Article
Optics
Xinxin Jin, Wenli Bao, Han Zhang, Zheng Zheng, Meng Zhang
Summary: In this study, four-wave mixing (FWM) in graphdiyne (GDY) microfiber is demonstrated using synchronized dual-wavelength pump pulses obtained from a mode-locked fiber laser. The large nonlinear refractive index of GDY and the synchronized pump pulses contribute to a high conversion efficiency, which has potential applications in measuring the nonlinear coefficient gamma of nanomaterials-based devices.
PHOTONICS RESEARCH
(2022)
Article
Optics
Hong Hong, Qiudi Chen, Yuhao Wang, Peixiong Zhang, Zhen Li, Zhenqiang Chen
Summary: This study successfully prepared a two-dimensional In2O3 molecular crystal for the first time and utilized it as a saturable absorber to achieve passive Q-switching on an Nd/Gd:YAlO3 solid-state laser. The research indicates the potential applications of In2O3-SA in the spectral region around 1 micrometer and may accelerate the development of two-dimensional materials in the field of ultra-fast photonics.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Lina Zhao, Ye Yuan, Luyang Tong, Wenyu Zhang, Zhongshuai Zhang, Tingyin Ning, Yangjian Cai, Yuanmei Gao
Summary: A stable, passively Q-switched Yb:CaGdAlO4 laser based on Mo:BiVO4 saturable absorber was demonstrated in this research. The experimental results showed that Mo:BiVO4-SA is a great candidate for passively Q-switched lasers in the near infrared region. The structure and morphology of the nanoparticles were closely observed using transmission electron microscope, Raman spectrum and linear absorption.
Article
Physics, Applied
Shang Gao, Wei Wang
Summary: In this study, few-layered MoSe2 nanosheets were fabricated using the ultrasonic-assisted liquid phase exfoliation method, with typical characterizations confirming their nonlinear absorption properties. A passively Q-switched Nd:YVO4 laser emitting 1 micron wavelength was successfully demonstrated with the MoSe2 saturable absorber, generating stable pulses with a maximum output power of 215 mW and a shortest pulse width of 192 ns. The experimental data provides a solid foundation for the photonics applications of MoSe2 nanomaterials.
MODERN PHYSICS LETTERS B
(2021)
Article
Optics
A. M. M. Nasir, A. A. Latiff, S. A. Anuar, A. R. Muhammad, M. F. A. Rahman
Summary: This study investigates the use of Molybdenum Titanium Aluminum Carbide (Mo2Ti2AlC2) as a reliable saturable absorber (SA) for stable pulse generation at a wavelength of 1563 nm. A Mo2Ti2AlC2-PVA film was created by dispersing Mo2Ti2AlC2 powder with > 200 nm particle size into polyvinyl alcohol (PVA) and drying it to form a film. The Mo2Ti2AlC2-PVA film exhibited a linear absorption coefficient of approximately 1.5 dB at the Q-switched working wavelength. Self-started Q-switching was achieved with pump power ranging from 20 mW to 55 mW, resulting in a pulse width reduction from 21.7 μs to 8.9 μs and an increase in repetition rate from 20.45 kHz to 40.40 kHz. The pulsed laser showed good stability, with a signal-to-noise ratio (SNR) of 61 dB. The highest output power and pulse energies were measured at 1.1 mW and 27.2 nJ, respectively. These findings highlight the potential of Mo2Ti2AlC2 as an alternative passive SA for laser pulsing at the 1.55-micron wavelength.
Article
Engineering, Electrical & Electronic
Shurong Jiang, Chen Wei, Le Zheng, H. Zhou, W. Liu, J. Zhang, H. Zhang, Yong Liu
Summary: We report a transition metal dichalcogenides-PtSe2 Q-switched single-mode fiber laser operating at 2783.2 nm with a nearly watt-level average output power. By incorporating a PtSe2 coated mirror as a saturable absorber, stable Q-switched laser pulses were obtained with high average power and pulse energy. The operating wavelength range of the PtSe2-coated mirror was also investigated using a plane ruled grating.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Optics
Jian Zhou, Zikai Chen, Junqing Zhao
Summary: This article presents the use of a microfiber knot resonator in a mode-locked fiber laser to achieve the formation of artificially defined and structure-stabilized optical soliton molecules (SMs).
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Article
Optics
Jinhe Yuan, Jiarui Li, Zhengyang Wu, Shuangcheng Li, Jie Han, Linjun Li
Summary: In this paper, MXene V2CTx was used as a saturable absorber for a passively Q-switched laser, achieving nanosecond pulses with high peak power and high repetition rate. The V2CTx-SA was prepared by spin-coating method and its linear and nonlinear absorption characteristics were studied. The results demonstrate the great practicability of V2CTx in laser applications.
CHINESE OPTICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yunjia Wang, Jianwen Wang, Qiao Wen
Summary: The study successfully constructed a MXene-GO nano-heterojunction for passive Q-switching in Nd:YAG solid-state lasers, generating stable ultrashort pulses with high peak power.
Article
Optics
Tengfei Dai, Jianhua Chang, Zhiliang Deng, Hongxu Li, Xiang Liu, Haibin Ni, Jun Sun
Summary: This study demonstrates for the first time the electrically switched operational regimes of an Nd:YVO4 all-solid-state mode-locked laser with a high modulation ratio. The laser automatically switches multiple operation regimes with the assistance of electrical signals, including Q-switching, Q-switched mode-locking, and continuous-wave mode-locking. The device operates at an ultralow electrical modulation power and achieves high average output power, providing a foundation for exploring their applications in electro-optical devices.
Review
Instruments & Instrumentation
Yue Qi, Zhenxu Bai, Yulei Wang, Xuanpu Zhang, Yaoyao Qi, Jie Ding, Zhenao Bai, Zhiwei Lu
Summary: Lasers with 1.5 μm emission wavelengths are suitable for eye-safe applications and transparency in the atmosphere. They are extensively used in remote sensing, ranging, and imaging, with stronger penetration in bad weather conditions compared to traditional 1 μm and visible bands. Er:Yb: glass is commonly used to generate 1.5 μm lasers, particularly for passively Q-switched pulses.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Genglin Li, Wenhui Du, Shuo Sun, Qingming Lu, Zhixiang Chen, Hongliang Liu, Yandong Ma, Xiaoli Sun, Yuechen Jia, Feng Chen
Summary: In this work, three different kinds of 2D TMDC nanosheets were prepared by liquid phase exfoliation technique, and their high-quality material properties were confirmed by Raman spectroscopy and X-ray diffraction analysis. The bandgap information of MSe2 was investigated via density functional theory, showing its potential for broadband photonic applications. By utilizing MSe2 as saturable absorbers, high-performance Q-switched mode-locked laser operation was achieved.
Article
Materials Science, Multidisciplinary
Yanxia Liu, Gang Zhang, Fengtian Gao, Zhiyong Jiao, Dailin Li
Summary: Stable output of Q-switched mode-locked laser at 1.06 μm was achieved using MoS2/MoSe2 hetero-structure saturable absorber. The heterojunction demonstrated competitive saturable absorption characteristics for all-solid-state lasers, producing higher envelope repetition rate and shorter envelope duration compared to previous results with two-dimensional materials.
Article
Physics, Applied
Mingyang Jin, Kaili Chang, Chunqiu Li, Ruifeng Zhang, Zenghui Li, Xi Wang, Ke Chen
Summary: This study demonstrates the direct growth of high-quality graphene saturable absorber mirror (GSAM) on a calcium fluoride substrate using low-temperature plasma-enhanced chemical vapor deposition. The GSAM exhibits excellent nonlinear optical absorption performance, making it a promising candidate for pulsed mid-infrared laser applications.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Mathematics, Interdisciplinary Applications
Jaspreet Kaur Nagi, Soumendu Jana
Summary: In this study, we theoretically generate broadband cavity solitons by replacing the conventional semiconductor saturable absorber with a graphene saturable absorber in a microcavity, significantly lowering the required feedback strength and threshold pump power. The high nonlinearity and easy integration of graphene make it a step towards an on-chip cavity soliton generator.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Chemistry, Physical
Bo Zhao, Xin Zheng, Yuhao Lei, Hongbo Xie, Tingting Zou, Gan Yuan, Wei Xin, Jianjun Yang
Summary: Femtosecond laser-induced periodic surface structures, achieved through double temporally delayed blue femtosecond lasers, offer a new prospect for high precision manufacture. The homogeneous large-area nanolithography on molybdenum surface shows improved structure uniformity and quality, making it suitable for applications in nanooptics.
APPLIED SURFACE SCIENCE
(2022)
Article
Physics, Applied
De-Kang Li, Su-Yun Wang, Xiao-Qing Yan, Bao-Wang Su, Zhen Hu, Zhi-Bo Liu, Jian-Guo Tian
Summary: Using a beam displacement amplification technique, we studied the Goos-Hanchen effect in mechanically exfoliated anisotropic 2D black phosphorus and rhenium disulfide. Anisotropic Goos-Hanchen shifts were observed along different crystal orientations of the two materials, with different characteristics of anisotropy. The Goos-Hanchen shift can be used to explore the anisotropy of the refractive index of a 2D material.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Xiao-Qing Yan, Xin Zhao, Haijie Xu, Lei Zhang, Dongqi Liu, Yuchen Zhang, Changfu Huo, Fang Liu, Junfang Xie, Xiao Dong, Zhi-Bo Liu, Jian-Guo Tian
Summary: CIPS is a ferroelectric material with a low phase transition temperature, allowing for convenient modulation of its optical properties through temperature control. As temperature increases, PL emission intensity and excitation efficiency decrease significantly, while two-photon absorption coefficient increases, with carrier relaxation times remaining unchanged.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Nanoscience & Nanotechnology
Hao-Wei Guo, Yang-Jun Cui, Yu-Zhe Zhang, Yun-Long Wang, Bao-Wang Su, Wen-Yuan Zhou, Jian-Guo Tian, Cui-Feng Ying, Zhi-Bo Liu
Summary: Researchers have successfully fabricated highly stable nanopores in mechanically exfoliated 2D materials. Through manual control of defect density and laser irradiation, the breakdown process is more controllable. These nanopores maintain stability and consistent conductivity during a long-term immersion experiment, and also exhibit strong rectification performance and potential for single-molecule detection.
ACS APPLIED NANO MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Fei Xing, Guangmin Ji, Zongwen Li, Weiheng Zhong, Feiyue Wang, Zhibo Liu, Wei Xin, Jianguo Tian
Summary: Two-dimensional superlattices (2DSs), which are a combination concept of a 2D material and a superlattice, have been receiving increasing attention recently. The natural advantages of 2D materials in terms of properties, dimension, diversity, and compatibility, along with improved technologies for preparation and device fabrication, provide a solid foundation for the development of 2DSs. Compared with existing 2D materials and heterostructures, 2DSs offer more materials and elaborate architectures, leading to novel systems with greater degrees of freedom for modulating material properties at the nanoscale. This review summarizes three typical types of 2DSs, including component, strain-induced, and moire superlattices, discussing their preparation methods, properties, state-of-the-art applications, and future developments.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Yangjun Cui, Haowei Guo, Xiaoqing Yan, Wenyuan Zhou, Qing Ye, Cuifeng Ying, Zhibo Liu, Jianguo Tian
Summary: Two-dimensional material nanochannels with molecular-scale confinement can be constructed by Van der Waals assembly and show unexpected fluid transport phenomena. The crystal structure of the channel surface plays a key role in controlling fluid transportation, and many strange properties are explored in these confined channels. By using black phosphorus as the channel surface, ion transport along a specific crystal orientation can be enabled, resulting in significant nonlinear and anisotropic ion transport phenomenon in the black phosphorus nanochannels. Theoretical results reveal an anisotropy of ion transport energy barrier on the black phosphorus surface, which affects the electrophoretic and electroosmotic transport of ions in the channel. This anisotropic transport may provide new approaches to controlling the transport of fluids.
Article
Chemistry, Multidisciplinary
Su-Yun Wang, De-Kang Li, Ming-Jie Zha, Xiao-Qing Yan, Zhibo Liu, Jianguo Tian
Summary: Twisted van der Waals structures exhibit tunable chiral properties in twisted anisotropic two-dimensional materials, such as black phosphorus, ReS2, PdSe2, and α-MoO3. The chirality can be tailored through engineering the symmetry, band structure, and anisotropy of these materials. The highest thickness-normalized ellipticity value and ellipticity value among 2D material systems have been achieved. The results also show that the chiroptical response exists in a wide spectral range and enable spin-selective control of information transformation.
Review
Chemistry, Multidisciplinary
Wei Xin, Weiheng Zhong, Yujie Shi, Yimeng Shi, Jiawei Jing, Tengfei Xu, Jiaxiang Guo, Weizhen Liu, Yuanzheng Li, Zhongzhu Liang, Xing Xin, Jinluo Cheng, Weida Hu, Haiyang Xu, Yichun Liu
Summary: This review comprehensively examines the latest progress in the use of low-dimensional materials (LDMs) as polarization-sensitive components in polarized photodetection and imaging. From the perspective of constitutive relations, polarized photodetectors based on LDMs can be categorized into three creative categories. The state-of-the-art works are reorganized, summarized, and analyzed, and perspectives on future opportunities and challenges are discussed.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Guo-Xin Zhang, Zhi-Cheng Zhang, Xu-Dong Chen, Lixing Kang, Yuan Li, Fu-Dong Wang, Lei Shi, Ke Shi, Zhi-Bo Liu, Jian-Guo Tian, Tong-Bu Lu, Jin Zhang
Summary: This research develops retinomorphic vision sensors with nonvolatile tunable responsivity using an ion-induced localized-field strategy, and constructs a complete neuromorphic visual system with front-end in-sensor computing and back-end in-memory computing.
Article
Nanoscience & Nanotechnology
Baowang Su, Xilin Zhang, Ronghui Luo, Xudong Chen, Jianguo Tian, Zhibo Liu
Summary: In this study, high-performance anti-ambipolar transistors based on 2D van der Waals heterostructures of black phosphorus and molybdenum disulfide are demonstrated. These transistors show apparent gate-tunable photoresponses in the visible and infrared wavelength range and exhibit strong photoresponses in the driving voltage range. The type II band alignment and photogating effect in the heterostructure enable high-performance photodetection with high detectivity and responsivity.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Xiaoguang Gao, Lingyu Li, Rong Deng, Wenjuan Zhao, Xiaoliang Zhang, Zhibo Liu
Summary: In this study, a graphene-based optical sensor was developed by uniformly dispersing gold nanorods on the graphene surface. The sensor showed high sensitivity and a simple preparation process, which is of great significance for the quantitative detection of disease markers at ultralow concentrations.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Zhe Wu, Zhongzhu Liang, Xiaoyan Shi, Fuming Yang, Rui Dai, Enzhu Hou, Wenwen Sun, Zheng Qin, Wei Xin, Haiyang Xu
Summary: A broadband, wide-angle, and highly concentrated metamaterial absorber operating in the near-infrared and mid-infrared bands is proposed. It has an absorptivity exceeding 90% in the wavelength range of 2.0-5.4 μm, with an average absorptivity of 93.5%. The absorber can concentrate the incident light energy on a small area, forming a hotspot, while still maintaining an average absorptivity of over 85% even at an incident light angle of 60 degrees. These characteristics provide a solution to improve the performance of hot electron devices, energy collection, and imaging devices.
ADVANCED PHOTONICS RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Zheng Qin, Zhongzhu Liang, Xiaoyan Shi, Dejia Meng, Rui Dai, Chunfang Sun, Wei Xin, Fuming Yang, Yingzheng Ren, Jiajing Feng
Summary: This study proposes and numerically demonstrates a long-wave infrared broadband polarization-selective metamaterial absorber (MA) with an ultrahigh extinction ratio. The MA is composed of a metal-dielectric-metal sandwich structure, and the cut-wire resonator on the top layer and the wire pair on the bottom layer provide excellent polarization selectivity. In the wavelength range of 8.28-14.15 μm, the absorption of the Transverse Magnetic (TM) wave is greater than 90%, while the absorption of the Transverse Electric (TE) wave is less than 0.15%, and the average extinction ratio reaches 724, which remains high even when integrated into a silicon substrate reaching 119. This work promises to bring new solutions to infrared polarization imaging.
ADVANCED PHOTONICS RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Xing Xin, Yanmei Zhang, Jiamei Chen, Mao-Lin Chen, Wei Xin, Mengfan Ding, Youzhe Bao, Weizhen Liu, Haiyang Xu, Yichun Liu
Summary: An alternative-growth-etching (AGE) CVD method was used to fabricate defect-suppressed submillimeter-scale monolayer WS2 single crystals. The method can enlarge the grain size of WS2 by 4-5 times and achieve a high growth rate. It can also efficiently suppress atomic vacancies in WS2. WS2 monolayers obtained by AGE-CVD possess higher crystal quality, carrier mobility, and PL quantum yield compared to those obtained by normal CVD. The method is also suitable for the synthesis of other high-quality TMD single crystals on a large scale.
MATERIALS HORIZONS
(2022)
Article
Materials Science, Multidisciplinary
Ze Zheng, Ying Song, Yu Wei Shan, Wei Xin, Jin Luo Cheng
Summary: We theoretically investigate optical injection processes, including one- and two-photon carrier injection and two-color coherent current injection, in twisted bilayer graphene. By calculating the injection coefficient spectra, we find the significance of interlayer coupling in the injection processes and understand the transitions between different bands.
