Transient photocurrents in photoconductive semiconductors generated by step-phase modulations.
Transient photocurrents generated in photoconductive semiconductors by two coherently interfering optical fields in two-wave mixing experiments were observed when the signal beam was phase modulated by a step signal. Expressions describing the behavior of the transient photocurrent were derived and verified experimentally. Such transient photocurrents are insensitive to the static carrier phase differences between the two optical fields and can be used to detect sudden phase variations between two interfering optical fields.
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Davidson
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Wang
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Trivedi