Event Details
Optical Trapping and Raman Spectroscopy of Nanoparticles Using Nano Apertures In Reflection Mode
Presenter: Behnam Khosravi
Supervisor:
Date: Sat, January 6, 2024
Time: 12:00:00 - 00:00:00
Place: Zoom, link below.
ABSTRACT
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Meeting ID: 815 9260 8162
Password: 026136
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Summary:
In this presentation, we explore 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. 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, FDTD 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.