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Supporting data: Thesis "Creation of Ultracold Polar Ground-State RbCs Molecules", Peter K. Molony, 2016 Open Access
This thesis reports the creation and trapping of 87RbCs molecules in the absolute ground state with a temperature of 1 uK. We build a tunable narrow-linewidth laser system at 1550 nm and 980 nm, using a single high-finesse optical cavity as a reference for both colours. We use fibre-coupled electro-optic modulators to continuously tune both lasers. These allow a novel measurement of the free spectral range of the cavity to better than 1 part in 10^6. We perform one- and two-photon spectroscopy on 87RbCs Feshbach molecules and identify a suitable intermediate state for transfer to the molecular ground state. We measure the electric dipole moment of the molecular ground state as 1.225(3)(8) D, and demonstrate the highest lab-frame dipole moment of any ultracold molecular system at the time of measurement. We transfer the molecules to the electronic, rovibrational and hyperfine ground state using stimulated Raman adiabatic passage, with 88% efficiency. We measure the transition strengths and excited state linewidth for this transfer route. We develop a model for the transfer which includes the effect of laser linewidth, and find excellent agreement with experimental data. The molecular sample is trapped in an optical dipole potential, and has a lifetime of 0.89(6) s. We reference the STIRAP lasers to a novel design of frequency comb which uses difference frequency generation to cancel the carrier-envelope offset. We use this to measure the binding energy of the molecules as h x 114 268 135.24(4)(3) MHz. To our knowledge, this is the most precise determination of the dissociation energy of a molecule to date. Finally, we report progress toward loading the molecules into a 1D optical lattice at 1064 nm. We develop the tools and methods to characterise a lattice, and demonstrate trapping of Feshbach molecules in both a 1D optical lattice and a harmonic optical potential at 1064 nm.
Descriptions
- Resource type
- Dataset
- Contributors
- Creator:
Molony, Peter K.
1
Contact person: Molony, Peter K. 1
1 Durham University, UK
- Funder
-
Engineering and Physical Sciences Research Council
- Research methods
- Other description
- Keyword
- RbCs
Molecules
Ultracold
Polar
Binding energy
Rubidium
Cesium
- Subject
-
Physics
- Location
-
Durham
- Language
- English
- Cited in
- http://etheses.dur.ac.uk/11781/
- Identifier
- ark:/32150/r2gx41mh85n
doi:10.15128/r2gx41mh85n
- Rights
- All rights reserved All rights reserved
- Publisher
-
Durham University
- Date Created
File Details
- Depositor
- P.K. Molony
- Date Uploaded
- 28 July 2016, 15:07:58
- Date Modified
- 4 May 2017, 09:05:47
- Audit Status
- Audits have not yet been run on this file.
- Characterization
-
File format: zip (ZIP Format)
Mime type: application/zip
File size: 9322282
Last modified: 2016:07:28 16:26:02+01:00
Filename: PKM Thesis - Supporting Data.zip
Original checksum: 2e9dad3dbde67e51ae6c83e5996476bc
User Activity | Date |
---|---|
User P.K. Molony has updated Supporting data: Thesis "Creation of Ultracold Polar Ground-State RbCs Molecules", Peter K. Molony, 2016 | almost 8 years ago |
User S. Palucha has updated Supporting data: Thesis Peter K Molony | about 8 years ago |
User S. Palucha has updated Supporting data: Thesis Peter K Molony | about 8 years ago |
User S. Palucha has updated Supporting data: Thesis Peter K Molony | about 8 years ago |