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Dynamic of Polystyrene Microsphere Linking to DNA Molecule under optical tweezer

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Journal of Physical Science and Application 2014年第5期4卷 333-338页

作者： Lanh Van Chu Dinh Trung Thai Quang Quy Ho Vinh University Nghean Vietnam Institute of Applied Physics NEWTECHPRO VAST 8 Hoang Quoc Viet Hanoi Vietnam

Up to now there are many works investigated the stretched state of deoxyribonucleic axid （DNA） by optical trap. The main purpose of mentioned works is to find out the elastic force-extension characterisitic approximatelly based on the experimental parameters. In experiments, the optical force is seem as an apply force, but not an own elastic force of DNA molecules. To use sufficiently optical tweezer to manipulate and hold the DNA molecules keeping in stretched state, it is necessary to use the elastic as one force contributing to process trapping it, and consequently, the term describing elastic force must be present in the general Langevin equation （GLE） describing the dynamic of driven bead linking to DNA molecule. In this paper, the finite difference equation of GLE is derived for simulation the dynamic of bead linking to DNA molecule embedded in the fluid. The process manipulation of polystyrene bead to tweezer center is simulated and discussed. From results, the role of Brownian force, elastic force and optical force on process trapping driven bead is evaluated. Moreover, the trapping time, velocity of bead are discussed, too.

关键词： optical tweezer Brownian motion Langevin equation DNA molecule stretch force.

Dynamic of the Dielectric Nano-Particle in optical tweezer Using Counter-Propagating Pulsed Laser Beams

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Journal of Physical Science and Application 2012年第9期2卷 345-351页

作者： Quang Quy Ho Dinh Hal Hoang Institute of Applied Physics NEWTECHPRO VAST 8 Hoang Quoc Viet Hanoi Vietnam. Pedagogical College of Nghean Vietnam

In this article, the dynamical process of the dielectric particle in the optical tweezer using the counter-propagating Gaussian pulses is investigated by the Langevin equation concerning the Brownian motion. The temporal stabilities of particle is simulated. The influence of the duration, repetition period and delay time between pulses on stability is discussed.

关键词： optical trap optical tweezer Gaussian pulsed beam optical force Brownian motion Langevin equation.

Efficient loading of a single neutral atom into an optical microscopic tweezer

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Chinese Physics B 2015年第4期24卷 180-183页

作者：何军刘贝刁文婷王杰英靳刚王军民 State Key Laboratory of Quantum Optics and Quantum Optics Devices and Institute of Opto-Electronics Shanxi University

A single atom in a magneto--optical trap （MOT） with trap size （hundreds of micrometers） can be transferred into an optical microscopic tweezer with a probability of -100%, The ability to transfer a single atom into two traps back and forth allows us to study the loading process. The loading probability is found to be insensitive to the geometric overlap of the MOT and the tweezer. It is therefore possible to perform simultaneously loading of a single atom into all sites of the tweezer array for many qubits. In particular, we present a simulation of the one-dimensional and two-dimensional arrays of an optical microscopic tweezer. We find the same qualitative behavior for all of the trap parameters.

关键词： single atom magneto--optical trap optical tweezer loading process

optical manipulation from the microscale to the nanoscale: fundamentals, advances and prospects

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Light(Science & Applications) 2017年第1期6卷 593-607页

作者： Dongliang Gao Weiqiang Ding Manuel Nieto-Vesperinas Xumin Ding Mahdy Rahman Tianhang Zhang ChweeTeck Lim Cheng-Wei Qiu Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore College of Physics Optoelectronics and EnergySoochow UniversitySuzhou 215006China Department of Physics Harbin Institute of TechnologyHarbin 150001China Instituto de Ciencia de Materiales de Madrid Consejo Superior de Investigaciones CientíficasCampus de CantoblancoMadrid 28049Spain Department of Electrical and Computer Engineering North South UniversityDhaka 1229Bangladesh NUS Graduate School for Integrative Sciences and Engineering National University of SingaporeSingapore 117456Singapore Department of Mechanical Engineering National University of SingaporeSingapore 117576Singapore SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology Shenzhen UniversityShenzhen 518060China

Since the invention of optical tweezers,optical manipulation has advanced significantly in scientific areas such as atomic physics,optics and biological *** in the past decade,numerous optical beams and nanoscale devices have been proposed to mechanically act on nanoparticles in increasingly precise,stable and flexible *** the linear and angular momenta of light can be exploited to produce optical tractor beams,tweezers and optical torque from the microscale to the *** on optical forces helps to reveal the nature of light–matter interactions and to resolve the fundamental aspects,which require an appropriate description of momenta and the forces on objects in *** this review,starting from basic theories and computational approaches,we highlight the latest optical trapping configurations and their applications in bioscience,as well as recent advances down to the ***,we discuss the future prospects of nanomanipulation,which has considerable potential applications in a variety of scientific fields and everyday life.

关键词： biochemical manipulation microscale nanoscale optical force optical tweezer plasmonics

A universal algorithm for defect-free atomic array with arbitrary periodic geometries[Invited]

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Chinese Optics Letters 2023年第11期21卷 86-91页

作者：周耀庭王绍雄陈嘉怡胡逸飞徐忠孝申恒 State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-electronicsShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

The defect-free neutral atom array has emerged as an ideal platform to investigate complex many-body physics of interacting quantum particles,offering the opportunities for quantum simulation and quantum-enhanced *** fast build a large-scale quantum system,we design a sorting-atom algorithm with maximum *** with previous protocols,our method saves the rearrangement time by sorting row-by-row and is also universal to arbitrary periodic patterns with no need to change the *** present the generation of a defect-free square and other periodic geometries and demonstrate the potential to scale up a defect-free array to 2500 atoms with only about 180 steps of rearrangement.

关键词： optical tweezer defect-free atomic array

A review of optically induced rotation

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Frontiers of Information Technology & Electronic Engineering 2022年第2期23卷 171-185页

作者： Qi ZHU Nan LI Heming SU Wenqiang LI Huizhu HU State Key Laboratory of Modern optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China Zhejiang Lab Hangzhou 311121China

The optical rotation technique arose in the 1990 *** tweezer brought an ideal platform for research on the angular momentum of laser *** decades,the optical rotation technique has been widely applied in laboratory optical manipulation and the fields of biology and ***,it has attracted much attention for its potential in the classical and quantum *** this work,we review the progress of experiments and applications of optically induced ***,we introduce the basic exploration of angular ***,we cover the development and application of optical rotation induced by orbital angular momentum,and the spin angular momentum is ***,we elaborate on recent applications of the optical rotation technique in high *** precise optical manipulation in a liquid medium enters its maturity,optical tweezers in high vacuum open a new path for the high-speed micro-rotor.

关键词： optical tweezer optically induced rotation Angular momentum Micro-rotor