Pump/Probe Angular Dependence of Hanle Electromagnetically Induced Transparency

We investigate the dependence of Hanle Electromagnetically Induced Transparency (EIT) on angular separation between pump and probe field propagation directions in room-temperature Rb vapor. We observe the FWHM of the probe transmission spectrum and the amplitude of the EIT signal while varying the angular separation from 0 to 1 milliradian. Following the work of M. Shuker, O. Firstenberg, R. Pugatch, A. Ben-Kish, A. Ron, and N. Davidson, Phys. Rev. A 76, 023813 (2007), we examine potential applications in information storage and retrieval.