Editorial Material
Optics
Jiazheng Qin, Mengjia Wang, Cheng-Wei Qiu
Summary: By controlling graphene, it has become easier to access and track exceptional points.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Physics, Applied
E. Klopfer, H. Carr Delgado, S. Dagli, Mark Lawrence, Jennifer A. Dionne
Summary: In this study, we design and characterize a thermally controllable metasurface lens, which utilizes a high-quality-factor resonance to achieve lensing behavior and efficient modulation. By leveraging the thermo-optic effect, we dynamically control the spectral position of the high-Q resonance to achieve wavelength selectivity of the focusing behavior. The thermal tuning also allows for metasurface switching, changing the lensing behavior between on and off states.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Analytical
Srijan Datta, Antonello Tamburrino, Lalita Udpa
Summary: This paper presents the design, simulation, and experimental validation of a gradient-index metasurface lens for microwave imaging applications. The metasurface unit cell consists of an electric-LC resonator, and the effective refractive index is controlled by varying the capacitive gap at the center of the unit cell. A one-dimensional gradient index lens is designed and tested to explain the operational principle, and this methodology is extended to a two-dimensional lens for potential microwave imaging applications. The lenses are designed and analyzed using a full-wave finite element solver. Experimental results show that the proposed lens has good focusing performance, and a microwave nondestructive evaluation experiment is conducted to demonstrate its imaging capability.
Article
Chemistry, Physical
Yumin Gong, Fangrong Hu, Mingzhu Jiang, Longhui Zhang, Yingchang Zou, Guobao Jiang, Yongchen Liu
Summary: This study presents a THz binary encoder based on graphene metasurface, which achieves separate modulation of each passband by electrically adjusting the Fermi energy of graphene. The function of THz frequency range binary coding is realized, laying a new foundation for the development of multifunctional integrated THz devices.
Article
Nanoscience & Nanotechnology
Hyunwoo Park, Sodam Jeong, Changwon Seo, Hyeongi Park, Donghak Oh, Jae-Eon Shim, Jaeyeong Lee, Taewoo Ha, Hyeon-Don Kim, Soojeong Baek, Bumki Min, Teun-Teun Kim
Summary: In this study, the researchers demonstrate that the phase retardation of a THz wave can be electrically controlled by integrating patterned mono- and bilayer graphene onto an isotropic metasurface. By modulating the conductivity of graphene, the refractive index for one of the polarization states can be controlled, allowing for the manipulation of electromagnetic wave polarization states. This work opens up opportunities for the development of compact THz polarization devices and polarization-sensitive THz technology.
Article
Engineering, Electrical & Electronic
Zamir Wani, Mahesh P. Abegaonkar, Shiban K. Koul
Summary: This article introduces a thin metasurface planar lens for millimeter-wave MIMO applications. The lens is composed of an array of mm-wave resonators that can modify the phase profile of the electromagnetic wave propagating through it. Experimental results show that the three-port antenna with the lens achieves beam scanning and high gain.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Teng Li, Jingwen Sun, Hongfu Meng, Yizhu Shen, Sanming Hu, Wenbin Dou, Zhi Ning Chen, Thomas Zwick
Summary: This article introduces a dual-polarized double-layer metasurface lens using split dipole unit cells. It achieves a wide phase range and high transmission coefficient amplitude, performing well in experimental verification at 30 GHz.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Yeonju Kim, Ratanak Phon, Eiyong Park, Sungjoon Lim
Summary: This paper proposes a deployable broadband millimeter-wave metasurface lens antenna using a 3-D printed accordion origami structure. The metasurface lens is designed on the 3-D-printed origami with two 3-D-printed rectangular gratings and an inkjet-printed I-shaped pattern. The proposed antenna achieves broad bandwidth, high transmission efficiency, and complete 360 degrees phase coverage. Numerical and experimental results demonstrate its performance, including a 10-dB impedance bandwidth of 24.0-34.9 GHz (38%) and a 3 dB gain bandwidth of 25.0-33.5 GHz (30%). Additionally, the folded antenna has a reduced overall volume of 1/3 of its original size. The simple additive manufacturing process used also provides the advantages of lightweight and low cost.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yumin Gong, Baogang Quan, Fangrong Hu, Longhui Zhang, Mingzhu Jiang, Shangjun Lin
Summary: This study experimentally demonstrates a graphene metasurface for THz field enhancement by adjusting the conductivity of the graphene patch. The results show enhancement of the THz field and provide a foundation for exploring THz-matter interactions and nonlinear optics.
Article
Physics, Multidisciplinary
Yafeng Lu, Chen Wang, Shiqiang Zhao, Yongzheng Wen
Summary: Graphene is proposed as a platform for THz devices, and a graphene-based THz metasurface using cut-wire arrays is introduced for magnetic manipulation of THz waves. This structure allows efficient tuning of the metasurface response, making it suitable for applications such as compact THz modulators and magnetic field sensors.
FRONTIERS IN PHYSICS
(2021)
Article
Quantum Science & Technology
T-W Hsu, W. Zhu, T. Thiele, M. O. Brown, S. B. Papp, A. Agrawal, C. A. Regal
Summary: In this study, we demonstrate the use of efficient dielectric metasurface lens for trapping and imaging single neutral atoms. We compare the performance of the metasurface lens with numerical computations and predict its potential for future applications in atom trapping and quantum information experiments.
Article
Chemistry, Physical
M. Amin, O. Siddiqui, H. Abutarboush, M. Farhat, R. Ramzan
Summary: A novel method utilizing the chirality of highly sensitive graphene plasmonic metasurfaces is proposed to characterize the complex refractive indexes of viruses by detecting the polarization state of the reflected electric fields in the THz spectrum. The method exploits chiral surface currents to couple linearly polarized incident fields to circularly polarized reflected fields, resulting in unique polarization states in the far-field with ellipticity values that change rapidly with the analyte's refractive index. The method demonstrates potential for virus characterization with simpler instrumentation compared to traditional spectroscopic methods.
Article
Materials Science, Multidisciplinary
Jinxing Li, Guohui Yang, Yueyi Yuan, Qun Wu, Kuang Zhang
Summary: This paper proposes an ultra-thin metasurface-based superoscillatory lens that can generate a sub-diffraction optical needle with a long focal depth. The lens has the advantages of simple fabrication, high efficiency, and low-profile design.
FRONTIERS IN MATERIALS
(2022)
Article
Physics, Applied
Taro Ikeda, Etsumi Kojima, Shinya Sugiura, Hideo Iizuka
Summary: By tuning the resonance frequency of two coupled resonators, near 2 pi phase rotation and unity amplitude in the reflection wave can be achieved without the use of a metallic plate. We demonstrate this mechanism on a reflective graphene metasurface with a thickness less than 0.03 times the free space wavelength. In a wireless communication scenario, the actively tunable graphene metasurface can reflect or transmit an incident wave, providing a significant advantage over structures with metallic plates. The performance of the metasurface is discussed in terms of loss effects and deviation of the reflection phase.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Zhihui He, Lingqiao Li, Huqiang Ma, Lihui Pu, Hui Xu, Zao Yi, Xinliang Cao, Wei Cui
Summary: The study presents a highly sensitive sensor based on a graphene metasurface that can achieve tunable graphene plasmon-induced transparency in the terahertz band, providing high sensitivity and figure of merit for sensor performance.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Chao Han, Xingwei Han, Jiayue Han, Meiyu He, Silu Peng, Chaoyi Zhang, Xianchao Liu, Jun Gou, Jun Wang
Summary: The study introduces a light-stimulated synaptic transistor (LSST) device with an ultra-high paired pulse facilitation (PPF) index, achieved by introducing an ultra-thin carrier regulator layer hexagonal boron nitride (h-BN) into a classic graphene-based hybrid transistor frame. Analysis of the rate-limiting effect of h-BN on photogenerated carriers reveals the mechanism behind the ultra-high PPF index of LSST. A two-layer artificial neural network connected by LSST devices demonstrates a high recognition accuracy of handwritten digits.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xingchao Zhang, Xianchao Liu, Chaoyi Zhang, Silu Peng, Hongxi Zhou, Liang He, Jun Gou, Xinran Wang, Jun Wang
Summary: The researchers have successfully achieved large area and high-quality epitaxial growth of topological insulator Bi2Te3 directly on GaAs wafers, and fabricated a Gr/Bi2Te3/GaAs heterojunction array photodetector using graphene, which exhibited broadband photodetection capabilities from visible to mid-infrared and a fast response speed.
Article
Materials Science, Multidisciplinary
Hongxi Zhou, Shukai Liu, Ming Yang, Xianchao Liu, Xingchao Zhang, Xin Zhou, Jiayue Han, Jun Gou, Jun Wang, Yadong Jiang
Summary: Antimony telluride (Sb2Te3), as a third-generation topological insulator, is a potential candidate for sensitive and broadband photodetectors due to its narrow band gap and unique optical properties. However, achieving broadband detection in the mid-wave infrared region has been a significant challenge due to the fast carrier recombination time and small carrier lifetime of Sb2Te3. In this study, a distinctive broadband photodetector based on Sn-catalyzed Sb0.405Te0.595 films grown by physical vapor deposition was described. The photodetectors showed photoconductivity and sensitivity in the visible light and mid-wave infrared region, with optimized responsivity and specific detectivity of 588 A/W and 6.435 x 10(8) Jones, respectively. These devices also demonstrated excellent mechanical flexibility, durability, and stability, making them suitable for high-performance and wearable photodetectors in energy-efficient nanoelectronics.
Article
Chemistry, Multidisciplinary
Silu Peng, Haojie Li, Chaoyi Zhang, Jiayue Han, Xingchao Zhang, Hongxi Zhou, Xianchao Liu, Jun Wang
Summary: This paper investigates the effect of deposition time on the structure, morphology, and optical absorption of PbSe thin films deposited by chemical bath deposition. In addition, the authors improve the mid-infrared detection capability of PbSe through iodine treatment, resulting in superior photoelectric properties.
Article
Chemistry, Multidisciplinary
Yunkun Yang, Junchen Zhou, Xiaoyi Xie, Xingchao Zhang, Zihan Li, Shanshan Liu, Linfeng Ai, Qiang Ma, Pengliang Leng, Minhao Zhao, Jun Wang, Yi Shi, Faxian Xiu
Summary: Cd3As2-based heteroepitaxial photodetectors with high responsivity and broadband response have been demonstrated, and can be utilized for imaging in the visible to near-infrared spectrum.
Article
Chemistry, Multidisciplinary
Yunlu Lian, Jiayue Han, Ming Yang, Silu Peng, Chaoyi Zhang, Chao Han, Xingchao Zhang, Xianchao Liu, Hongxi Zhou, Yang Wang, Changyong Lan, Jun Gou, Yadong Jiang, Yulong Liao, He Yu, Jun Wang
Summary: This study proposes a novel strategy for fabricating bi-directional photoresponse devices based on PtSe2-x films. By tuning the ratio of PtSe2 in the film, the direction of the photocurrent can be reversibly modulated in a broadband range, and the polarity switching wavelength from NPC to PPC can be further modulated. The tunable bi-directional photoresponse enables the device to mimic the fundamental functions of artificial synapses.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Jiayue Han, Fakun Wang, Song Han, Wenjie Deng, Xiaoyang Du, He Yu, Jun Gou, Qi Jie Wang, Jun Wang
Summary: 2D-inorganic/organic CT photodetectors integrate 2D materials with organics to form charge transfer heterojunctions, improving the performance and functionality of photodetectors. Recent advances focus on the use of wafer-scale monocrystals and potential applications in optical biology, synapses, and machine vision.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chao Han, Xianchao Liu, Xingwei Han, Meiyu He, Jiayue Han, He Zhang, Xin Hou, Hongxi Zhou, He Yu, Zhiming Wu, Jun Gou, Jun Wang
Summary: This paper demonstrates a high-performance phototransistor based on graphene/organic heterojunction, which has superior sensitivity and response speed, and can be used for mimicking the real-time sensing and processing capabilities of human retina in high-efficient image processing, as well as real-time monitoring of human pulse signal and heart rate.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yuchao Wei, Chao Chen, Chong Tan, Le He, Zhengze Ren, Chaoyi Zhang, Silu Peng, Jiayue Han, Hongxi Zhou, Jun Wang
Summary: This study successfully synthesized a Bi2O2Se nanoribbon and achieved a fast response and low noise photodetector by applying a Schottky barrier between the Bi2O2Se and Au electrodes. The device has low dark current and fast response time, providing new opportunities for high-performance VIS-NIR photodetectors.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xingchao Zhang, Yunkun Yang, Hongxi Zhou, Xianchao Liu, Rui Pan, He Yu, Jun Gou, Zhiming Wu, Jiang Wu, Faxian Xiu, Yi Shi, Jun Wang
Summary: This study developed an ultra-low-noise-level PD linear array based on a 3D Dirac semimetal (Cd1-xZnx)(3)As-2/Sb2Se3 heterojunction. The PD exhibited outstanding photodetection capacity from the visible to mid-infrared region, with high SNR, peak specific detectivity, and response speed. It also demonstrated long-term stability and uniformity, showing great potential for advanced optoelectronic applications.
SCIENCE CHINA-MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ming Yang, Hongxi Zhou, Jun Wang
Summary: Topological insulators (TIs) are promising candidates for photoelectric devices due to their remarkable properties and compatibility with traditional processing technologies. This review summarizes the optoelectronic characteristics of TIs, design and fabrication of derivative heterostructures, and prospects future development trends and research directions.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Qi Han, Yadong Jiang, Xianchao Liu, Chaoyi Zhang, Jun Wang
Summary: van der Waals heterostructures of black phosphorous (BP) and Molybdenum Disulfide (MoS2) were designed and evaluated for photodetection applications from visible to mid-infrared wavelengths. The device exhibited a low dark current for short wavelength light, and the contributions of heat and photo energy to current enhancement were analyzed. The response speed was determined by the competition of BP and MoS2 photocurrent, and the device showed gate tunable response time and on-off ratio for versatile potential applications. For mid-infrared radiation, the BP-MoS2 heterojunction exhibited a negative response similar to intrinsic BP when MoS2 thickness was tailored. The normalized detectivity was 2.02 x 10(8) Jones for 4.5μm mid-infrared radiation. Noise reduction was conducted to achieve time-resolvable photo-response, and a low bias was necessary to reduce flicker noise to an acceptable level.
IEEE PHOTONICS JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Chaoyi Zhang, Silu Peng, Jiayue Han, Chunyu Li, Hongxi Zhou, He Yu, Jun Gou, Chao Chen, Yadong Jiang, Jun Wang
Summary: In this study, a van der Waals (vdWs) field effect transistor (FET) composed of semimetal PdTe2 and transition metal dichalcogenides (TMDs) WSe2 is fabricated, which demonstrates high sensitivity photoelectric detection performance in a wide band from visible light (405 nm) to mid-infrared (5μm). The dark current and noise level in the device are greatly suppressed by effective gate control. With an extremely low dark current (1.2 pA), the device achieves an optical on/off ratio up to 10(6), a high detectivity of 9.79 x 10(13) Jones, and a rapid response speed (219 and 45μs). This research demonstrates the latent capacity of the 2D topological semimetal/TMDs vdWs FET for broadband, high-performance, and miniaturized photodetection.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Silu Peng, Chaoyi Zhang, Jiayue Han, Chunyu Li, Hongxi Zhou, He Yu, Chao Chen, Jun Gou, Jun Wang
Summary: A PbSe0.5Te0.5/MoSe2 heterostructure is successfully fabricated to achieve a high-performance photodetector with significant rectifying effect and extremely low dark current density. The detector exhibits broadband photodetection, high switch ratios, and fast response speed, providing a promising strategy for miniaturized and efficient photodetection.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ming Yang, Xiaoqiang Zhang, Hongxi Zhou, Gui Fu, Xin Zhou, Yunlun Lian, Jinxin Hao, He Yu, Xinyu Zhu, Jun Wang
Summary: Bi2O2Se is a material with excellent photoelectric properties and finds broad applications in optoelectronics and electronics. This study developed a Bi2O2Se/MoO3 thin-film heterojunction photodetector with a wide broadband range, fast-response time, and high specific responsivity, detectivity, and on/off ratio. The device exhibited excellent long-term stability and flexibility.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
