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Chapter
Radioprotezione nel laboratorio di produzione dei radiofarmaci
Lo scopo principale della radioprotezione negli ambienti di lavoro è il raggiungimento e il successivo mantenimento di un livello di sicurezza accettabile e di condizioni lavorative soddisfacenti.
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Article
Self-pulsing localized structures in a laser with saturable absorber
We consider a broad area heterostructured semiconductor laser with an integrated saturable absorber in a monolithic configuration. We extend beyond the single-longitudinal mode approximation a model already u...
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Article
Spontaneously moving solitons in a cavity soliton laser with circular section
We show that in a cavity soliton laser based on a VCSEL with a saturable absorber the solitons can spontaneously move if the ratio of the carrier lifetimes in the amplifier and in the absorber takes appropria...
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Chapter
Cavity Solitons in Semiconductor Devices
Cavity solitons represent a class of dissipative solitons which are generated inside an optical resonator. They have attracted considerable interest in the recent years due to their possible application to opt...
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Article
Cavity soliton laser based on VCSEL with saturable absorber
We study theoretically a broad-area vertical cavity surface emitting laser (VCSEL) with a saturable absorber. We show numerically the presence of cavity solitons in the system: they exist as solitary structure...
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Article
Model for optical pattern and cavity soliton formation in a microresonator with self-assembled semiconductor quantum dots
We have developed a model that describes the optical response of a semiconductor quantum dot medium in a cavity in order to investigate pattern and cavity solitons formation. This model, beyond the inclusion o...
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Article
Spatial decorrelation in broad-area edge-emitting semiconductor amplifiers
We analyze experimentally the spatio-temporal dynamics of the transverse structures appearing in broad area edge-emitting semiconductor amplifiers under CW optical injection. We demonstrate that, in certain co...
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Article
Microprocessor-controlled optical stimulating device to improve the gait of patients with Parkinson's disease
Different types of visual cue for subjects with Parkinson's disease (PD) produced an improvement in gait and helped some of them prevent or overcome freezing episodes. The paper describes a portable gait-enabl...
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Chapter and Conference Paper
A Proposed Framework for Multinational Comparative Risk Analysis: Pesticide Use, Impacts and Management
Comparative risk assessment is a natural tool for decision making regarding transboundary environmental issues. A workgroup of environmental experts met during the NATO Workshop over three days and addressed t...
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Article
First principle theory for cavity solitons in semiconductor microresonators
Cavity solitons are similar to spatial solitons, appearing as localized bright dots in the transverse intensity profile of the electromagnetic field, but they arise in dissipative systems. In this paper we con...
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Chapter
Cavity Spatial Solitons in Semiconductor Microcavities
In the framework of Transverse Nonlinear Optics and Optical Pattern Formation, we study the formation of cavity solitons (CS) in semiconductor microcavities. We adopt a microscopic model that describes the fie...
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Article
Effects of Ion Metal Plasma (IMP) Titanium Deposition on Ti Silicide Formation
Titanium disilicide obtained by direct interaction between Si and a deposited Ti layer is a choice for low- resistance gate interconnections and source and drain areas. The properties of the TiSi2 film can be inf...
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Article
Signal amplification by means of cavity solitons in semiconductor microcavities
Cavity solitons were recently predicted in semiconductor microresonators grown with a vertical geometry. By exploiting a previously introduced model valid for both passive and active configurations of a multip...
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Article
Evaluating the Denuded Zone Depth by Measurements of the Recombination Activity of Bulk Defects
A method for measuring denuded zone depth from lifetime measurements is proposed and compared to observations by microscopy techniques and to Electron Beam Induced Current (EBIC) analyses. The surface photovol...
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Chapter
Laser-Based Optical Associative Memories
A new approach to architecture based on the use of a laser as a nonlinear discriminator for all-optical, auto- and hetero-associative memories is presented. The laser operates in a regime of spatial multistabi...
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Chapter
Localized Structures In Nonlinear Optical Systems And Materials
Diffractive effects in passive nonlinear optical resonators can lead to pattern forming bifurcations with subcritical character. When the pattern (in our case, a regular hexagonal lattice of inte...
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Chapter and Conference Paper
Instabilities and pattern formation in a Laser with Injected Signal
In the last years, diffractive effects coupled to medium nonlinearity in nonlinear optical systems were increasingly investigated as the main means of pattern formation and spatio-temporal dynamics in optics [1].
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Article
Quantum and classical effects in non-linear optical patterns
We discuss spontaneous pattern formation in the radiation field emitted by a degenerate optical parametric oscillator and illustrate various quantum effects in these patterns. Above threshold, we find the pres...
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Chapter
Laser-Based Optical Associative Memories
A new approach to architecture based on the use of a laser as a nonlinear discriminator for all-optical, auto- and hetero-associative memories is presented. The laser operates in a regime of spatial multistabi...
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Article
Pattern formation in lasers
