Results 71 to 80 of about 5,749 (159)
Tendencias actuales y perspectivas de las comunicaciones ópticas [PDF]
, 1988 A short review to the main problems today in optical Communications is given. Several topics, namely, coherent optical systems, high-speed transmission systems, optical switching, fluoride glasses and wavelength division multiplexing are studied.
Martín Pereda, José Antonio
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Graduate studies on optoelectronics in Argentina: an experience [PDF]
, 2014 The number of graduate programs in Optoelectronics in Argentina is scarce. The current Optics and Photonics Education Directory lists only three programs.
Fernández, Juan Carlos +4 more
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Advanced Optical Materials, Volume 13, Issue 8, March 13, 2025.This study reveals the potential to manipulate spin‐valley polarization dynamics in MoSe2/WSe2 heterostructures by quantifying different scattering processes following selective photoexcitation. The results show that these heterostructures enable ultrafast valley‐selective charge transfer, with phonon scattering playing a significant role in the ...
Julian Wagner +9 more
wiley +1 more source
La comunicación de los próximos años [PDF]
, 1997 En este artículo se recogen diversas tecnologías que pueden facilitar la comunicación en un futuro, como son las fibras ópticas dopadas con tierras raras, los resonadores no lineales de Fabry-Perot o los dispositivos semiconductores basados en pozos ...
Martín Pereda, José Antonio
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Reference values for cerebral and peripheral tissue oximetry in children: A clinical TD‐NIRS study
Acta Paediatrica, Volume 114, Issue 3, Page 515-525, March 2025.Abstract Aim Current non‐invasive near‐infrared spectroscopy (NIRS) tissue oximetry suffers from suboptimal reproducibility over probe repositioning, hindering clinical threshold establishment. Time Domain‐NIRS (TD‐NIRS) offers higher precision but lacks sufficient paediatric data, preventing effective clinical application.
Valeria Calcaterra +8 more
wiley +1 more source
Mechanism of Hot‐Carrier Photoluminescence in Sn‐Based Perovskites
Advanced Materials, Volume 37, Issue 5, February 5, 2025.Schematic illustrating the two dominant processes in tin‐iodide perovskites at the band edge: 1) Filling of carriers at the band edge extrema as they cool. 2) Cooling of carriers emitting a longitudinal optical (LO) phonon. The inset shows the dephasing of a longitudinal optical phonon studied by impulsive vibrational spectroscopy in this work ...
Eelco K. Tekelenburg +7 more
wiley +1 more source
Sistema Óptico de Encriptación de Doble Máscara de Fase bajo Arquitectura 4f
TecnoLógicas, 2010 Nowadays the area of optical encryption of information concentrates the efforts of many researchers in laboratories around the world, mainly because contributions presented in the last two decades have shown the reliability, versatility and applicability
Carlos A. Ríos +2 more
doaj
Chemistry – A European Journal, Volume 31, Issue 5, January 22, 2025.New 2D black phosphorus (bP)–phthalocyanine nanohybrids were prepared by liquid phase exfoliation of bP crystals with phthalocyanine (Pc) and Mn phthalocyanine (MnPc). Spectroscopic analyses revealed the development of heterostructures due to the interaction of bP with the aromatic and heteroaromatic rings of Pc, as well as coordinative bonds between P
Doriana Scittarelli +9 more
wiley +1 more source
High-order harmonic generation from ultrafast matter Talbot effect [PDF]
EPJ Web of ConferencesHigh-order harmonic spectroscopy is a robust method for probing electron dynamics under the influence of a driving field, capturing phenomena as brief as attoseconds.
Plaja Luis +2 more
doaj +1 more source
Comunicaciones ópticas: Situación y perspectivas [PDF]
, 1989 En este artículo se plantean dos de los temas más controvertidos actualmente en Comunicaciones Opticas, como son el de la Conmutación Fotónica y los Amplificadores de Fibra Óptica.
Martín Pereda, José Antonio
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