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1. Single-trap optical tweezer
I discuss here the detailed protocol on how to build a single-trap optical tweezer. I built the single-trap optical tweezer at Takeuchi Lab at the University of Tokyo.
OpticalTweezer_Operation.pdfTraped-2.avi2. Holographic optical tweezer
The video shows the jiggling polystyrene microbeads that are suspended in a fluid. These microbeads are trapped in an array of laser optical traps.
The optical traps used here was generated using the spatial light modulator (SLM) based optical tweezer, named, holographic optical tweezer. I constructed this SLM based holographic optical tweezer at the IBS Center for Soft and Living Matter, Ulsan, South Korea. The holography pattern (here its array of dots) is programmable and one can generate the hologram digitally. Here I used MATLAB to generate the holgoram (details in github link).
PS: The video was taken by me at IBS Center for Soft and Living Matter, Ulsan, South Korea.
References/codes:
Implementation of Gerchberg Saxton Algorithm: Phase Retrieval Algorithm for Designing Holographic Optical Tweezer, Hisay Lama, Git-Hub (2020). [Short article]
Fourier Optics: MATLAB codes for generating phase masks, Hisay Lama, Git-Hub (2020).
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