The effect of electromagnetically induced transparency in magnetoactive high-temperature plasmas

We investigate a classical analogue of electromagnetically induced transparency (BIT) currently popular in quantum electronics. We consider BIT for electron cyclotron waves in a finite-temperature plasma. We derive an expression for the effective refractive index of an electromagnetic wave and study the dispersion and absorption of this wave under EIT conditions. Allowance for thermal motion is shown to change radically the behaviour of the dispersion curves for the probe wave in the BIT region compared with the case of a cold plasma. The influence of possible parametric instability on the EIT effect is discussed.