Counter-propagating intracavity optical tweezers
| dc.contributor | Graduate Program in Physics. | |
| dc.contributor.advisor | Elahi, Parviz. | |
| dc.contributor.author | Ay, Aysu. | |
| dc.date.accessioned | 2025-04-14T12:43:33Z | |
| dc.date.available | 2025-04-14T12:43:33Z | |
| dc.date.issued | 2023 | |
| dc.description.abstract | Optical tweezers are a powerful tool that utilizes optical forces generated by the exchange of momentum between light and matter to trap and manipulate a wide range of particles, including atoms and molecules, organelles, proteins,and cells. Since intracavity optical trapping was introduced, a new research opportunity opened for three-dimensional optical trapping of microscopic objects using a low numerical aperture lens at low laser intensity. This method has introduced the placing of the trapping optics within a fiber laser ring cavity and the forces of optical feedback radiation. There are two possible configurations for intracavity optical trapping: single-beam and counter-propagating beam configurations. The former has already been proposed and implemented, while the latter still needs to be discussed in detail: the focus of this work lies on counter-propagating beam configuration. This work demonstrates the design, implementation, and experimentation of counter- propagating optical tweezers. It presents 3D trapping of 1.98 μm-diameter polystyrene particles, which single-beam intracavity traps were incapable of performing. The total average power on the sample was measured to be 885 μW, which corresponds to an average intensity of 21.2 μWμm−2. The inversely correlated counter-propagating beams reduce the average intensity on the particle in the trap; hence, they enable the trapping of light-sensitive biological matter. This paves the way for new and exciting applications for optical tweezers. | |
| dc.format.pages | xiv, 53 leaves | |
| dc.identifier.other | Graduate Program in Physics. TKL 2023 U68 PhD (Thes BM 2023 A63 | |
| dc.identifier.uri | https://digitalarchive.library.bogazici.edu.tr/handle/123456789/21560 | |
| dc.publisher | Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2023. | |
| dc.subject.lcsh | Optical tweezers. | |
| dc.title | Counter-propagating intracavity optical tweezers |
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