scholarly journals Tuning optical trapping of metal-dielectric hybrid nanoparticles under ultrafast pulsed excitation: A theoretical investigation

2021 ◽  
Author(s):  
Anita Devi ◽  
Shruthi Nair ◽  
Sumit Yadav ◽  
Arijit Kumar De
Keyword(s):  
Theoretical Investigation ◽  
Optical Trapping ◽  
Hybrid Nanoparticles ◽  
Pulsed Excitation ◽  
Force Potential

Crucial to effective optical trapping is the ability to precisely control the nature of force/potential to be attractive or repulsive. The nature of particle being trapped is as important as...

scholarly journals Deciphering single- and multi-particle trapping dynamics under femtosecond pulsed excitation with simultaneous spatial and temporal resolution

2022 ◽  
Author(s):  
Anita Devi ◽  
Sumit Yadav ◽  
Arijit De
Keyword(s):  
Temporal Resolution ◽  
Nonlinear Optical ◽  
Optical Trapping ◽  
Experimental Studies ◽  
Video Microscopy ◽  
Experimental Results ◽  
Particle Trapping ◽  
Pulsed Excitation ◽  
Shed Light ◽  
Confocal Detection

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.

Exploring the physics of efficient optical trapping of dielectric nanoparticles with ultrafast pulsed excitation

2015 ◽  
Vol 54 (23) ◽  
pp. 7002 ◽  
Author(s):  
Debjit Roy ◽  
Debabrata Goswami ◽  
Arijit K. De
Keyword(s):  
Optical Trapping ◽  
Pulsed Excitation
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