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Physics Letters A

All-optical modulation based on electromagnetically induced transparency

Antonios Fountoulakis, Andreas Terzis, Emmanuel Paspalakis

Published Jun 10, 2010• 25 citations
Publisher
DOI
10.1016/j.physleta.2010.06.006

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A three-level EIT (electromagnetically induced transparency) vapor is used to manipulate the transparency and absorption properties of the probe light in a waveguide. The most remarkable feature of the present scheme is such that the optical responses resulting from both electromagnetically induced transparency and large spontaneous emission enhancement are very sensitive to the frequency detunings of the probe light as well as to the small changes of the waveguide dimension. The potential applications of the dimension- and dispersion-sensitive EIT responses are discussed, and the sensitivity limits of some waveguide-based sensors, including electric absorption modulator, optical switch, wavelength sensor, and sensitive magnetometer, are analyzed.