High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state

This project studies the two-frequency photoassociation process of molecules with a weakly bound halo state in a high-intensity regime. In the two-frequency photoassociation experiment of 86Sr performed by Aman et. al., where 86Sr atoms are coupled to the weakly bound halo state in the ground ele...

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Main Author: Kon, Wen Yu
Other Authors: Kaden Hazzard
Format: Final Year Project
Language:English
Published: 2019
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Online Access:http://hdl.handle.net/10356/76878
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-768782023-02-28T23:13:18Z High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state Kon, Wen Yu Kaden Hazzard Tomasz Paterek School of Physical and Mathematical Sciences DRNTU::Science::Physics::Optics and light This project studies the two-frequency photoassociation process of molecules with a weakly bound halo state in a high-intensity regime. In the two-frequency photoassociation experiment of 86Sr performed by Aman et. al., where 86Sr atoms are coupled to the weakly bound halo state in the ground electronic channel, additional features are observed in the high-intensity regime. These features include higher order peaks and strong ac Stark shifts experienced by the spectral peaks. A simple three-level model with a two-frequency drive on each leg of the transition is introduced and is shown to capture the higher order peaks and their positions accurately. By using Floquet and perturbation theory, a simple formula is developed that replicates the binding energy of the halo state accurately. The threelevel model developed here will be a useful guide for future explorations in twofrequency photoassociation. In addition, a scheme using the weakly bound halo state and strong ac Stark shift observed in the 86Sr photoassociation experiment to tune the halo state into resonance is proposed. The proposed scheme is advantageous over typical optical Feshbach resonance in tuning scattering length due to its lower atom loss rate. This makes scattering length tuning using lasers more feasible. Bachelor of Science in Physics 2019-04-20T11:39:57Z 2019-04-20T11:39:57Z 2019 Final Year Project (FYP) http://hdl.handle.net/10356/76878 en 67 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Science::Physics::Optics and light
spellingShingle DRNTU::Science::Physics::Optics and light
Kon, Wen Yu
High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state
description This project studies the two-frequency photoassociation process of molecules with a weakly bound halo state in a high-intensity regime. In the two-frequency photoassociation experiment of 86Sr performed by Aman et. al., where 86Sr atoms are coupled to the weakly bound halo state in the ground electronic channel, additional features are observed in the high-intensity regime. These features include higher order peaks and strong ac Stark shifts experienced by the spectral peaks. A simple three-level model with a two-frequency drive on each leg of the transition is introduced and is shown to capture the higher order peaks and their positions accurately. By using Floquet and perturbation theory, a simple formula is developed that replicates the binding energy of the halo state accurately. The threelevel model developed here will be a useful guide for future explorations in twofrequency photoassociation. In addition, a scheme using the weakly bound halo state and strong ac Stark shift observed in the 86Sr photoassociation experiment to tune the halo state into resonance is proposed. The proposed scheme is advantageous over typical optical Feshbach resonance in tuning scattering length due to its lower atom loss rate. This makes scattering length tuning using lasers more feasible.
author2 Kaden Hazzard
author_facet Kaden Hazzard
Kon, Wen Yu
format Final Year Project
author Kon, Wen Yu
author_sort Kon, Wen Yu
title High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state
title_short High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state
title_full High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state
title_fullStr High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state
title_full_unstemmed High-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state
title_sort high-intensity two-frequency photoassociation spectroscopy of a weakly bound molecular state
publishDate 2019
url http://hdl.handle.net/10356/76878
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