title: Oscillatory mode coupling and electrically strobed gratings in photorefractive quantum-well diodes.
abstract: Oscillatory mode coupling between two coherent laser beams is produced when an interference pattern moves against a quasi-static electrically strobed grating in a photorefractive AlGaAs/GaAs multiple-quantum-well diode operated in the quantum-confined Stark geometry. The oscillation frequency is equal to the frequency difference between the two laser beams and provides a method to measure high-frequency Doppler shifts or large surface displacements for laser-based ultrasound. Combined photorefractive gains (normally forbidden by symmetry in the Stark geometry) and absorptive gains approach 1200cm(-1)during two-wave mixing using moving gratings.
authors: I
authors: I
authors: Lahiri
authors: D D
authors: DD
authors: Nolte
authors: M R
authors: MR
authors: Melloch
authors: M B
authors: MB
authors: Klein