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ultrafast laser state active controlling based on anisotropic quasi-1D material

Light(Science & Applications) 2024年第4期13卷 717-726页

作者： Zixin Yang Qiang Yu Jian Wu Haiqin Deng Yan Zhang Wenchao Wang Tianhao Xian Luyi Huang Junrong Zhang Shuai Yuan Jinyong Leng Li Zhan Zongfu Jiang Junyong Wang Kai Zhang Pu Zhou College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China. Nanhu laser lab.ratory National University of Defense TechnologyChangsha 410073China. i-lab.Key lab.ratory of Nanodevices and Applications&Key lab.ratory of Nanophotonic Materials and Devices Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China. School of Applied and Engineering Physics Cornell UniversityIthacaNY 14853USA. State Key lab.ratory of Advanced Optical Communication Systems and Networks School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China. Shanghai Key lab.of Modern Optical System University of Shanghai for Science and TechnologyShanghai 200093China

laser state active controlling is challenging under the influence of inherent loss and other nonlinear effects in ultrafast *** an extension of degree of freedom in optical devices based on low-dimensional materials may be a way ***,the anisotropic quasi-one-dimensional layered material Ta2PdS6 was utilized as a saturable absorber to modulate the nonlinear parameters effectively in an ultrafast system by polarization-dependent *** polarization-sensitive nonlinear optical response facilitates the Ta2PdS6-based mode-lock laser to sustain two types of laser states,i.e.,conventional soliton and noise-like *** laser state was switchable in the single fiber laser with a mechanism revealed by numerical *** coding was further demonstrated in this platform by employing the laser as a codable light *** work proposed an approach for ultrafast laser state active controlling with low-dimensional material,which offers a new avenue for constructing tunable on-fiber devices.

关键词： polarization fiber controlling

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Sub-10-fs pulse generation directly from a KLM Ti: sapphire laser

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Chinese Science Bulletin 2002年第12期47卷 1050-1052页

作者： Weizhu Lin Rui Liao Jinhui Wen Zhigang Liu Li Deng Haichao Zhang Tianshu Lai Zhongshan Univ Dept Phys State Key Lab Ultrafast Laser Spect Guangzhou 510275 Peoples R China

By reducing the effects of frequency dependent mode size and intracavity gain saturation of a KLM Ti: sapphire laser, the pulse bandwidth broadening is enhanced significantly. 8.5 fs pulses with the bandwidth of 92 nm at wavelength of 710 nm have been generated directly from this laser and measured with an extracavity group velocity dispersion compensation system.

关键词： femtosecond pulses Kerr-lens mode-locking self phase modulation.

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Optical phase conjugation properties of azobenzene-containing polyester films

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Chinese Science Bulletin 1996年第14期41卷 1177-1183页

作者：颜星中魏雄蔡志岗冯敏辉林位株梁兆熙 State Key lab. ultrafast laser S. Zhongshan University Guangzhou 510275 China Department of Physics Zhongshan University Guangzhou 510275 China Institute of Polymer Science Zhongshan University Guangzhou 510275 China

Optical phase conjugation is a technique that employs nonlinear optical effects to precisely reverse both the direction of the propagation and the overall phase of a wavefront. It may be used in a variety of spheres, such as adaptive optics, real-time holography, optical computing, photoresist technique and nonlinear optical spectrosc.py. In a

关键词： azobenzene-containing polyester degenerate four wave mixing photoisomerization optical phase conjugation.

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Customized modulation on plasma uniformity by non-uniform magnetic field in capacitively coupled plasma

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Plasma Science and Technology 2024年第6期26卷 79-87页

作者：王森张权治马方方 Maksudbek YUSUPOV 王友年 School of Physics Dalian University of TechnologyDalian 116024People’s Republic of China lab.ratory of Thermal Physics of Multiphase Systems Arifov Institute of Ion-Plasma and Laser TechnologiesAcademy of Sciences of UzbekistanTashkent 100125Uzbekistan Department of Power Supply and Renewable Energy Sources National Research University TIIAMETashkent 100000Uzbekistan

A two-dimensional fluid model based on COMSOL Multiphysics is developed to investigate the modulation of static magnetic field on plasma homogeneity in a capacitively coupled plasma(CCP)chamber. To generate a static magnetic field, direct current is applied to a circular coil located at the top of the chamber. By adjusting the magnetic field's configuration, which is done by altering the coil current and position, both the plasma uniformity and density can be significantly modulated. In the absence of the magnetic field, the plasma density exhibits an inhomogeneous distribution characterized by higher values at the plasma edge and lower values at the center. The introduction of a magnetic field generated by coils results in a significant increase in electron density near the coils. Furthermore, an increase in the sets of coils improves the uniformity of the plasma. By flexibly adjusting the positions of the coils and the applied current,a substantial enhancement in overall uniformity can be achieved. These findings demonstrate the feasibility of using this method for achieving uniform plasma densities in industrial applications.

关键词： COMSOL capacitively coupled plasma plasma uniformity magnetic field

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Functions and applications of polypyridyl complexes in DNA

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Chinese Science Bulletin 2001年第16期46卷 1332-1337页

作者： Ji, LN Zhang, QL Chao, H Zhongshan Univ Dept Chem State Key Lab Ultrafast Laser Spectroscopy Key Lab Gene EngnMinist Educ China Guangzhou 510275 Peoples R China

The syntheses and desymmetration of a series of novel polypyridyl ligands as well as their complexes, and their DNA-binding properties are reported in this review. The stresses are focused on the functions and potential applications of such complexes as DNA structural probe, DNA molecular light switches, anti-cancer drugs, and photoactivated cleavage agents.

关键词： DNA structural probe cleaving agent molecular light switch chemical nuclease.

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Model of chromophore coupling in allophycocyanin aggregation

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Chinese Science Bulletin 1998年第14期43卷 1224-1229页

作者： Fuli Zhao Xiguang Zheng Jingmin Zhang Hezhou Wang Jingquan Zhao Lijin Jiang Zhongshan Univ Inst Laser & Spect State Key Lab Ultrafast Laser Spect Canton 510275 Peoples R China Chinese Acad Sci Inst Photog Chem Beijing 100101 Peoples R China

A new model is proposed to study the interaactions among chromphores in APC trimer. Using this model, the electronic transition frequencies are calculated. The results are in good agreement with the experimental.

关键词： Allophycocyanin Exciton coupling Electronic transition

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A von-Neumann-like photonic processor and its application in studying quantum signature of chaos

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Light(Science & Applications) 2024年第4期13卷 672-681页

作者： Shang Yu Wei Liu Si-Jing Tao Zhi-Peng Li Yi-Tao Wang Zhi-Peng Zhong Raj BPatel Yu Meng Yuan-Ze Yang Zhao-An Wang Nai-Jie Guo Xiao-Dong Zeng Zhe Chen Liang Xu Ning Zhang Xiao Liu Mu Yang Wen-Hao Zhang Zong-Quan Zhou Jin-Shi Xu Jian-Shun Tang Yong-Jian Han Chuan-Feng Li Guang-Can Guo CAS Key lab.ratory of Quantum Information University of Science and Technology of ChinaHefei 230026China. CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China. Hefei National lab.ratory University of Science and Technology of ChinaHefei 230088China. Research Center for Quantum Sensing Zhejiang LabHangzhou 310000China. Quantum Optics and laser Science Blackett LaboratoryImperial College LondonPrince Consort RdLondon SW72AZUK. Clarendon lab.ratory Department of PhysicsOxford UniversityParks Road OX13PUOxfordUK

Photonic quantum computation plays an important role and offers unique *** decades after the milestone work of Knill-Laflamme-Milburn,various architectures of photonic processors have been proposed,and quantum advantage over classical computers has also been *** is now the opportune time to apply this technology to real-world ***,at current technology level,this aim is restricted by either programmability in bulk optics or loss in integrated optics for the existing architectures of processors,for which the resource cost is also a *** we present a von-Neumann-like architecture based on temporal-mode encoding and looped structure on table,which is capable of multimode-universal programmability,resource-efficiency,phasestability and *** order to illustrate these merits,we execute two different programs with varying resource requirements on the same processor,to investigate quantum signature of chaos from two aspects:the signature behaviors exhibited in phase space(13 modes),and the Fermi golden rule which has not been experimentally studied in quantitative way before(26 modes).The maximal program contains an optical interferometer network with 1694 freely-adjustable *** current state-of-the-art,our architecture stands as the most promising candidate for real-world applications.

关键词： quantum signature chaos

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Few-layer graphene film fabricated by femtosecond pulse laser deposition without catalytic layers

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Chinese Optics Letters 2015年第2期13卷 67-70页

作者：董祥明刘世炳宋海英谷鹏李小丽 Strong-field and ultrafast Photonics lab Institute of Laser Engineering Beijing University of Technology

The films of few-layer graphene are formed through laser exfoliation of a highly ordered pyrolytic graphite（HOPG）, without a catalytic layer for the growth process. The femtosecond（fs） laser exfoliation process is investigated at different laser fluences and substrate temperature. For fs laser exfoliation of HOPG, the few-layer graphene is obtained at 473 K under an optimal laser fluence. The formation of few-layer graphene is explained by removal of intact graphite sheets occurred by an optimal laser fluence ablation. The new insights may facilitate the controllab.e synthesis of large area few-layer graphene.

关键词： Electromagnetic pulse Graphite ultrafast lasers

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Effect of metal surface morphology on nano-structured patterns induced by a femtosecond laser pulse and its experimental verification

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Chinese Optics Letters 2018年第7期16卷 88-91页

作者：宋海英谭胜旺诗梦张艳杰刘世炳李瑶刘海云 Strong-Field and ultrafast Photonics lab Institute of Laser EngineeringBeijing University of Technology

The effect of material surface morphology on the periodic subwavelength of nano-structures induced by a femtosecond（fs） laser was investigated systematically from the initial surface roughness, the different scratches, the pre-formed ripples, and the ＂layer-carving＂ technology experiments. The results of the comparative experiments indicate that the initial surface conditions of the target surface have no obvious effects on the spatial structured periods（SSPs） and the ripple orientation of the periodic nano-structures induced by a fs laser, which agreed well with the foretold present surface two-plasmon resonance（STPR） model. Furthermore, different shapes of nanogrids with high regularity and uniformity were obtained by fs-laser fabrication.

关键词： Effect of metal surface morphology on nano-structured patterns induced by a femtosecond laser pulse and its experimental verification

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Femtosecond laser induced periodic large-scale surface structures on metals

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Chinese Optics Letters 2015年第7期13卷 48-51页

作者：董祥明宋海英刘世炳 Strong-Field and ultrafast Photonics lab Institute of Laser EngineeringBeijing University of Technology

The periodic ripple structures on wolfram and titanium surfaces are induced experimentally by linear polarized femtosecond laser pulses at small incident angles. The structural features show a material difference in the s- and p-polarized laser irradiation. The interspace between the ripples increases significantly for p-polarized laser irradiation when it exceeds a threshold angle, and the ripples＇ periodicities are larger than the wavelength of the incident p-polarized femtosecond laser; however, no significant change in the period of the ripples is observed with increasing incident angle for s-polarized laser irradiation. To explain these phenomena we propose a resonant absorption mechanism, by which the experimental observations can be interpreted.

关键词： Angle measurement Irradiation laser pulses Periodic structures ultrafast lasers

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