Apr 06, 2017 4:00 pm - Nielsen Hall 170 - Colloquium
Luis Marcassa - University of Sao Paulo
Photoassociation, vibrational cooling and trapping of Rb2 by a single high-power light beam

Photoassociation of a pair of ultracold atoms is a quite simple and rapid approach for cold molecule formation. It relies on the absorption of a single photon, mostly at large internuclear distance in a classical view, towards an excited electronic molecular state followed by radiative relaxation down to the electronic ground state. The main limitation of PA is that the latter step is incoherent, so that the population of the created molecules is spread over many vibrational levels with weak or moderate binding energies. If the excited electronic molecular state exhibits a peculiar feature at short internuclear distance like a potential barrier or an avoided crossing, the population of deeply-bound ground state levels may be significantly enhanced. In this work, we use a single high power light beam to photoassociate rubidium molecules in a MOT. The same light beam vibrational cool the molecules, producing v=0 molecules, which can be trapped by the same light beam in a molecular optical dipole trap.



Postcards from the Universe

Jul 19, 2018 7:00 pm

Sam Noble Museum of Natural History - Dr. Nate Kaib
The Solar System's Adolescent Years

Postcards from the Universe

Aug 16, 2018 7:00 pm

Sam Noble Museum of Natural History - Dr. John Wisniewski
The Search for Habitable Planets


Aug 23, 2018 4:00 pm

Nielsen Hall 170 - No Colloquium
1st week of Classes