Temporal instabilities in single-grating photorefractive four-wave mixing clickable element to
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A novel transient-grating geometry, which is nondegenerate, copropagating, phase
matched, and polarization sensitive, is used to isolate and measure independently the …

Clear observations of photoreflectance (PR) spectra due to excitonic transitions in semi-
insulating GaAs bulk materials are reported. The modulation mechanism is attributed to the …

The transient behavior of photorefractive gratings in the polymer composite poly (N-vinyl
carbazole)(PVK), 2, 4, 7-trinitro-9-fluorenone (TNF), and N, N-diethyl-para-nitroaniline …

The phase dependence of the photoreflectance signal in the region of the E 0 transitions in
GaAs samples has been investigated using the two-channel lock-in technique. The spectral …

We have studied the time constants involved in photoreflectance from several GaAs surface‐
intrinsic‐n+ structures. The rise and fall times were determined from digital oscilloscope …

Photoreflectance (PR) spectroscopy experiments are reported on GaAsSb∕ InP
heterostructures. The GaAsSb PR spectrum is studied as a function of temperature and the …

The theory for two-wave mixing in a photorefractive material with an external electric field
and a moving grating is developed. Large gain enhancements are predicted for grating …

A microscopic model of the non-steady-state photoelectromotive force excited by a vibrating
interference pattern in a bipolar photoconductor under an external dc electric field is …

Multigrating operation of degenerate four-wave mixing in photorefractive media is
considered in the strong pump regime. Closed-form expressions for the reflectivity are …