Novel methods for optical trapping and raman spectroscopy of nanoparticles

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dc.contributor.authorKhosravi, Behnam
dc.contributor.supervisorGordon, Reuven
dc.date.accessioned2025-04-29T21:01:03Z
dc.date.available2025-04-29T21:01:03Z
dc.date.issued2025
dc.degree.departmentDepartment of Electrical and Computer Engineering
dc.degree.levelDoctor of Philosophy PhD
dc.description.abstractThis dissertation explores advanced novel techniques in optical trapping and Raman spectroscopy, focusing on the utilization of double-nanohole (DNH) apertures. We investigate polarization selective reflection mode optical trapping, which enhances the precision and efficiency of nanoparticle manipulation compared to conventional transmission mode optical trapping. These studies investigated Raman spectroscopy with DNH trapping, demonstrating significant Raman signal enhancement due to the intense electric fields generated within the DNH gaps. This enhancement is quantified through Raman signal enhancement by using DNHs and providing insights into the mechanisms driving this phenomenon. Additionally, we present methodologies for observing trapping in real-time using the camera in optical tweezer systems, enabling direct visualization and analysis of the trapping event. Complementary to the experimental work, DNH simulations are conducted to model the optical and plasmonic properties of the DNH structures. These simulations offered a theoretical framework that supports and explains the experimental findings. The integration of these techniques not only advances the field of optical trapping and Raman spectroscopy but also creates new opportunities for applications in nanotechnology and materials science.
dc.description.scholarlevelGraduate
dc.identifier.urihttps://hdl.handle.net/1828/22046
dc.languageEnglisheng
dc.language.isoen
dc.rightsAvailable to the World Wide Web
dc.subjectOptical tweezers
dc.subjectRaman spectroscopy
dc.subjectNanoparticles
dc.titleNovel methods for optical trapping and raman spectroscopy of nanoparticles
dc.typeThesis

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