Browsing by Author "Christofides, Constantinos"
Now showing items 21-40 of 137
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Article
Electronic Transport Investigation of Arsenic-Implanted Silicon .1. Annealing Influence on the Transport-Coefficients
Christofides, Constantinos; JAOUEN, H.; GHIBAUDO, G. (1989)
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Article
Electronic transport investigation of arsenic-implanted silicon. II. Annealing kinetics of defects
Christofides, Constantinos; Ghibaudo, G.; Jaouen, H. (1989)A study of the effects of the annealing temperature and time on arsenic-implanted silicon films is reported. ac and dc Hall-effect measurements as a function of temperature and frequency have been employed to characterize ...
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Article
Electronic Transport Investigations on Silicon Damaged by Arsenic Ion-Implantation
JAOUEN, H.; GHIBAUDO, G.; Christofides, Constantinos (1986)
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Doctoral Thesis
Etude des propriétés de transport dans des couches de silicium désordonnées par implantation ionique à forte dose : influence du recuit thermique
Christofides, Constantinos (ANRT, 1986)DES MESURES D'EFFET HALL EN FONCTION DE LA TEMPERATURE ET DE LA FREQUENCE. EFFET DE LA TEMPERATURE DE RECUIT SUR LES COEFFICIENTS DE TRANSPORT ELECTRONIQUE. LES MECANISMES DE COLLISION SONT MODIFIES POUR DES TEMPERATURES ...
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Conference Object
Exploring HPC parallelism with data-driven multithreating
Christofides, Constantinos; Michael, G.; Trancoso, Pedro; Evripidou, Paraskevas (IEEE Computer Society, 2013)The switch to Multi-core systems has ended the reliance on the single processor for increase in performance and moved into Parallelism. However, the exponential growth in performance of the single processor in the 80's and ...
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Article
Fine art painting characterization by spectroscopic ellipsometry: Preliminary measurements on varnish layers
Christofides, Constantinos; Castellon, B.; Othonos, Andreas S.; Polikreti, Kyriaki; De Deyne, C. (2004)The long-term conservation of the original state of paintings requires high quality multi-spectral digital image technologies. CRISATEL Program addresses fine art professionals as primary end-users base. The analysis by ...
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Article
Finite thickness and semi-infinite photothermal radiometric models for the characterization of semiconductors
Karmiotis, Y.; Nestoros, Marios; Christofides, Constantinos (1998)A comparative computational study of the finite thickness and semi-infinite photothermal radiometric model is carried out for silicon, germanium, and gallium arsenide. The sensitivity of the photothermal radiometric finite ...
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Article
Foreword
Christofides, Constantinos; Ghibaudo, G. (1997)
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Article
FULLSPECTRUM: a new PV wave making more efficient use of the solar spectrum
Luque, A.; Marti, A.; Bett, A.; Andreev, VM; Jaussaud, C.; van Roosmalen, JAM; Alonso, J.; Rauber, A.; Strobl, G.; Stolz, W.; Algora, C.; Bitnar, B.; Gombert, A.; Stanley, C.; Wahnon, P.; Conesa, JC; van Sark, WGJHM; Meijerink, A.; van Klink, GPM; Barnham, K.; Danz, R.; Meyer, T.; Luque-Heredia, I.; Kenny, R.; Christofides, Constantinos; Sala, G.; Benitez, P. (2005)The project FULLSPECTRUM - an Integrated Project (IP) in the terminology of the European Commission - pursues a better exploitation of the FULL solar SPECTRUM by (1) further developing concepts already scientifically proven ...
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Article
Hall Effect and Resistance Measurements on Implanted and Annealed Silicon Layers
Christofides, Constantinos (1990)Abstract A study of the effects of the annealing temperature on arsenic implanted silicon layer (at high dose and energy) is reported. Hall effect and resistance measurements, at room temperature (300 K) have been employed ...
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Article
High-temperature photomodulated thermoreflectance measurements on phosphorus implanted and annealed silicon wafers
Othonos, Andreas S.; Christofides, Constantinos; Loizidou, Efi (2003)Photomodulated thermoreflectance measurements between 300 and 650 K on phosphorus implanted and annealed silicon wafers are reported. The change of the photothermal amplitude and phase as a function of temperature is ...
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Article
Hydrogen gas detection via photothermal deflection measurement
Kalli, Kyriacos; Othonos, Andreas S.; Christofides, Constantinos (1997)A study of a thermal wave hydrogen sensor interrogated via transverse optical beam deflection spectroscopy is presented. The sensor is a thin film polyvinylidene fluoride film coated with a thin palladium layer. The ...
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Article
Influence of temperature and modulation frequency on the thermal activation coupling term in laser photothermal theory
Christofides, Constantinos; Othonos, Andreas S.; Loizidou, Efi (2002)A quantitative analysis of the influence of temperature and modulation frequency on the thermal activation coupling term in laser photothermal theory is performed. Until now it was taken for granted that the coupling term ...
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Article
Infrared Real-Time-Normalized Photopyroelectric Measurements of Crystalline Germanium - Instrumentation and Spectroscopy
Christofides, Constantinos; Mandelis, Andreas; GHANDI, K.; WAGNER, RE (1990)
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Article
Infrared-Spectroscopy and Electrical Characterization of Phosphorus Implanted and Annealed Silicon Layers
Seas, Antonios; Eleftheriou, Maria-Elena; Christofides, Constantinos; Theocharis, Charis R. (1995)Fourier transform infrared spectroscopy has been carried out in the spectral range of 2.5 to 25 mu m, both in transmission and reflection mode on phosphorus-implanted, non-annealed and annealed silicon layers. Complementary ...
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Article
Instrumentation for the monitoring of toxic pollutants in water resources by means of neural network analysis of absorption and fluorescence spectra
Kuzniz, T.; Halot, D.; Mignani, A. G.; Ciaccheri, L.; Kalli, Kyriacos; Tur, M.; Othonos, Andreas S.; Christofides, Constantinos; Jackson, D. A. (2007)The concentration of several pollutants, usually present in industrial waste waters, is predicted by the neural network data processing of absorption and fluorescence measurements in the visible spectral range. Proper ...
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Article
Intщgration en technologie CMOS d’un modulateur plasmonique р ef-fet de champ
Gщrard GHIBAUDO; Jean-Claude WEEBER; Laurent VIVIEN; Christofides, Constantinos; Anatoly Zayats
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Article
Laser induced micro-photoluminescence of marble and application to authenticity testing of ancient objects
Polikreti, Kyriaki; Christofides, Constantinos (2008)For the last 70 years, the authenticity of disputable marble objects has been tested by using a black light lamp. According to empirical observations "fresh marbles are purple while ancient ones are blue under the lamp". ...
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Article
Laser photothermal diagnostics of genuine and counterfeit British and United States banknotes
Othonos, Andreas S.; Mandelis, Andreas; Nestoros, Marios; Christofides, Constantinos (1997)Laser-induced, frequency-scanned IR photothermal radiometry was used to investigate the thermophysical properties of the paper on which several genuine and counterfeit British (pound 10) and U.S. ($50, $100) currency bills ...
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Article
Laser-induced photothermal reflectance investigation of silicon damaged by arsenic ion implantation: A temperature study
Vitkin, I. A.; Christofides, Constantinos; Mandelis, Andreas (1989)Laser-induced photothermal reflectance (PTR) measurements of arsenic-implanted silicon are reported. The photothermal signals as a function of temperature are presented for both annealed and as-implanted silicon films. The ...