Article
Multidisciplinary Sciences
Rivka Gherabli, Roy Zektzer, Meir Grajower, Joseph Shappir, Christian Frydendahl, Uriel Levy
Summary: The development of alternative computing architectures, such as optical or electro-optical computing, is driven by the impending collapse of Moore-like growth of computational power. However, many current demonstrations are not compatible with the dominant CMOS technology used in large-scale manufacturing. Inspired by the Esaki diode, this study presents a CMOS-compatible electro-optical memory device based on a new type of NDR diode. This diode, with a unique layout, can be implemented into a photonic micro-ring resonator to enable a bistable device with optical readout in the telecom regime, providing a stepping stone for nonlinear electro-optic and neuromorphic computing structures.
Article
Energy & Fuels
Jicheng Liu, Yuanbo Zhang, Zijian Su, Dingyao Huang, Ding Xu, Manman Lu, Shuo Liu, Tao Jiang
Summary: This study proposed a novel, low-cost composite phase-change material and demonstrated its potential in high-temperature heat storage through various experimental methods. The results indicate that the material has high stability and good thermal conductivity, showing promising performance in practical applications.
Article
Chemistry, Physical
Xuesong Li, Pan Zeng, Feilong Wang, Dai Zhang, Yi Zhou, Rongqing Liang, Qiongrong Ou, Xiang Wu, Shuyu Zhang
Summary: The research demonstrates an artificial engram device based on nanoimprinted curable resin, meeting all requirements for artificial engrams such as synaptic plasticity, long memory storage time, and asymmetric memorizing-forgetting behavior. By comparing with biological counterparts, the concept of memory formation, manipulation, and implantation using the artificial engram device is illustrated.
NANOSCALE HORIZONS
(2021)
Article
Chemistry, Multidisciplinary
Tianyi Guo, Arindam Dasgupta, Sayan Chandra, Swastik Ballav, Pablo Cencillo-Abad, Souptik Mukherjee, Aritra Biswas, Muhammad Waqas Shabbir, Debashis Chanda
Summary: This study presents a frequency modulation-based uncooled long wave infrared (LWIR) detector, which achieves outstanding noise equivalent power, response time, and detectivity at room temperature. The detector utilizes a cavity-coupled phase change material, offering a new approach for highly sensitive, low-cost, and easily integrated uncooled LWIR detection.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Optics
Shaobin Zhuo, Yan Li, Annan Zhao, Yu-Ru Li, Shunyu Yao, Mingjie Zhang, Tianhua Feng, Zhaohui Li
Summary: Dynamic metasurfaces offer opportunities for compact and high-resolution spatial light modulation. Existing designs suffer from efficiency issues due to coupling between amplitude and phase modulation. A new design employing Huygens metasurface and phase-change material enables wideband phase modulation with high transmittance and provides a potential solution for efficiency and bandwidth problems in spatial light modulation.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Boshu Sun, Maoliang Wei, Kunhao Lei, Zequn Chen, Chunlei Sun, Junying Li, Lan Li, Hongtao Lin
Summary: This article discusses the design and experimental demonstration of a reconfigurable hybrid Bragg grating filter that exhibits compact, low-loss, and broadband engineering operations, making it a potential candidate for large-scale reconfigurable photonic systems.
Article
Chemistry, Physical
D. Gowthami, R. K. Sharma, Mohammad Khalid
Summary: In this study, eutectic phase change materials (EUPCM) were incorporated into MXene nanopowder to strengthen thermal properties. The existence of adequate pores in MXene structure and the physical nature of the interaction between EUPCM and MXene were validated. The addition of MXene resulted in a consistent decrease in heating and cooling time of EUPCM. Additionally, the nanocomposites exhibited durability in thermal cycling tests.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Optics
D. A. P. U. Pi, J. U. A. N. Liu, J. I. E. Wang, Y. U. T. O. N. G. Sun, Y. A. N. Yang, W. E. I. R. U. I. Zhao, Y. O. N. G. T. I. A. N. Wang
Summary: This Letter introduces a computer-generated hologram optimization method based on complex amplitude modulation (CAM) to enhance depth cues. By optimizing the random phase and bandwidth limitation, holographic three-dimensional (3D) display with enhanced depth cues is achieved.
Article
Chemistry, Multidisciplinary
Ming Zhang, Peng Dong, Yu Wang, Baozhu Wang, Lin Yang, Ruihong Wu, Weimin Hou, Junyao Zhang
Summary: In this paper, a design for THz tunable wavefront manipulation achieved by the combination of plasmonic metasurface and phase change materials (PCMs) is proposed. The design allows for tunable reflective anomalous beam deflector and focusing metalens by utilizing the phase difference between the amorphous and crystalline states.
Article
Materials Science, Multidisciplinary
Danian Wang, Lin Zhao, Siyu Yu, Xueyang Shen, Jiang-Jing Wang, Chaoquan Hu, Wen Zhou, Wei Zhang
Summary: The integration of chalcogenide phase-change materials (PCMs) with optical devices has led to extensive research in non-volatile tunable optical devices. This review summarizes the latest progress in high-performance tunable optical PCM devices and discusses the impact of materials design and novel device structures on optical properties. It also highlights recent advances in microheater fabrication for electronic-photonic integration and outlines future opportunities in optical PCMs and non-volatile nanophotonics.
Article
Multidisciplinary Sciences
Utku Emre Ali, Gaurav Modi, Ritesh Agarwal, Harish Bhaskaran
Summary: Phase-change materials have the ability to permanently and reversibly switch between amorphous and crystalline states. In this study, nanowires were used as active nanoelectromechanical systems to overcome limitations in suspended thin-film configurations. By exploiting a dislocation-based route for amorphization, the researchers achieved active modulation of Young's modulus in GeTe nanowires. These nanowires enabled power-free tuning of resonance frequency and demonstrated real-time frequency tuning in a frequency-hopping spread spectrum radio prototype.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Rui Chen, Zhuoran Fang, Christopher Perez, Forrest Miller, Khushboo Kumari, Abhi Saxena, Jiajiu Zheng, Sarah J. Geiger, Kenneth E. Goodson, Arka Majumdar
Summary: A wide-bandgap PCM antimony sulfide (Sb2S3)-clad silicon photonic platform is reported, which achieves low loss, high extinction ratio, high cyclability, and 5-bit operation. The Sb2S3-based devices are programmed via on-chip silicon PIN diode heaters within sub-ms timescale, with controllable multilevel operations achieved by applying multiple identical pulses.
NATURE COMMUNICATIONS
(2023)
Article
Construction & Building Technology
Jikun Ma, Hui Liu, Dawei Sun, Jianfeng Wang, Suping Cui
Summary: Novel microencapsulated phase change materials (PU-UF MPCMs) with methyl palmitate and methyl stearate as core and double-layered shell structure were designed and their composition, microstructure and thermal performances were investigated. The results showed that PU-UF MPCMs exhibited spherical shape and double-layered shell structure, and had high thermal storage capacity. This indicates the potential of PU-UF MPCMs for enhancing energy savings and thermal comfort in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Chen Gao, Jiabin Shen, Xiaozhang Chen, Zengguang Cheng, Peng Zhou
Summary: Photonic memory offers superior speed, power consumption, and bandwidth for data storage hardware. The transmission contrast and thermal distribution of chalcogenide phase-change materials (PCMs) in photonic memory are explored based on their spatial structures, including geometric shapes, vertical positions, and array distributions. Optimization methods have been proposed to improve the transmission contrast and thermal uniformity.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Engineering, Electrical & Electronic
Zhuoran Fang, Rui Chen, Jiajiu Zheng, Arka Majumdar
Summary: The use of phase change materials in silicon photonics has been gaining attention due to their high refractive index contrast between two states, which can be reversibly switched and non-volatile. Progress has been made in developing photonic switches based on PCM for photonic integrated circuits, showing great potential for future applications in this field.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Zhe Yang, Bowen Li, Jiang-Jing Wang, Xu-Dong Wang, Meng Xu, Hao Tong, Xiaomin Cheng, Lu Lu, Chunlin Jia, Ming Xu, Xiangshui Miao, Wei Zhang, En Ma
Summary: The researchers propose a solution to the high power consumption problem in phase-change material (PCM) devices by designing and utilizing a new PCM alloy. By decomposing the alloy into a network of nanoscale crystalline domains and amorphous regions, the researchers are able to create conductive paths through nano-bridges formed in the interface region of the crystalline domains. This new PCM fabrication technology is compatible with current 3D integration technology and does not add any extra expenses or processing difficulties.
Article
Engineering, Electrical & Electronic
Xin Li, Qiang He, Hao Tong, Xiangshui Miao
Summary: The study explores the use of a bipolar programming scheme to achieve drift-reduced intermediate states in phase change memory, enabling convolutional neural network computations. The results show reduced resistance drift phenomena under bipolar programming and suggests its potential impact on CNN for inference.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Ziqi Chen, Lun Wang, Jinyu Wen, Hao Tong, Xiangshui Miao
Summary: This study investigates the dependence of the threshold voltage V$_{th}$ on the falling edge of prior pulses in a Te-based OTS device operating at high frequency. The results show that V$_{th}$ follows a Weibull distribution in the pulse sequence and the distribution drifts nonmonotonically with the pulse falling edge. The drift tendency of V$_{th}$ distribution is found to depend on the device area. Furthermore, the study reveals that the V$_{th}$ drift in continuous device operation is controllable and results from a combination of heat accumulation and the recovery process.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Materials Science, Multidisciplinary
Ruizhe Zhao, Mingze He, Lun Wang, Ziqi Chen, Xiaomin Cheng, Hao Tong, Xiangshui Miao
Summary: This study proposes a high-aspect-ratio lateral nanowire PCM device to achieve stable multi-level cell operations and improve storage density. The precise control of the amorphous region through high aspect ratio provides guidance for the design of future high-aspect-ratio three-dimensional PCM devices with multi-level cell capability.
SCIENCE CHINA-MATERIALS
(2022)
Article
Multidisciplinary Sciences
Qiang He, Zhiyuan Liu, Yitao Lu, Guoxun Ban, Hao Tong, Yi Wang, Xiangshui Miao
Summary: All-optical switches have great potential to overcome the limitations of electrical switching, but previous switches based on plasmonic metamaterials have suffered from high losses and slow switching speeds. This study demonstrates an ultrafast and low-loss all-optical switch based on an all-dielectric structure, which achieves a switching speed approximately ten thousand times faster than plasmonic switches.
Article
Materials Science, Ceramics
Yuwei Zhao, Rui Su, Lele Cheng, Min Cheng, Weiming Cheng, Hao Tong, Huajun Sun, Junbing Yan, Xiangshui Miao
Summary: Due to the instability of Fe valence and the existence of a large number of oxygen vacancies, BFO-based devices often have large leakage current and low resistance. In this paper, Pt/BiFe1-xMnxO3/TiN devices with different Mn doping concentrations were prepared and investigated. The resistive switching properties of BFMO devices improve and then degrade as the amount of Mn doping increases. The excellent electrical performance of BFMO-based devices may be attributed to the inhibition of initial oxygen vacancies caused by Mn doping.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Ziqi Chen, Lun Wang, Weiming Cheng, Hao Tong, Xiangshui Miao
Summary: In this work, we investigated the resistance characteristics of the OTS device at the ON state, finding that the ON-resistance is not constant but dependent on the real-time power applied. We proposed a thermal-induced compact model to describe the ON-resistance, which matched well with the measured ON-resistances. This research contributes to understanding the threshold switching mechanism and selecting appropriate operation conditions for the OTS selector integrated in the high-density memory array.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Optics
Qingshan Tan, Yahui Chang, Qiang He, Hao Tong, Xiangshui Miao
Summary: Reflective color switching coatings based on chalcogenide phase change material (PCM) are a highly promising display technology in the future. However, controlling stress and enhancing stretchability in flexible display coatings remains a challenge. This study presents crack-reduced reflective color coatings on a flexible substrate using a buckling structure to regulate the distribution of vacancies in PCM, effectively suppressing crack formation and improving the robustness of optical and electrical properties during stretching. This opens doors for phase change display applications in various flexible and wearable display fields.
Article
Materials Science, Multidisciplinary
Ruizhe Zhao, Hao Tong, Xiangshui Miao
Summary: Improving storage density is a challenge for phase-change memory (PCM) in storage class memory (SCM) applications. The trade-off between aspect-ratio and energy consumption in Ge2Sb2Te5 (GST) nanowires (NWs) was investigated. It was found that with increasing NWs lengths, the limit of aspect-ratio decreases and larger Reset energy is required. The optimized design range for high-aspect-ratio PCM is NWs length below 1.5 um and aspect-ratio ranging from 8:1 to 10:1. This study provides guidance for the design of high-aspect-ratio 3D PCM with better multilevel cell (MLC) operation.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Jun Lin, Xianliang Mai, Dayou Zhang, Kuan Wang, Huan Wang, Yi Li, Hao Tong, Yuhui He, Ming Xu, Xiangshui Miao
Summary: This article introduces a homogeneous device using Ge-Ga-Sb (GGS) as a phase-change-memory (PCM) material, which can mimic both neuronal and synaptic functions. By forming conductive channels and the continuous growth of crystalline areas, the device can achieve an abrupt-to-progressive transition and achieve high accuracy (90%) in standard pattern recognition.
SCIENCE CHINA-MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Yuyang Fu, Jinyu Wen, Lun Wang, Ling Yang, Qihang Zhu, Wenbin Zuo, Puyi Zhang, Yi Li, Hao Tong, Guokun Ma, Hao Wang, Xiangshui Miao
Summary: True random number generators (TRNGs) based on threshold switching memristors are essential for secure electronics. However, the previous studies had low throughputs compared to practical requirements. In this research, a high-speed TRNG using GeTex ovonic threshold switching (OTS) memristor was implemented, achieving a through-put of 2.22 Mb/s for a single cell, which is 2.2 times faster than the prior state-of-the-art. Additionally, the TRNG showed excellent endurance and passed 12 tests in the National Institute of Standards and Technology statistical test suite, demonstrating its potential for high-throughput and highly secure edge applications.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Computer Science, Information Systems
Xiaojie Wang, Zeyang Feng, Jingwei Cai, Hao Tong, Xiangshui Miao
Summary: By introducing 2D ferroelectric material In2Se3 as the gate dielectric and combining it with 2D insulating h-BN and 2D channel MoS2, an all-vdW stacking FeFET is fabricated to solve the problems caused by interfacial states, short-channel effects, and ferroelectricity degradation in ultrathin films.
SCIENCE CHINA-INFORMATION SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Lun Wang, Zixuan Liu, Zhuoran Zhang, Jiangxi Chen, Jinyu Wen, Ruizhe Zhao, Hao Tong, Xiangshui Miao
Summary: In this study, a refresh operation is proposed to solve the poor thermal stability issue of OTS selectors based on GeTe. The switching performance of GeTe selectors can be fully restored to the original level by the refresh operation and exhibit good consistency, making them applicable in the BEOL process. Furthermore, the endurance of the device is significantly improved after applying the refresh operation. The effectiveness of this refresh operation is also verified for OTS devices based on the commonly used GeSe system, suggesting its wide applicability to other OTS devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Automation & Control Systems
Yingjie Yu, Ling Yang, Houji Zhou, Ruizhe Zhao, Yi Li, Hao Tong, Xiangshui Miao
Summary: Finding similar images in real time is crucial for information retrieval and search engines. However, the increase in image data volume and dimension has led to high power consumption and computational complexity in distance computation. This paper presents a heterogeneous image retrieval system that combines parallel in-memory search with a high-precision digital system, achieving high energy efficiency and search accuracy compared to traditional methods.
ADVANCED INTELLIGENT SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Ling Yang, Ruizhe Zhao, Yi Li, Hao Tong, Yingjie Yu, Xiangshui Miao
Summary: This paper proposes an in-memory search prototype based on PCM, which achieves a highly compact and low-energy memory using PCM TCAM. The non-volatility and massive parallelism of PCM TCAM enable efficient search operations in situ, resulting in significant energy saving and improvement in throughput compared to CPU-based solutions.
IEEE ELECTRON DEVICE LETTERS
(2022)
