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Laser Manipulation of Micro Untransmissive Particles in Water
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作者 Masahiro OTA Makoto SHIMODA Yuuki SUSAI 《Journal of Thermal Science》 SCIE EI CAS CSCD 2009年第1期85-90,共6页
The laser trapping of untransmissive particles are discussed in this paper. Photon can generate the momentum tothe untransmissive particle by diffraction and reflection on the surface of the particles. We tried laser ... The laser trapping of untransmissive particles are discussed in this paper. Photon can generate the momentum tothe untransmissive particle by diffraction and reflection on the surface of the particles. We tried laser trapping ofuntransmissive particles using an attractive force caused by the diffraction and radiation force caused by reflection.The laser trapping system includes CW YAG laser, which has 1.064 μm in wave length and an optical microscope.The motions of particles were monitored by a CCD camera on the top of the microscope and recordedby PC connected to the CCD camera. 展开更多
关键词 laser manipulation laser trapping Optical tweezers Micro manipulation Micro sphere
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Laser-manipulated the of a harmonically multiphoton transitions trapped particle
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作者 陈琼 海阔 海文华 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第12期3662-3667,共6页
A single particle magneto-confined in a one-dimensional (1D) quantum wire experiences a harmonic potential, and imposing a sharply focused laser beam on an appropriate site shapes a δ potential. The theoretical inv... A single particle magneto-confined in a one-dimensional (1D) quantum wire experiences a harmonic potential, and imposing a sharply focused laser beam on an appropriate site shapes a δ potential. The theoretical investigation has demonstrated that for a sufficiently strong δ pulse the quantum motional stationary state of the particle is one of the eigenstates of the free harmonic oscillator, and it is determined by the site of the laser beam uniquely, namely a quantum state is admissible if and only if the laser site is one of its nodes. The numerical computation shows that all the nodes of the lower energy states with quantum numbers n ≤ 20, except the coordinate origin, are mutually different. So we can manipulate the multiphoton transitions between the quantum states by adjusting the position of the laser δ pulse and realize the transition from an unknown higher excitation state to a required lower energy state. 展开更多
关键词 quantum wire magnetically trap laser manipulation multiphoton transition
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All-optical driven soft crawler with complexmotion capabilities
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作者 Chenchu Zhang Jin Wang +9 位作者 Linhan Zhao Renfei Chen Qiangqiang Zhao Jie Zhao Fating Liu Yucheng Bian Heng Zhang Yisen Wang Chaowei Wang Ying Hu 《International Journal of Smart and Nano Materials》 SCIE EI 2024年第2期348-364,共17页
The emergence of millimeter-scale soft actuators has signifi-cantly expanded the potential applications in areas such as search and rescue,drug delivery,and human assistance,due to their high flexibility.Despite these... The emergence of millimeter-scale soft actuators has signifi-cantly expanded the potential applications in areas such as search and rescue,drug delivery,and human assistance,due to their high flexibility.Despite these advancements,achieving precise control over the intricate movements of soft crawlers poses a significant challenge.In this study,we have developed an all-optical approach that enables manipulation of propul-sive forces by simultaneously modifying the magnitude and direction of friction forces,thereby enabling complex motions of soft actuators.Importantly,the approach is not constrained by specific actuator shapes,and theoretically,any elongated photothermal actuator can be employed.The actuator was designed with an isosceles trapezoid shape,featuring a top width of 2mm,a bottom width of 4 mm,and a length of 8 mm.Through our,manipulation approach,we showcase a proof-of-concept for complex soft robotic motions,including crawling(achieving speeds of up to 2.25 body lengths per minute),turning,avoiding obstacles,handling and trans-ferring objects approximately twice its own weight,and navi-gating narrow spaces along programmed paths.Our results showcasethis all-optical manipulationapproach as a promising,yet unexplored tool for the precision and wireless control for the development of advanced soft actuators. 展开更多
关键词 Light driven soft actuator all-optical manipulation laser manipulation
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Engineering multipartite steady entanglement of distant atoms via dissipation 被引量:2
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作者 Zhao Jin S.-L. Su +2 位作者 Ai-Dong Zhu Hong-Fu Wang Shou Zhang 《Frontiers of physics》 SCIE CSCD 2018年第5期165-174,共10页
We propose a scheme for generating an entangled state for three atoms trapped in separate optical cavities that are coupled to each other through two optical fibers based on coherent driving and dissi- pation, which a... We propose a scheme for generating an entangled state for three atoms trapped in separate optical cavities that are coupled to each other through two optical fibers based on coherent driving and dissi- pation, which are induced by the classical fields and the decay of non-local bosonic modes, respectively. In our scheme, the interaction time need not be controlled strictly in the overall dynamics process, and the cavity field decay can be changed into a vital resource. The numerical simulation shows that the fidelity of the target state is insensitive to atomic spontaneous emission, and our scheme is good enough to generate the W state of distant atoms with a high fidelity and purity. In addition, the present scheme can also be generalized to prepare the N-partite W state of distant atoms. 展开更多
关键词 steady-state entanglement dissipative dynamics laser manipulation
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