- by Manlin Yu, Kunpeng Xiao, Hui Zhang, Haoyi Deng and Huahao HuangBorophere has generated significant research interest due to its distinct in-plane anisotropy, tunable optical properties, and active surface with features required to immobilize biomolecules, which are essential in advanced biosensing applications. In this work, an ultrasensitive and highly anisotropic plasmonic sensor is proposed by vertically stacking Ag–Ni bimetal/borophene hybrid multilayers in a conventional Kretschmann configuration. Due to the advantages of the bimetal/borophene hybrid architectures, the proposed plasmonic sensor outperforms the previously reported ones in terms of angular interrogation sensitivity and […]
- by Betül Ceviz Şakar, Fatma Yıldırım, Erdem Şakar and Şakir AydoğanDue to the metallic nature of VSe2, which causes the high reverse current, studies on photodetector applications are very limited. In this study, a VSe2 film with a thickness of 71.49 nm was coated on n-type Si by the sputtering method to obtain a VSe2@n-Si junction device. Thus, we demonstrate a high-performance broadband Schottky-type photodetector (STPD) based on VSe2@n-Si with a high rectification ratio. XRD, field-emission scanning electron microscopy and energy-dispersive x-ray analysis of the VSe2 film were carried out. […]
- by Leyao Wu, Peiqin Hong, Miao Zhang, Peng Hu, Haibo Fan, Haiping Yu and Feng TengPhotoconductive detectors based on silicon wafers exhibit great potential in actual applications due to their simple structure and mature preparation process. In actual use, a surface protective coating and covering layer will always form on the surface of the device, which can affect the photodetection performance. In this paper, single CuO and Fe2O3 layers were first prepared on the surface of a photoconductive detector based on a silicon wafer. The results demonstrate that the CuO and Fe2O3 layers both improve […]
- by Yin LianhuaIn this paper, the plasma-enhanced chemical vapor deposition (PECVD) technique was used to prepare the barrier silicon oxide (SiOx) films. The influence of applying a pulsed negative bias voltage on the deposition substrate on the film deposition and barrier properties was investigated. The plasma discharge characteristics were diagnosed by optical emission spectroscopy. The structure and morphology of the films were characterized by Fourier transform infrared absorption spectroscopy and atomic force microscopy. The barrier properties were characterized by testing the oxygen […]
- by Lixia Xi, Zhiming Li, Shiwen Qi, Jiaxing Hou, Dongdong Gu, Keyu Shi, Kai Tang, Parthiban Ramasamy and Jürgen EckertThe ejection of high-flux metal vapor and its entrained flow are primary factors causing the formation of spatter and denudation phenomena in the laser additive manufacturing process. This work develops a multiphase flow model by bi-directionally coupling computational fluid dynamics–discrete element methods to reveal the influence mechanism of metal vapor from different Al alloys on the stability of the powder bed in the laser powder bed fusion (LPBF) process. The simulation results indicate that the metal vapor generated from the […]
- by Yang Zhang, Seita Katayama, Yinli Wang, Wataru Matsunaga, Masaya Kono, Takahiro Shimada and Hiroyuki HirakataControlling the piezoelectric response of layered two-dimensional (2D) materials is essential for advancing nanoelectromechanical systems and piezoelectric devices. However, the impact of interlayer shear strain on piezoelectric properties remains unclear. In this study, we investigate the enhancement of the out-of-plane (OOP) piezoelectric response in 2D ferroelectric α-In2Se3 through nanoindentation-induced shear deformation. We employ piezoresponse force microscopy to evaluate the piezoelectric properties of deformed regions while maintaining the shear-induced state. Our findings reveal that shear deformation leads to a threefold increase […]
- by Yuetian Wang, Yuanpeng Liu, Yiwen Zhang, Wenpu Geng, Wenqian Zhao, Zhongqi Pan and Yang YueTo meet the ever-increasing demand for data rate and bandwidth, mode-division-multiplexing technology utilizing orbital angular momentum (OAM) emerges as a promising solution to substantially expand the transmission capacity of optical fiber communication systems. In this work, we propose and numerically investigate a refractive index profile for multi-core fiber, termed the seven-core trench-assisted-graded-index ring fiber. This designed fiber introduces a graded-index profile to enhance OAM mode purity and increase the number of supported modes within a multi-ring core structure. A trench-assisted […]
- by Tiance Liang, Haochen Ma, Liqiu Wei, Jian Zhang, He Zheng, Chao Sun, Tianyuan Ji and Liwei ZhouThe liquid material micro-cathode arc thruster (LM-μCAT) is a type of micro-cathode arc thruster (μCAT) with liquid cathode at room temperature. It can feed a number of cathode materials theoretically in a single space mission. The performance differences of LM-μCAT with different cathode materials are compared in this study. The material is a mixture of gallium (Ga) with either aluminum particles (Ga–Al cathode) or titanium particles (Ga–Ti cathode). Results show that the particle size has no effect on the LM-μCAT. […]
- by Vidur Raj, Adan Azem, Max Patterson, Devendra Kumar Namburi, Jeff F Young and Robert H HadfieldIntegrated photonics is expected to play a key role in the scalability of quantum systems for applications such as quantum computing, quantum communications, quantum internet, and quantum metrology. One of the primary components of quantum integrated photonics is a single photon detector, which reads out the quantum information encoded in photons. Amongst available single-photon detection schemes, superconducting nanowire single photon detectors (SNSPDs) remain the most promising technology for effective on-chip coupling, because they can be seamlessly integrated with a wide […]
- by Haozhe Wang, Yu Zhang, Jie Cui, Zhixin Qian, Xiaojiang Huang, Yu Xu and Jing ZhangThe impact of radio frequency (RF) power on columnar and filamentary modes of very low frequency (VLF) plasma within pores is investigated in this work. The 12.5 kHz VLF discharge under various RF powers (13.56 MHz) was analyzed using optical photography and current-voltage measurements. Two-dimensional electron densities were derived using optical emission spectroscopy combined with collisional radiation modeling methods. It is found that RF power and VLF voltage (VVLF) significantly influence the plasma and its discharge modes within the 200 […]
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