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We demonstrate the application of optoelectronically generated terahertz electromagnetic transients to real-time detection of coherent oscillations by free electrons in modulation doped semiconductor heterostructures, due to the cyclotron resonance. The damping of these oscillations gives a direct measure of the electron dephasing which can be compared with scattering rates obtained from dc transport measurements.
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Some et al. (1994) studied this question.
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