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Updated: May 24, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
Published on: December 3, 2013
Four-wave-mixing between the upper excited states in a ladder-type atomic configuration
Utsab Khadka1, Huaibin Zheng, Min Xiao
1Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA. ukhadka@uark.edu
Abstract:
Four-wave-mixing (FWM) radiation is generated between the hyperfine structures of the 5D and 5P states in a thermally broadened rubidium atomic vapor using resonant atomic coherence. Background-free unidirectional signals having narrow spectral linewidths are isolated and experimentally studied in the frequency domain, and the effects of the driving beam parameters on the properties of the radiation are discussed. The radiation has several new properties compared to traditional FWM radiations generated between the 5P and 5S states. The high-resolution signals obtained in this method could make it favorable in spectroscopic procedures that rely on two-photon fluorescence.
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