Fiber-Based Single Aerosol Optical Trapping and Manipulations

Zhang, Ling

Fiber-Based Single Aerosol Optical Trapping and Manipulations

Zhang, Ling

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Publication Type:: Thesis
Issue Date:: 2023

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Field	Value	Language
dc.contributor.author	Zhang, Ling
dc.date.accessioned	2023-11-26T22:01:04Z
dc.date.available	2023-11-26T22:01:04Z
dc.date.issued	2023
dc.identifier.uri	http://hdl.handle.net/10453/173563
dc.description	University of Technology Sydney. Faculty of Engineering and Information Technology.	en_US.UTF-8
dc.description.abstract	Aerosols, comprising dispersed solid or liquid particles in gases, serve diverse functions with substantial economic implications. From everyday items like air fresheners and asthma inhalers to extensive emissions from industrial sources and vehicles, aerosols have far-reaching effects, causing local and global pollution, which poses health risks. Additionally, they wield a profound influence on our climate system, contributing to atmospheric processes that regulate planetary temperatures and curb unchecked warming. Studying and isolating single aerosol processes is, however, still in its infant phase. Many processes at the single aerosol level are still not yet fully understood. This thesis endeavours to establish an advanced platform for trapping individual aerosol particles, utilizing fiber-based optical traps. Through the synergy of counter-propagating (CP) dual fiber trapping techniques and sophisticated beam shaping algorithms, this platform transcends conventional constraints in single aerosol particle trapping and manipulation. Its capabilities enable real-time analysis of single aerosol particle dynamics, presenting an adaptable, user-friendly framework for comprehensively understanding aerosol processes that drive both climate dynamics and critical industrial applications. Initially, the thesis formulates a theoretical framework for the interaction between light and optically trapped aerosols. By evaluating the size range of trapped aerosols within the CP dual fiber trap under varying dual fiber separations, the study yields consistent, quantifiable outcomes for aerosol trapping in the CP dual fiber setup. Subsequently, the investigation delves into the repercussions of angular deviations on the dynamics of trapped individual aerosol particles. The study quantifies trapping feasibility under different misalignment scenarios and examines how factors like beam divergence, fiber separation, fiber power, and aerosol radius influence the trapping performance and dynamic behavior of individual aerosol particles within tilted CP dual fiber traps. These findings contribute insights into the evolution of optical fiber-based traps, along with a novel strategy for controlling light-induced rotation in air. Moreover, the thesis elucidates non-spherical particle dynamics within CP dual fiber traps across three distinct trapping schemes. By introducing a novel model, it offers enhanced comprehension of droplet trapping dynamics within CP dual fiber traps, facilitating exploration of challenging-to-obtain parameters for experimental validation in the future. Furthermore, the integration of beam shaping techniques into CP dual fiber traps is advanced to enhance stability in trapping individual aerosol particles. The findings pave the way for beam shaping-assisted CP dual beam traps to improve the single aerosol trappings stability for arbitrary aerosol undergoing dynamic processes.	en_US.UTF-8
dc.format	Thesis (PhD)
dc.language.iso	en_US	en_US.UTF-8
dc.relation	https://opus.lib.uts.edu.au/bitstream/10453/173563/1/thesis.pdf
dc.rights	info:eu-repo/semantics/openAccess
dc.rights	The author owns the copyright in this thesis including all reproduction and reuse rights for the work. The work may not be altered without the permission of the copyright owner. Attribution is essential when quoting or paraphrasing from this thesis.
dc.rights	© 2023 Ling Zhang
dc.rights	au.edu.uts.lib/cph
dc.title	Fiber-Based Single Aerosol Optical Trapping and Manipulations	en_US.UTF-8
dc.type	Thesis
utslib.copyright.status	open_access	*

Abstract:

Aerosols, comprising dispersed solid or liquid particles in gases, serve diverse functions with substantial economic implications. From everyday items like air fresheners and asthma inhalers to extensive emissions from industrial sources and vehicles, aerosols have far-reaching effects, causing local and global pollution, which poses health risks. Additionally, they wield a profound influence on our climate system, contributing to atmospheric processes that regulate planetary temperatures and curb unchecked warming. Studying and isolating single aerosol processes is, however, still in its infant phase. Many processes at the single aerosol level are still not yet fully understood. This thesis endeavours to establish an advanced platform for trapping individual aerosol particles, utilizing fiber-based optical traps. Through the synergy of counter-propagating (CP) dual fiber trapping techniques and sophisticated beam shaping algorithms, this platform transcends conventional constraints in single aerosol particle trapping and manipulation. Its capabilities enable real-time analysis of single aerosol particle dynamics, presenting an adaptable, user-friendly framework for comprehensively understanding aerosol processes that drive both climate dynamics and critical industrial applications. Initially, the thesis formulates a theoretical framework for the interaction between light and optically trapped aerosols. By evaluating the size range of trapped aerosols within the CP dual fiber trap under varying dual fiber separations, the study yields consistent, quantifiable outcomes for aerosol trapping in the CP dual fiber setup. Subsequently, the investigation delves into the repercussions of angular deviations on the dynamics of trapped individual aerosol particles. The study quantifies trapping feasibility under different misalignment scenarios and examines how factors like beam divergence, fiber separation, fiber power, and aerosol radius influence the trapping performance and dynamic behavior of individual aerosol particles within tilted CP dual fiber traps. These findings contribute insights into the evolution of optical fiber-based traps, along with a novel strategy for controlling light-induced rotation in air. Moreover, the thesis elucidates non-spherical particle dynamics within CP dual fiber traps across three distinct trapping schemes. By introducing a novel model, it offers enhanced comprehension of droplet trapping dynamics within CP dual fiber traps, facilitating exploration of challenging-to-obtain parameters for experimental validation in the future. Furthermore, the integration of beam shaping techniques into CP dual fiber traps is advanced to enhance stability in trapping individual aerosol particles. The findings pave the way for beam shaping-assisted CP dual beam traps to improve the single aerosol trappings stability for arbitrary aerosol undergoing dynamic processes.

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