Heteronuclear colisions in a dipole trap

Author(s)

Bruno Spolon Marangoni

• Document type: Doctoral Thesis
• Press: São Carlos.
• Institution: Universidade de São Paulo (USP). Instituto de Física de São Carlos (IFSC/BT)
• Defense date: 2013-04-04

Examining board members

Luis Gustavo Marcassa; Daniel Felinto Pires Barbosa; Leonardo De Boni; Miled Hassan Youssef Moussa; Fernando Jorge da Paixão Filho

• Advisor: Luis Gustavo Marcassa

Abstract

In this paper, we present an experimental setup to simultaneously trap atoms of K and Rb in a crossed optical dipole trap. This accomplishment required the individual study of each atomic species during the project development. This allowed the development of a new technique for loading a dipole trap directly from a magneto-optical trap of 39K, providing evidence of the importance of the hyperfine structure of the state 4P3/2 in the loading process. We also observe and explain the photoassociation process of Rb2 due to the dipole trap laser at 1071 nm, including an isotopic difference between 85Rb and 87Rb. In the sequence, we performed dual species loading of K and Rb and observed the photoassociation process of KRb. A simple theoretical model predicts the final distribution of vibrational levels obtained. The same model provides a potential path to optically pump the molecules and accumulate them in the molecular ground state X1Σ+ (v = 0) for KRb. (AU)

• FAPESP's process: 08/09618-9 - KRb molecules in the vibrational ground state
• Grantee: Bruno Spolon Marangoni
• Support Opportunities: Scholarships in Brazil - Doctorate