Article
Optics
A. P. Porfirev, S. A. Fomchenkov, D. P. Porfiriev, S. N. Khonina, S. V. Karpeev
Summary: In this study, we investigate the possibility of trapping airborne light-absorbing particles using a multi-linear optical trap created with a cylindrical lens. We find that different shaped light lines can be used to trap particles of different sizes due to the photophoretic forces being dependent on light intensity. However, the fading intensity of non-main light lines caused by initial laser power attenuation leads to a significant decrease in trapping robustness and the escape of smaller trapped particles.
Article
Mechanics
D. J. S. Pereira, M. R. O. Panao
Summary: This study synthesizes, criticizes, and compares different models for quantifying photophoretic forces in the slip-flow regime, finding that the Loesche and Husmann model is both simple and accurate. However, more experiments are needed to validate the models, especially considering the effect of high irradiance levels on photophoretic forces. The study also provides a physical interpretation of asymmetry factors in the photophoretic models.
Article
Instruments & Instrumentation
Dylan Barton, Braden Huffman, Ximena Briceno, Tanner Darm, Daniel Smalley
Summary: This note introduces a test rig for optimizing trapping parameters of optical trap displays. The rig allows targeted experimentation on software, hardware, and environmental variables to improve particle trapping success and robustness, achieving high accuracy and low error rate while reducing size, user overhead, and cost for rapid research development.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Multidisciplinary Sciences
Riley Kuttler, Dylan Barton, Brenden Weaver, Alexander Steffan, Braden Huffman, Steven Griffith, Daniel Smalley
Summary: This paper presents an automated, rapid-fab-compatible, photophoretic trap test rig for volumetric display research, capable of testing critical parameters at a rate of 250 samples per hour, broadening the scope of optical trap display parameters and researchers through accessibility and democratization.
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
(2021)
Article
Engineering, Electrical & Electronic
Amr Wageeh, Salwa El-Sabban, Diaa Khalil
Summary: This paper presents simple design equations for optical phase shifter configurations on both single mode and multimode platforms. These equations are based on approximate analytical expressions that describe the phase shift between a reference waveguide and a phase shifter. The validity of the design formula is tested using standard Beam Propagation Method, and the results agree well with numerical calculations, demonstrating the usefulness of these closed form expressions in the optical design of phase shifters.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Instruments & Instrumentation
Dmitry S. Bykov, Maximilian Meusburger, Lorenzo Dania, Tracy E. Northup
Summary: In this study, a microparticle is confined in a hybrid potential created by a Paul trap and a dual-beam optical trap. The particle is transferred between the Paul trap and the optical trap at different pressures, and the influence of feedback cooling on the transfer process is examined. This technique provides a pathway for experiments with optically levitated particles in ultra-high vacuum and in potentials with complex structures.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Optics
Aaron Schapers, Olav Gaute Helleso, Jochen Fick
Summary: Stable and reproducible trapping of 1 μm and 500 nm dielectric particles in air has been achieved using a dual beam optical fiber tweezers with cleaved commercial single mode fibers. The influence of interference fringes from two coherent and counter-propagating trapping beams is investigated by controlling fringe visibility. The experimental results are confirmed by numerical simulations.
OPTICS COMMUNICATIONS
(2023)
Article
Optics
Zhenwu Mo, You Wu, Zejia Lin, Junjie Jiang, Danlin Xu, Haiqi Huang, Haobin Yang, Dongmei Deng
Summary: This paper investigates the propagation properties of the odd-Pearcey Gaussian beam (OPGB) in a parabolic potential. It is found that, in addition to auto-focusing at the focal plane, the OPGB unexpectedly performs weak off-axis focusing. By choosing an appropriate parabolic parameter, the focusing distance and focal intensity can be adjusted.
Article
Multidisciplinary Sciences
Mingxuan Sun, Hossein Amiri, Alexander B. Tong, Keishi Shintomi, Tatsuya Hirano, Carlos Bustamante, Rebecca Heald
Summary: This study used a physiological, cell-free system to investigate the real-time formation and disassembly of mitotic chromatin fibers. The findings suggest that the core histone chaperone ASF1 and linker histone H1 play important roles in mitotic DNA compaction. The metaphase extract, compared to the interphase extract, showed a greater ability to compact DNA.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Optics
Hao Wu, Chunlei Jiang, Shaopeng Tian, Shangzhao Shao, Hangyu Yue, Xiangyu Cui, Bingkun Gao, Xiufang Wang, Peng Chen
Summary: This paper presents a multifunctional single-fiber optical tweezer for particle trapping and transport. By modifying the structure of the fiber probe and using laser sources with different wavelengths and modes, non-contact trapping and long-distance transport of particles can be achieved.
CHINESE OPTICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Luciana P. Martinez, Santiago Poklepovich-Caride, Julian Gargiulo, Eduardo D. Martinez, Fernando D. Stefani, Paula C. Angelome, Ianina L. Violi
Summary: Obtaining single nanoparticles with complex three-dimensional shapes is currently a challenge. We investigated the optical printing of gold nanostars and found that tuning the laser to the nanostars' resonant frequencies allows for their deposition without reshaping. This research has implications for the fabrication of complex nanoparticle arrays.
Article
Engineering, Electrical & Electronic
Arnav Dasgupta, Rintu Kr Gayen, Partha Sona Maji
Summary: This paper presents a comparative study of optical Tamm plasmon (OTP) realized with single metal and bimetallic combinations. The study investigates different parameters of the structural configuration and evaluates the sharpness of the resonance and quality factors for both single metal and bimetallic combination. Sensor applications are also explored and the performances of the two configurations are compared. The findings suggest that while the single metal configuration has higher detection accuracy and quality factor, the spectral and amplitude sensitivity are almost identical between the two types of sensors. The bimetallic configuration can address the issues of oxidation and propagation losses in the single metal usage.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Multidisciplinary Sciences
Ian L. Morgan, Omar A. Saleh
Summary: This article introduces how to calibrate forces in single-molecule force spectroscopy experiments using the Tweezepy software package, and estimates parameters and their uncertainties through methods like PSD and AV. Tweezepy is well-documented, fast, and easy to use, effectively addressing common biases in experiments.
Article
Multidisciplinary Sciences
C. J. Baker, W. Bertsche, A. Capra, C. Carruth, C. L. Cesar, M. Charlton, A. Christensen, R. Collister, A. Cridland Mathad, S. Eriksson, A. Evans, N. Evetts, J. Fajans, T. Friesen, M. C. Fujiwara, D. R. Gill, P. Grandemange, P. Granum, J. S. Hangst, W. N. Hardy, M. E. Hayden, D. Hodgkinson, E. Hunter, C. A. Isaac, M. A. Johnson, J. M. Jones, S. A. Jones, S. Jonsell, A. Khramov, P. Knapp, L. Kurchaninov, N. Madsen, D. Maxwell, J. T. K. McKenna, S. Menary, J. M. Michan, T. Momose, P. S. Mullan, J. J. Munich, K. Olchanski, A. Olin, J. Peszka, A. Powell, P. Pusa, C. O. Rasmussen, F. Robicheaux, R. L. Sacramento, M. Sameed, E. Sarid, D. M. Silveira, D. M. Starko, C. So, G. Stutter, T. D. Tharp, A. Thibeault, R. I. Thompson, D. P. van der Werf, J. S. Wurtele
Summary: Laser cooling, a widely-used technique in various fields, has now been successfully applied to anti-hydrogen atoms, leading to significant advancements in antimatter research. By using pulsed, narrow-linewidth laser radiation, researchers were able to Doppler-cool a sample of magnetically trapped anti-hydrogen, demonstrating the ability to manipulate the motion of anti-atoms with laser light and opening up groundbreaking opportunities for future experiments.
Article
Chemistry, Physical
Johannes Frueh, Sven Rutkowski, Tieyan Si, Yu-Xuan Ren, Meiyu Gai, Sergei I. Tverdokhlebov, Guangyu Qiu, Jean Schmitt, Qiang He, Jing Wang
Summary: This study reports on the optical trapping of two artificial plasmonic microparticles: one with isotropic nanoparticles covering the surface (homogeneous particle) and an anisotropic Janus micro-particle coated with a gold nano-layer. The plasmonic gold nanostructures absorb light energy and produce heat, significantly affecting the optical trapping. The developed method allows for determining both photophoretic and thermophoretic forces acting on the particles, providing new paths for micromachine analysis and control.
APPLIED SURFACE SCIENCE
(2021)
Article
Biochemical Research Methods
Meixiu Sun, Zhuying Chen, Zhiyong Gong, Xiaomeng Zhao, Chenyu Jiang, Yuan Yuan, Zhennang Wang, Yingxin Li, Chuji Wang
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2015)
Article
Physics, Applied
Chuji Wang, Zhiyong Gong, Yong-Le Pan, Gorden Videen
APPLIED PHYSICS LETTERS
(2015)
Article
Instruments & Instrumentation
Meixiu Sun, Chenyu Jiang, Zhiyong Gong, Xiaomeng Zhao, Zhuying Chen, Zhennan Wang, Meiling Kang, Yingxin Li, Chuji Wang
REVIEW OF SCIENTIFIC INSTRUMENTS
(2015)
Article
Physics, Applied
Chuji Wang, Zhiyong Gong, Yong-Le Pan, Gorden Videen
APPLIED PHYSICS LETTERS
(2016)
Article
Optics
Zhiyong Gong, Yong-Le Pan, Chuji Wang
Article
Chemistry, Analytical
Zhiyong Gong, Yong-Le Pan, Gorden Videen, Chuji Wang
ANALYTICA CHIMICA ACTA
(2018)
Review
Optics
Zhiyong Gong, Yong-Le Pan, Gorden Videen, Chuji Wang
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2018)
Article
Instruments & Instrumentation
Zhiyong Gong, Yong-Le Pan, Gorden Videen, Chuji Wang
APPLIED SPECTROSCOPY
(2019)
Article
Optics
Haifa Alali, Zhiyong Gong, Gorden Videen, Yong-Le Pan, Olga Munoz, Chuji Wang
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2020)
Article
Chemistry, Physical
Zhiyong Gong, Yong-Le Pan, Gorden Videen, Chuji Wang
CHEMICAL PHYSICS LETTERS
(2017)
Article
Biochemistry & Molecular Biology
Chen Zhu-Ying, Sun Mei-Xiu, Gong Zhi-Yong, Yuan Yuan, Zhao Xiao-Meng, Liu Wei-Chao, Jiang Chen-Yu, Wang Zhen-Nan, Li Ying-Xin
PROGRESS IN BIOCHEMISTRY AND BIOPHYSICS
(2015)