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
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
Lijun Yu, Benhai Wang, Haobin Han, Chaoqing Dai, Wei Liu, Yueyue Wang
Summary: In this study, Antimony selenide (Sb2Se3) nanorods were successfully prepared by the hot solvent method, demonstrating excellent photoelectric properties and nonlinear optical performance. Integration of Sb2Se3 into fiber lasers enabled Q-switching with high single pulse energy and low self-starting threshold.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Multidisciplinary
Wenyao Zhang, Hongfu Huang, Zhenkun Wang, Qi Kang, Shunxiang Liu, Shunbin Lu, Qiao Wen
Summary: In this study, a novel 2D ternary chalcogenide Ta2NiTe5 is synthesized using liquid-phase exfoliation technique and its nonlinear optical characteristics are investigated. Passive Q-switched lasers based on Ta2NiTe5-SA device are successfully demonstrated with minimum pulse widths at different wavelengths.
ADVANCED OPTICAL MATERIALS
(2023)
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
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
Nanoscience & Nanotechnology
Yingtian Xu, Hanfei Hu, Hongda Wu, Chongyang Xu, He Zhang, Liang Jin, Yonggang Zou, Xiaohui Ma, Jingzhi Yin
Summary: The study demonstrated the use of CuCrO2 nanoparticle-polyimide composite film as a saturable absorber to regulate the output characteristics of a passively Q-switched fiber laser at 1.55 micrometers. By utilizing reverse saturable and saturable absorptions, the laser showed significant performance enhancement with two stages of output. This approach resulted in pulse duration and repetition rate compression simultaneously, highlighting the importance of proper cavity loss design in optimizing Q-switched pulse laser output characteristics.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Polymer Science
Hongfu Huang, Jianwen Wang, Ning Xu, Shunxiang Liu, Guowen Liang, Qiao Wen
Summary: A transmissive saturable absorber (SA) with Ti2CTx MXene was successfully fabricated using the spin-coating method and integrated into a diode-pumped solid-state (DPSS) Nd:YAG laser for stable passively Q-switched operation. The laser achieved a shortest pulse duration of 163 ns and high slope efficiency and optical conversion efficiency at a pump power of 4.5 W. This work demonstrates the potential of Ti2CTx as a saturable absorber for solid-state laser pulse generation.
Article
Instruments & Instrumentation
Hongling Chen, Mao Zhou, Peixiong Zhang, Hao Yin, Siqi Zhu, Zhen Li, Zhenqiang Chen
Summary: In this work, few-layer bismuthene nanosheets were used to fabricate a two-dimensional saturable absorber (SA) for the first time. The synthesized bismuthene nanosheets SA showed great potential for pulse laser generation in the near-infrared region.
INFRARED PHYSICS & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Qing Wu, Yanyu Wang, Gang Zhao, Haibin Wu, Yi Hu, Mengke Wang
Summary: In this work, an all-solid-state Tm:YAP laser Q-switched by a graphdiyne (GDY) saturable absorber is demonstrated, achieving the shortest pulse duration and highest repetition frequency from GDY in a solid-state Tm laser to date. The study shows the remarkable nonlinear optical properties of GDY, indicating its promising potential in the field of optoelectronics.
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
Materials Science, Multidisciplinary
Chongyang Xu, Yingtian Xu, Yuanyuan Jing, Yang Liu, Li Li, He Zhang, Liang Jin, Linlin Shi, Yonggang Zou, Xiaohui Ma
Summary: CuCrO2 nanoparticles-polyimide films are successfully used for passively Q-switched pulse output in ytterbium-doped fiber lasers. The output characteristics of the laser can be regulated by using these films, which simultaneously compresses the pulse duration and repetition rate while increasing the single pulse energy and peak power. This is the first time that simultaneous compression of pulse duration and repetition rate has been achieved in YDFL, and the integration of CCO nanoparticles in YDFL is also a first.
Article
Materials Science, Multidisciplinary
Xiaofei Ma, Ci Wang, Jian Zhang, Tao Wang, Anye Wang, Siyuan Wang, Zhitai Jia, Baitao Zhang, Jingliang He, Sander van Smaalen, Xutang Tao
Summary: This study investigates the nonlinear optical response, optical properties, and applications of BiOCl crystals grown by chemical vapor phase transport method. The results show that BiOCl crystal exhibits wideband transparency and high laser damage threshold, making it suitable for NLO applications.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Shaohong Guo, Chunxia Li, Heng Jia, Nan Li
Summary: In this study, passively Q-switched erbium-doped fiber laser (EDFL) operation at the C-band region was achieved using perovskite CsPbBr3 nanocrystals as a saturable absorber (SA). The CsPbBr3 nanocrystals exhibited broadband linear optical absorption in the 300-2000 nm range and nonlinear optical absorption at the C-band range of around 1560 nm.
Article
Engineering, Electrical & Electronic
Jingchong Wang, Chen Guan, Yang Liu, Zhenhua Cong, Shiwu Wang, Yi Nie, Zhigang Zhao, Zhaojun Liu
Summary: In this study, a red laser diode-pumped Alexandrite laser with a semiconductor saturable absorber mirror for passive Q-switching was presented. By using customized SESAMs, a pulsed Alexandrite laser at 749.6 nm with an average power of 0.904 W, a repetition rate of 20.27 kHz, and a pulse energy of 44.59 μJ was achieved.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Optics
Tianju Zhang, Chaocheng Zhou, Jia Lin, Jun Wang
Summary: Compared to lead-based perovskites, 2D tin-based perovskites have lower photoluminescence quantum yields and enhanced emission linewidths. The difference in emission properties can be attributed to the stronger exciton-phonon scattering intensity and higher defects density in tin-based perovskites, which significantly broaden the emission linewidth and accelerate the exciton relaxation process, leading to a reduction in photoluminescence quantum yields.
CHINESE OPTICS LETTERS
(2022)
Article
Multidisciplinary Sciences
Tianju Zhang, Chaocheng Zhou, Xuezhen Feng, Ningning Dong, Hong Chen, Xianfeng Chen, Long Zhang, Jia Lin, Jun Wang
Summary: This study investigates the luminescence mechanism of Sn-based perovskites and reveals that deformation potential scattering caused by charged defects dominates the interband relaxation of excitons.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Xin Chen, Jiawei Huang, Chenduan Chen, Meiling Chen, Guohang Hu, Hongqiang Wang, Ningning Dong, Jun Wang
Summary: PdSe2 exhibits significant saturable absorption performance, with a modulation depth of 22.47% at 520 nm. A visible light thresholder based on PdSe2 is proposed to improve signal-to-noise ratio, while the intrinsic recombination mechanism is revealed through pump-probe technique and first-principles calculation.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chaocheng Zhou, Tianju Zhang, Chao Zhang, Xiaolin Liu, Jun Wang, Jia Lin, Xianfeng Chen
Summary: This study demonstrates that a small amount of indium ions can effectively repair defects, improve energy-level alignment, and reduce hot-carrier losses in perovskite solar cells, leading to higher efficiency and stability.
Article
Optics
Chenduan Chen, Ningning Dong, Jiawei Huang, Zixin Wang, Jun Wang
Summary: This work systematically investigates the third-order nonlinear optical properties and ultrafast carrier dynamics of layered indium selenide obtained by mechanical exfoliation. The results suggest that layered indium selenide exhibits two-photon absorption response and achieves saturation under visible light excitation. Furthermore, it shows a fast recombination time and a high optical modulation speed in the visible region.
Article
Nanoscience & Nanotechnology
Tianju Zhang, Chaocheng Zhou, Jia Lin, Jun Wang
Summary: This study investigates the influence of defects and phonon scattering on the Auger recombination process of two-dimensional tin iodide perovskite LEDs. It reveals that defect scattering dominantly regulates the Auger recombination rate in these perovskites.
Article
Nanoscience & Nanotechnology
Mingang Zhang, Xiangdong Xu, Jinrong Liu, Yadong Jiang, Jun Wang, Ningning Dong, Chenduan Chen, Baohua Zhu, Yuning Liang, Ting Fan, Jimmy Xu
Summary: Given the substantial pi-electron delocalization observed in 4-N,N-dimethylamino-4'-N'-methyl-stilbazolium tosylate (DAST), a high third-order nonlinear optical response can be expected. In this study, all-organic DAST-polymethyl methacrylate (PMMA) composite films were prepared and their nonlinear absorption performances were measured. The results showed that the composite films exhibited giant optical limiting (OL) responses, high flexibility, and excellent environmental stability. This suggests that these all-organic composite films have great potential for applications in flexible OL devices.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Optics
Xiaobo Li, Xin Chen, Ning Wei, Chenduan Chen, Zhan Yang, Haijiao Xie, Jiajing He, Ningning Dong, Yaping Dan, Jun Wang
Summary: This study explores the wavelength-dependent and pulse-width-dependent nonlinear optical properties of liquid-phase exfoliated MoSSe nanosheets. The results show that the saturable absorption response of MoSSe nanosheets in the visible region is better than that in the near-infrared region, and the response under longer pulse excitation is better. Furthermore, a phase modulator integrated with a monolayer MoSSe into a silicon slot waveguide is designed and optimized to achieve high optical extinction. MoSSe exhibits satisfactory nonlinear optical properties and has excellent potential for applications in optoelectronic devices.
Article
Materials Science, Multidisciplinary
Zhan Yang, Weimin Tan, Tianju Zhang, Chenduan Chen, Zixin Wang, Yu Mao, Chenxi Ma, Qing Lin, Wanjun Bi, Fei Yu, Bo Yan, Jun Wang
Summary: In this study, optical nonlinear activators for ONNs are prepared by combining Ti3C2Tx MXene with microfibers, and their principles are verified. Experimental measurements show that the performance of the proposed activators in multiclassification and super-resolution reconstruction tasks is comparable to that of commonly used activation functions in computers. Four criteria are proposed and validated for evaluating the performance of the nonlinear activator.
ADVANCED OPTICAL MATERIALS
(2022)
Review
Optics
Yu Mao, Lei Wang, Chenduan Chen, Zhan Yang, Jun Wang
Summary: The determination of the number of layers of 2D materials is crucial for controlling the performance of nanoelectronic and optoelectronic devices. Various optical technologies have been proposed to determine the thickness of samples by studying the relationship between the number of layers and optical properties. The rapid growth of 2D materials and heterostructures in the past decade has exceeded the capabilities of traditional experimental and computational methods. Machine learning is emerging as a powerful tool to support these methods and explore the full potential of optical technology.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Mingang Zhang, Xiangdong Xu, Wenjie Hu, Yadong Jiang, Chenduan Chen, Ningning Dong, Jun Wang, Yuning Liang, Baohua Zhu, Han Zhang, Jimmy Xu
Summary: In this study, the third-order nonlinear optical (NLO) absorption properties and ultra-fast carrier dynamics of organic material DAST were investigated. The results showed that DAST exhibited ultra-high nonlinear saturable absorption (SA) responses and reliable long-term stability. These findings are of great significance for the development of high-performance optoelectronic devices based on organic materials in the future.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jiawei Huang, Lei Tao, Ningning Dong, Hongqiang Wang, Song Zhou, Jun Wang, Xiaoyue He, Kehui Wu
Summary: This study explores the launching and propagating properties of HPhPs in α-MoO3 along orthogonal crystal orientations using a holey silicon nitride microcavity, providing abundant possibilities for applications and operations in nanophotonics.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Multidisciplinary Sciences
Xin Chen, Ivan M. Kislyakov, Tiejun Wang, Yafeng Xie, Yan Wang, Long Zhang, Jun Wang
Summary: The authors report a pulsed laser-induced photoacoustic driving force that can overcome the van der Waals adhesion forces between 2D semimetallic nanosheets and insulating substrates. Optically controlled nanomachine engineering can satisfy the touch-free and non-invasive demands of optoelectronics, nanotechnology, and biology.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Zixin Wang, Xiaowei Ji, Ningning Dong, Chenduan Chen, Zhouyuan Yan, Xun Cao, Jun Wang
Summary: In this study, the changes in the optical properties of VO2 films induced by fs laser were investigated using a variable-temperature Z-scan. The results showed that high-repetition-frequency laser can induce phase transition in VO2, which is reversible and leads to significant changes in the optical properties of the film.
Article
Optics
Wang Zixin, Dong Ningning, Wang Lulu, Cao Xun, Wang Jun
Summary: Semiconductor-metal phase transition in metal oxides, such as vanadium dioxide (VO2), has attracted significant attention due to their scientific significance and potential applications. The phase transition in VO2 can be triggered by various excitations, and the process is reversible and leads to significant changes in optical properties. This makes VO2 widely used in optical switches, smart windows, and laser protection. With the rapid development of femtosecond laser technology, researchers are increasingly interested in studying the laser-induced phase transition of VO2. The ability to control the phase transition on ultrafast time scales using optical means could benefit its applications in memory devices and ultrafast optical switches.
ACTA PHOTONICA SINICA
(2022)