Europhysics Letters (EPL)

Phase-sensitive microwave optical double resonance in an N system

T. M. Preethi, M. Manukumara, K. Asha, J. Vijay, D. Anish Roshi, Andal Narayanan

Published Jul 15, 2011• 14 citations

Abstract

\n An experimental investigation of a Microwave Optical Double Resonance (MODR) phenomenon is carried out in a four level N system of 85Rb atoms, at room temperature. This N system consists of a closed three level Λ subsystem irradiated with two optical fields and one microwave field. The MODR response is investigated in a separate probe field which drives a resonant transition from one of the ground states of the Λ system to a fourth level. We find that, under two-photon resonance condition for the optical fields, the MODR becomes a function of the relative phase between the beat frequency envelop of the optical fields and the microwave field. The variation in MODR is shown to be correlated with the phase-sensitive variation of the EIT phenomenon seen in such microwave-connected closed Λ systems. We envisage that this phase-sensitive variation in the MODR, can be utilized for a phase-sensitive manipulation of non-linear optical phenomena in N systems.\n

DOI: 10.1209/0295-5075/95/34005

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