigurable metasurfaces composed of nonvolatile phase-change material Ge2Sb2Se4Te1 (GSST). The proposed metasurfaces have independent phase control and introduce another polarization degree of freedom, enabling multi-focus metalens, multistate vortex beam generator, and multi-channel meta-hologram. These multifunctional metasurfaces with tunability and compactness show great potential in various applications including information encryption, chiroptical spectroscopy, chiral imaging, and wireless communication.
Article
Engineering, Mechanical
Guangyuan Su, Zongliang Du, Peng Jiang, Yongquan Liu
Summary: This paper proposes a method to design high-efficiency elastic metasurfaces beyond the efficiency limit of the generalized Snell's law, for the refraction manipulation of flexural waves in thin plates. The authors use a genetic algorithm-based inverse method to design metasurfaces with almost perfect efficiencies by engineering the nonlocal coupling between neighboring unit cells. Additionally, by introducing bianisotropy, they demonstrate advanced high-efficiency functions such as asymmetric transmission and spatial filtering.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Optics
Mingli Wan, Pengfei Ji, Rongrong Wang, Xiaopeng Zhang, Mingli Tian, Shuqing Yuan, Liufang Zhang, Jinna He
Summary: Metasurfaces, composed of subwavelength optical phase shifters, operate in the ultraviolet range and achieve wavefront shaping functions. This research provides new insights into the development of ultraviolet metasurface-based nano-photonic devices.
OPTICS COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
Xinbo Chen, Cheng An, Jianyang Zhou, Weiwen Li
Summary: A broadband spin-decoupled metasurface is proposed to regulate dual circularly polarized waves independently. An equivalent circuit model is established to relate reflection coefficients and structural parameters, and meta-atoms are designed based on this model to form a 3-bit coding metasurface. Experimental measurements confirm the effectiveness of this methodology for metasurface design.
Article
Physics, Condensed Matter
Qian Pu, Zhengze Cheng, Cheng Ni, Ling Wu, Yongzhi Cheng
Summary: Visible light manipulation has been extensively explored due to its potential in the field of optical communication. However, the limitations posed by natural materials hinder the progress of optical devices. In this study, a new all-metal geometric metasurface (GMS) capable of high-efficient circular polarization (CP) conversion was proposed and investigated. Numerical simulations showed that the all-metal GMS achieved a cross-polarized reflection amplitude higher than 85% for normal incident CP light in a wide frequency range. Additionally, multi-functional wavefront manipulation devices, including beam deflectors, reflective planar focusing metalens, and vortex beam generators, were constructed and demonstrated using the proposed GMS.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Multidisciplinary Sciences
Feng Mei, Geyang Qu, Xinbo Sha, Jing Han, Moxin Yu, Hao Li, Qinmiao Chen, Ziheng Ji, Jincheng Ni, Cheng-Wei Qiu, Qinghai Song, Yuri Kivshar, Shumin Xiao
Summary: The authors demonstrate an efficient way to generate high-purity vortex beams by applying optical neural networks to cascaded phase-only metasurfaces. Specifically, they present record-high-quality Laguerre-Gaussian (LGp,l) optical modes with polynomial orders p = 10 and l = 200 with purity in p, l and relative conversion efficiency of 96%, 85%, and 70%, respectively.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Adam Overvig, Andrea Alu
Summary: This study demonstrates that Fano resonances can be selectively excited in the space-frequency domain, revealing a broader dichroic phenomenon with spin, spatial, and spectral selectivity. The concept is showcased using nonlocal metasurfaces deeply rooted in the symmetry features of quasi-bound states in the continuum.
ADVANCED PHOTONICS
(2021)
Article
Chemistry, Multidisciplinary
Kerui Li, Zhipeng Li, Ze Xiong, Yingxi Wang, Haitao Yang, Wenxin Xu, Lin Jing, Meng Ding, Jian Zhu, John S. Ho, Po-Yen Chen
Summary: By using MXene materials and interfacial engineering strategy, researchers have successfully fabricated cephalopod skin-inspired soft robotic skin with tunable infrared emission and thermal camouflage capabilities. This skin not only has thermal/strain sensation capabilities, but also serves as a deformable antenna for wireless communication, providing more functions for soft robots.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Chemistry, Physical
Yuxin Gao, Ze Xiong, Jizhuang Wang, Jinyao Tang, Dan Li
Summary: Untethered motile micro/nanorobots, capable of operating in hard-to-reach small spaces and performing noninvasive tasks at the cellular level, hold great promise in various fields. The use of light as an encoding method allows for precise and flexible manipulation of these robots. Hybrid systems combining light with other actuation methods offer expanded design possibilities and improved controllability.
Article
Multidisciplinary Sciences
Rongzhou Lin, Han-Joon Kim, Sippanat Achavananthadith, Ze Xiong, Jason K. W. Lee, Yong Lin Kong, John S. Ho
Summary: This study demonstrates the digital embroidery of robust liquid metal-based fibers to create electronic textiles with wireless functionalities for non-intrusive monitoring of human health during daily activities.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Xin Yang, Xi Tian, Qihang Zeng, Zhipeng Li, Dat T. Nguyen, John S. Ho
Summary: This study presents a radio frequency sensor made from conductive textile that allows for sensitive noncontact monitoring of human vital signs. The sensor uses a unique structure and operating mode to track heartbeat and respiration through measurements of the radio frequency spectrum. Experiments show that the sensor's measurements are comparable to gold standard sensors and remain robust during daily activities.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Fengyuan Yang, Dat T. Nguyen, Brian O. Raeker, Anthony Grbic, John S. Ho
Summary: This paper proposes a method to improve wireless signal transmission using cascaded metasurfaces. By using deeply subwavelength cascaded metasurfaces at the interface between air and biological tissue, the efficiency of signal transmission can be enhanced.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Chemistry, Multidisciplinary
Shuwen Chen, Shicheng Fan, Jiaming Qi, Ze Xiong, Zheng Qiao, Zixiong Wu, Joo Chuan Yeo, Chwee Teck Lim
Summary: A bilayer liquid-solid conductor (b-LSC) with amphiphilic properties is introduced in this study to interface reliably with both rigid electronics and elastomeric substrates. It exhibits high strain-insensitive conductivity, extreme stretchability, and negligible resistance change under ultra-high strain. The b-LSC can be used for various applications, such as stretchable sensor arrays, multi-layered stretchable displays, and highly integrated haptic user-interactive optoelectric E-skins.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Wanyuan Li, Changjin Wu, Ze Xiong, Chaowei Liang, Ziyi Li, Baiyao Liu, Qinyi Cao, Jizhuang Wang, Jinyao Tang, Dan Li
Summary: This study reports a self-driven magnetorobot that uses ion-exchange resin to dynamically remove and separate micro/nanoplastics from nonmarine waters. The magnetorobot demonstrates sustainable removal efficiency of over 90% and is applicable to various plastic compositions, sizes, shapes, and nonmarine water samples.
Article
Multidisciplinary Sciences
Xin Ting Zheng, Zijie Yang, Laura Sutarlie, Moogaambikai Thangaveloo, Yong Yu, Nur Asinah Binte Mohamed Salleh, Jiah Shin Chin, Ze Xiong, David Lawrence Becker, Xian Jun Loh, Benjamin C. K. Tee, Xiaodi Su
Summary: This study presents a battery-free paper-based sensor that utilizes deep learning algorithms to comprehensively assess wounds, including inflammation and infection. The sensor consists of a wax-printed paper panel with five colorimetric sensors for measuring temperature, pH, trimethylamine, uric acid, and moisture. By analyzing sensor images captured by a mobile phone using neural network-based machine learning algorithms, the healing status of wounds can be determined. The sensor can accurately classify healing versus non-healing status with up to 97% accuracy in ex situ experiments using exudates collected from rat perturbed wounds and burn wounds. In situ monitoring of wound progression and severity is demonstrated by attaching the sensor patches to rat burn wound models. This PETAL sensor enables early warning of adverse events, facilitating prompt clinical intervention for wound care management.
Article
Chemistry, Physical
Wen Cheng, Xinyu Wang, Ze Xiong, Jun Liu, Zhuangjian Liu, Yunxia Jin, Haicheng Yao, Tak-Sing Wong, John S. Ho, Benjamin C. K. Tee
Summary: The authors designed a pressure sensor that utilizes solid-liquid-liquid-gas multiphasic interfaces and a trapped air layer to modulate capacitance changes with pressure, achieving near-friction-free contact line motions and near-ideal pressure sensing performance. The sensor possesses outstanding linearity, ultralow hysteresis, and very high sensitivity, making it suitable for operation in complex fluid environments.
Article
Multidisciplinary Sciences
Xi Tian, Qihang Zeng, Selman A. Kurt, Renee R. Li, Dat T. Nguyen, Ze Xiong, Zhipeng Li, Xin Yang, Xiao Xiao, Changsheng Wu, Benjamin C. K. Tee, Denys Nikolayev, Christopher J. Charles, John S. Ho
Summary: The authors used metamaterial textiles to achieve direct wireless networking between implanted bioelectronic devices at the scale of the human body, enabling distributed networks that can sense health conditions and deliver therapy throughout the body. This work establishes a wireless technology for precise and adaptive bioelectronic therapies using body-integrated devices.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Zhipeng Li, Chenhui Li, Guoqiang Xu, Weijin Chen, Ze Xiong, Hui Jing, John S. Ho, Cheng-Wei Qiu
Summary: Loss and noise, which are usually undesirable in electronics and optics, can have a positive role in non-Hermitian systems. In this study, we successfully reverse the detrimental effects of loss and noise and reveal their coordinated positive role in nonlinear non-Hermitian resonators. Our findings provide a general recipe to overcome loss and noise in electronics and photonics with applications from sensing to communication.
Article
Chemistry, Multidisciplinary
Wanyuan Li, Jizhuang Wang, Ze Xiong, Dan Li
Summary: Micro/nanoplastics (MNPs) pose irreversible threats to ecosystems and human health, but their removal and separation from water are challenging due to their small size and low concentration. However, the emergence of micro/nanorobots (MNRs) provides a promising solution. MNRs exhibit self-propelled mobility and design flexibility, offering a practical, cost-effective, and scalable approach for tackling MNPs pollution, as well as a useful tool for sampling and analysis in aquatic environments.
CELL REPORTS PHYSICAL SCIENCE
(2023)
Review
Biophysics
Han-Joon Kim, Weni Sritandi, Ze Xiong, John S. Ho
Summary: Light has become increasingly important in medicine, especially in wearable, ingestible, and implantable devices. This review discusses the recent advances in light-based bioelectronic devices, focusing on key technologies such as light sources, detectors, energy storage and harvesting, and wireless power and communications.
BIOPHYSICS REVIEWS
(2023)
Proceedings Paper
Biophysics
Dat T. Nguyen, Qihang Zeng, Xi Tian, John S. Ho
Summary: Vital sign monitoring is crucial for assessing an individual's health, and non-contact sensing methods using wireless technology offer a comfortable and convenient alternative. This study presents an integrated system based on microwave metamaterials and software-defined Doppler radar for non-contact vital sign monitoring through clothing. Experimental results demonstrate the system's accuracy in respiration and cardiac sensing, compared to electrocardiography as the gold standard.
2022 IEEE MTT-S INTERNATIONAL MICROWAVE BIOMEDICAL CONFERENCE (IMBIOC)
(2022)
Review
Automation & Control Systems
Jizhuang Wang, Ze Xiong, Jinyao Tang
Summary: Light-driven micro/nanorobots show excellent controllability and appealing applications, with the development of light-manipulation strategies advancing their capability for complex tasks. This review categorizes existing manipulation strategies for LMNRs based on encoding methods of light signals, while also providing an overview of swarming systems and discussing emerging applications and major challenges.
ADVANCED INTELLIGENT SYSTEMS
(2021)
