Narrow absorptive resonances in a four-level atomic system

Bason, MG; Mohapatra, AK; Weatherill, KJ; Adams, CS

doi:10.1088/0953-4075/42/7/075503

Narrow absorptive resonances in a four-level atomic system

Bason, MG; Mohapatra, AK; Weatherill, KJ; Adams, CS

Authors

MG Bason

AK Mohapatra

Professor Kevin Weatherill k.j.weatherill@durham.ac.uk
Professor

Professor Stuart Adams c.s.adams@durham.ac.uk
Professor

Abstract

We study the effect of a control beam on a Λ electromagnetically induced transparency (EIT) system in 87Rb. The control beam couples one ground state to another excited state forming a four-level -system. Phase coherent laser beams to drive the -system are produced using a double injection locking scheme. We show that the control beam can be used to Stark shift or split the EIT resonance. Finally, we show that, when the control beam is on resonance, one observes a Doppler-free and sub-natural absorptive resonance with a width of order 100 kHz. Crucially, this narrow absorptive resonance only occurs when atoms with a range of velocities are present, as is the case in a room-temperature vapour.

Citation

Bason, M., Mohapatra, A., Weatherill, K., & Adams, C. (2009). Narrow absorptive resonances in a four-level atomic system. Journal of Physics B: Atomic, Molecular and Optical Physics, 42(7), https://doi.org/10.1088/0953-4075/42/7/075503

Journal Article Type	Article
Publication Date	Jan 1, 2009
Deposit Date	Sep 24, 2010
Publicly Available Date	Oct 6, 2010
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
Print ISSN	0953-4075
Electronic ISSN	1361-6455
Publisher	IOP Publishing
Peer Reviewed	Not Peer Reviewed
Volume	42
Issue	7
DOI	https://doi.org/10.1088/0953-4075/42/7/075503
Publisher URL	http://iopscience.iop.org/0953-4075/42/7/075503