optical trapping
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2022 ◽  
Xingyi Li ◽  
Yuan Zhou ◽  
Suyang Ge ◽  
Guoxi Wang ◽  
siqi li ◽  

2022 ◽  
Anita Devi ◽  
Sumit Yadav ◽  
Arijit De

Abstract Recent theoretical and experimental studies have shed light on how optical trapping dynamics under femtosecond pulsed excitation are fine-tuned by optical and thermal nonlinearities. Here, we present experimental results of nonlinear optical trapping of single and multiple polystyrene beads (of 1 μm diameter). We show how integration and synchronization of bright-filed video microscopy with confocal detection of backscatter provide both spatial and temporal resolution required to capture intricate details of trapping dynamics. Such spatiotemporal detection is promising to have far-reaching applications in exploring controlled optical trapping and manipulations harnessed by optical and thermal nonlinearities.

Optica ◽  
2022 ◽  
Yosuke Minowa ◽  
Xi Geng ◽  
Kokado Keisuke ◽  
Kentaro Sato ◽  
Tatsuya Kameyama ◽  

2022 ◽  
Vol 148 ◽  
pp. 106773
Jisen Wen ◽  
Binjie Gao ◽  
Guiyuan Zhu ◽  
Dadong Liu ◽  
Li-Gang Wang

2022 ◽  
Vol 32 ◽  
pp. 105076
Wen Zuo ◽  
Ya-Shuai Han ◽  
Zheng-Lan Zhou ◽  
Hua-Feng Xu ◽  
Zheng-Xian Zhou ◽  

2022 ◽  
Vol 52 (1) ◽  
pp. 22-27
P B Ermolinskiy ◽  
A E Lugovtsov ◽  
A N Semenov ◽  
A V Priezzhev

Abstract We consider the effect of a tightly focused laser beam with a wavelength of 1064 nm and a power from 10 to 160 mW on red blood cells during their optical trapping with optical tweezers. It is found that the shape of a red blood cell, which alters after optical trapping, ceases to change when the trapping duration is less than 5 min and the laser beam power is less than 60 mW. At a beam power above 80 mW, the red blood cell begins to fold at a trapping duration of about 1 min, and at powers above 100-150 mW, the red blood cell membrane ruptures in 1-3 min after optical trapping. It is also found that with repeated short-term capture of a red blood cell in an optical trap, the deformation properties of the membrane change: it becomes more rigid. The obtained results are important both for understanding the mechanisms of interaction of a laser beam with red blood cells and for optimising the technique of optical experiments, especially for measuring the deformation properties of a membrane using optical tweezers.

Nano Letters ◽  
2021 ◽  
Xiaoting Zhao ◽  
Yang Shi ◽  
Ting Pan ◽  
Dengyun Lu ◽  
Jianyun Xiong ◽  

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