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Influence of the injection current sweep rate on the polarization switching of vertical-cavity surface-emitting lasers
(American Institute of Physics, 2006-12)
We study the polarization switching of vertical-cavity surface-emitting lasers based on simulations of the spin-flip model. We show that the switching point depends on the ramp signal used to scan the injected current. ...
A Switched-Diode Topology for Cascaded Multilevel Converters with Reduced Number of Switches
(Institute of Electrical and Electronics Engineers Inc., 2022)
In medium-voltage applications, the main issue with multilevel converters is that they require a large number of semiconductor switches when higher voltage levels are required. The main objective of this paper is to propose ...
Transporte electrónico en silicio poroso nanoestructurado
(2013-03-25)
En este trabajo se fabricaron dispositivos basados en silicio poroso nanoestructurado, con el fin de estudiar y caracterizar sus propiedades de transporte eléctrico, buscando acumular datos que permitan en un futuro ...
All-optical switching device for infrared based on PbTe quantum dots
(ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD, 2008)
Multilayers of PbTe quantum dots embedded in SiO2 were fabricated by alternate use of Pulsed Laser Deposition (PLD) and Plasma Enhanced Chemical Vapor Deposition (PECVD) techniques. The morphological properties of the ...
Dimmable electronic ballast with high power-factor SEPIC preregulator, for multiple tubular fluorescent lamps
(2004-11-29)
An electronic ballast for multiple tubular fluorescent lamps is presented in this paper. The proposed structure features high power-factor, dimming capability, and soft-switching to the semiconductor devices operated in ...
Zero-Current Switching (ZCS) for a High Step Ratio Modular Multilevel dc-dc Converter with wide voltage range operation
(IEEE, 2020)
The rise of new dc technologies is pushing the development of highly efficient dc-dc converters, especially at high voltage and high step ratio. Modular multilevel converters (MMCs) are an attractive alternative because ...