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Chapter
The Electron-Hole Plasma in Quasi Two-Dimensional and Three-Dimensional Semiconductors
We investigate under quasi-stationary excitation conditions the electron-hole plasma in CdS, CdSe, GaAs and GaAs/AlGaAs multiple quantum wells. The experimental technique is the pump-and-probe beam spectroscop...
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Chapter
Excitonic Optical Nonlinearities in Semiconductor Quantum Wells
In this article we review our experimental and theoretical investigations of the nonlinear optical processes seen at room temperature in GaAs quantum well structures photoexcited close to the fundamental absor...
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Chapter
Opto-Electronics in Semiconductors Quantum Wells Structures: Physics and Applications
In recent years the development of lightwave communication systems has driven an extensive research in the field of opto-electronics. The capability of optical fibers to carry extremely high bit rates, larger ...
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Chapter and Conference Paper
Dynamics of Below-Gap Photoexcitation in GaAs Quantum Wells
Time-resolved transmission experiments in GaAs quantum wells show that photoexcitation in the transparent region of the heterostructure can produce a striking variety of excitonic effects.
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Chapter and Conference Paper
Optical Reading of InGaAs Modulation Doped Field Effect Transistor
We present the first observation of absorption quenching in a semiconductor quantum well by electrical control of the carrier density. We have observed this novel effect at room temperature in a single modulat...
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Chapter and Conference Paper
Quantum-Confined Stark Effect in InGaAs/InP Quantum Wells Grown by Metal-Organic Chemical Vapor Deposition
Large shifts of absorption spectrum in InGaAs/InP multiple quantum wells with applied electric fields are reported. Applications for light modulators are discussed.
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Chapter
Quantum Well Structures for Optical Signal Processing
Large and well resolved excitonic resonances are observed at room temperature in the absorption spectra of GaAs/AlGaAs and GalnAs/AlInAs quantum well structures. They arise from the enhancement of excitonic ef...
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Chapter and Conference Paper
Nonlinear Optics and Electro-Optics of Quantum Wells
Of particular interest for applications to optical signal processing are the mechanisms by which electrostatic or optical fields are used to change the refractive index or the absorption coefficient of a medium.
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Chapter and Conference Paper
Nonlinear Interactions and Excitonic Effects in Semiconductor Quantum Wells
The optimization of the nonlinear optical response of solids is a key element in the development of future optical switching and signal processing systems. Demonstrations of device feasibility have been obtain...
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Chapter and Conference Paper
Band Mixing in GaAs-(AlGa)As Heterostructures
We report an investigation of the polarization of optical emission that probes the character of the highest valence subband ho of GaAs-(AlGa)As quantum well heterostructures. The results reveal that for small in ...
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Chapter and Conference Paper
Novel Selection Rules in Resonant Raman Scattering from GaAs Quantum Wells
Raman scattering resonant with quasi-two dimensional excitons in GaAs-AlGaAs quantum well heterostructures has revealed optical vibrations and electron-phonon interactions significantly different from those in...
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Chapter
Room Temperature Optical Nonlinear Absorption and Refraction in GaAs Multiple Quantum Wells
A brief review is given of the nonlinear optical properties of room-temperature GaAs multiple quantum wells. These materials show very large nonlinear absorption and refraction near their exciton resonances. F...
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Chapter and Conference Paper
Femtosecond Dynamics of Nonequilibrium Correlated Electron-Hole Pair Distributions in Room-Temperature GaAs Multiple Quantum Well Structures
The GaAs multiple quantum well structure (MQWS) is a new and unique nonlinear optical material [1]. The reduced dimensionality of the electron-hole system in the ultra-thin (100 Å) layers gives rise to clear e...
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Article
Dynamical NL optics, bistability
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Chapter
Investigations on the Biexcitons by Optical Resonant Degenerate Mixing
A previously described method of active nonlinear spectroscopy, applied to CuCl, has very clearly displayed a quite general peculiarity of the biexciton states in semiconductors: their autoionizing character. ...
