Results 81 to 90 of about 4,295 (184)

Flux reversal in a two-state symmetric optical thermal ratchet

, 2005
A Brownian particle's random motions can be rectified by a periodic potential energy landscape that alternates between two states, even if both states are spatially symmetric.
David G. Grier, H. Risken, M. I. Dykman, P. Hanggi, Sang-Hyuk Lee   +4 more
core   +1 more source

Red Blood Cell-Based Biological Micromotors Propelled by Spiral Optical Fields

Photonics
Micromotors play a crucial role in microsystems technology, with applications in nanoparticle propulsion, targeted drug delivery, and biosensing. Optical field propulsion, particularly optical tweezers (OTs), enables precise, noncontact control but ...
Kunpeng Wang, Zhelin Qu, Yifei Chen, Tianli Wu, Chao Feng, Jian Zhang, Xian Zhao, Jun-Lei Wang   +7 more
doaj   +1 more source

Holographic Imaging Reveals the Mechanism of Wall Entrapment in Swimming Bacteria

Physical Review X, 2017
Self-propelled particles, both biological and synthetic, are stably trapped by walls and develop high concentration peaks over bounding surfaces. In swimming bacteria, like E. coli, the physical mechanism behind wall entrapment is an intricate mixture of
Silvio Bianchi, Filippo Saglimbeni, Roberto Di Leonardo   +2 more
doaj   +1 more source

TE1 mode emission in DFB semiconductor lasers based on hybrid mode resonance

APL Photonics
We theoretically analyzed the hybrid transverse mode resonance characteristics of a π-phase-shifted anti-symmetric Bragg grating distributed feedback semiconductor laser and experimentally demonstrated this phenomenon for the first time.
Shenghong Xie, Miao Xv, Yong Zhao, Yining Liang, Laiwen Yu, Tongtong Yang, Lianping Hou, Xiangfei Chen, Feng Wang, Yuechun Shi   +9 more
doaj   +1 more source

Artificial potential field-empowered dynamic holographic optical tweezers for particle-array assembly and transformation

PhotoniX
Owing to the ability to parallel manipulate micro-objects, dynamic holographic optical tweezers (HOTs) are widely used for assembly and patterning of particles or cells. However, for simultaneous control of large-scale targets, potential collisions could
Xing Li, Yanlong Yang, Shaohui Yan, Wenyu Gao, Yuan Zhou, Xianghua Yu, Chen Bai, Dan Dan, Xiaohao Xu, Baoli Yao   +9 more
doaj   +1 more source

Growing Dynamical Facilitation on Approaching the Random Pinning Colloidal Glass Transition

, 2014
Despite decades of research, it remains to be established whether the transformation of a liquid into a glass is fundamentally thermodynamic or dynamic in origin.
Ganapathy, Rajesh, Gokhale, Shreyas, Nagamanasa, K. Hima, Sood, A. K.   +3 more
core   +1 more source

An atom-by-atom assembler of defect-free arbitrary 2d atomic arrays

, 2016
Large arrays of individually controlled atoms trapped in optical tweezers are a very promising platform for quantum engineering applications. However, to date, only disordered arrays have been demonstrated, due to the non-deterministic loading of the ...
Barredo, Daniel, Browaeys, Antoine, de Léséleuc, Sylvain, Lahaye, Thierry, Lienhard, Vincent   +4 more
core   +3 more sources

"Super-resolution" holographic optical tweezers array

Aligning light spots into arbitrary shapes is a fundamental challenge in holography, leading to various applications across diverse fields in science and engineering. However, as the spot interval approaches the wavelength of light, interference effects among the spots become prominent, which complicates the generation of a distortion-free alignment ...
Nishimura, Keisuke, Sakai, Hiroto, Tomita, Takafumi, de Léséleuc, Sylvain, Ando, Taro   +4 more
openaire   +2 more sources

Precision Construction of Chiral Optical Fields with Nine Controllable Degrees of Freedom

Advanced Photonics Research
Recently, chiral optical fields (COFs) have garnered significant attention due to their multiple controllable degrees of freedom (DOFs), enabling applications in diverse areas such as optical tweezers, manufacturing, and holographic encryption.
Duo Deng, Xing Liu, Zixin Xu, Zhenjun Yang, Yan Li   +4 more
doaj   +1 more source

Stimulus-responsive colloidal sensors with fast holographic readout

, 2015
Colloidal spheres synthesized from polymer gels swell by absorbing molecules from solution. The resulting change in size can be monitored with nanometer precision using holographic video microscopy. When the absorbate is chemically similar to the polymer
Grier, David G., Moyses, Henrique W., Wang, Chen   +2 more
core   +1 more source