Efficient microwave-induced optical frequency conversion
Institut für Experimentalphysik, Technische Universität Graz, 8010 Graz, Austria
Revised: 6 March 2000
Published online: 15 September 2000
Frequency conversion process is studied in a medium of atoms with a Λ configuration of levels, where transition between two lower states is driven by a microwave field. In this system, conversion efficiency can be very high by virtue of the effect of electromagnetically induced transparency (EIT). Depending on intensity of the microwave field, two regimes of EIT are realized: "dark-state"EIT for the weak field, and Autler-Townes-type EIT for the strong one. We study both cases via analytical and numerical solution and find optimum conditions for the conversion.
PACS: 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light / 42.65.Ky – Harmonic generation, frequency conversion
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000