IGARSS'97. 1997 IEEE International Geoscience and Remote Sensing Symposium Proceedings. Remote Sensing - A Scientific Vision for Sustainable Development, 1997
... N. Floury", G. Picard", T. Le Toan*, JA Kong**, T. Castel***, A. Beaudoin***, JF Ba... more ... N. Floury", G. Picard", T. Le Toan*, JA Kong**, T. Castel***, A. Beaudoin***, JF Barczi**** * CESBIO, 18 avenue Edouard Belin, bpi 2801,314100 Toulouse cedex. ... Fig. 2 : Evolution with age of cylin C) Linear density D) Branching angle I 0 . M M 8 65-- 9 75-a E . D ...
Ultraviolet (UV) photodetectors based on ZnO nanostructure/graphene (Gr) hybrid-channel field-eff... more Ultraviolet (UV) photodetectors based on ZnO nanostructure/graphene (Gr) hybrid-channel field-effect transistors (FETs) are investigated under illumination at various incident photon intensities and wavelengths. The time-dependent behaviors of hybrid-channel FETs reveal a high sensitivity and selectivity toward the near-UV region at the wavelength of 365 nm. The devices can operate at low voltage and show excellent selectivity, high responsivity (RI ), and high photoconductive gain (G). The change in the transfer characteristics of hybrid-channel FETs under UV light illumination allows to detect both photovoltage and photocurrent. The shift of the Dirac point (V Dirac ) observed during UV exposure leads to a clearer explanation of the response mechanism and carrier transport properties of Gr, and this phenomenon permits the calculation of electron concentration per UV power density transferred from ZnO nanorods and ZnO nanoparticles to Gr, which is 9 × 10(10) and 4 × 10(10) per mW, respectively. The maximum values of RI and G infer from the fitted curves of RI and G versus UV intensity are 3 × 10(5) A W(-1) and 10(6) , respectively. Therefore, the hybrid-channel FETs studied herein can be used as UV sensing devices with high performance and low power consumption, opening up new opportunities for future optoelectronic devices.
IEEE Transactions on Geoscience and Remote Sensing, 2003
AbstractThe objective of this paper is to quantify the impact of the type of surface-profiling i... more AbstractThe objective of this paper is to quantify the impact of the type of surface-profiling instrument on the roughness measurements in radar remote sensing studies. Particularly, the use of mechanical profilers as compared to more precise laser profilers is investigated. The motivations for ...
IEEE Transactions on Geoscience and Remote Sensing, 1992
... Branching Model for Vegetation Simon H. Yueh, JA Kong, Fellow, IEEE, Jen King Jao, Member, IE... more ... Branching Model for Vegetation Simon H. Yueh, JA Kong, Fellow, IEEE, Jen King Jao, Member, IEEE, Robert T. Shin, Senior Member, IEEE, and Thuy Le Toan ... T. Le Toan is with the Centre d'Etude Saptiale des Rayonnements, CNRS, 31400 Toulouse Cedex, France. ...
IEEE Transactions on Geoscience and Remote Sensing, 1992
... Relating forest biomass to SAR data Le Toan, T. Beaudoin, A. Riom, J. Guyon, D. Centre d'... more ... Relating forest biomass to SAR data Le Toan, T. Beaudoin, A. Riom, J. Guyon, D. Centre d'Etude Spatiale des Rayonnements, CNRS, Univ. Paul Sabatier, Toulouse; ...
IEEE Transactions on Geoscience and Remote Sensing, 1997
Page 1. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 35, NO. 1, JANUARY 1997 41 Rice ... more Page 1. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 35, NO. 1, JANUARY 1997 41 Rice Crop Mapping and Monitoring Using ERS-1 Data Based on Experiment and Modeling Results Thuy Le Toan ...
IGARSS'97. 1997 IEEE International Geoscience and Remote Sensing Symposium Proceedings. Remote Sensing - A Scientific Vision for Sustainable Development, 1997
... N. Floury", G. Picard", T. Le Toan*, JA Kong**, T. Castel***, A. Beaudoin***, JF Ba... more ... N. Floury", G. Picard", T. Le Toan*, JA Kong**, T. Castel***, A. Beaudoin***, JF Barczi**** * CESBIO, 18 avenue Edouard Belin, bpi 2801,314100 Toulouse cedex. ... Fig. 2 : Evolution with age of cylin C) Linear density D) Branching angle I 0 . M M 8 65-- 9 75-a E . D ...
Ultraviolet (UV) photodetectors based on ZnO nanostructure/graphene (Gr) hybrid-channel field-eff... more Ultraviolet (UV) photodetectors based on ZnO nanostructure/graphene (Gr) hybrid-channel field-effect transistors (FETs) are investigated under illumination at various incident photon intensities and wavelengths. The time-dependent behaviors of hybrid-channel FETs reveal a high sensitivity and selectivity toward the near-UV region at the wavelength of 365 nm. The devices can operate at low voltage and show excellent selectivity, high responsivity (RI ), and high photoconductive gain (G). The change in the transfer characteristics of hybrid-channel FETs under UV light illumination allows to detect both photovoltage and photocurrent. The shift of the Dirac point (V Dirac ) observed during UV exposure leads to a clearer explanation of the response mechanism and carrier transport properties of Gr, and this phenomenon permits the calculation of electron concentration per UV power density transferred from ZnO nanorods and ZnO nanoparticles to Gr, which is 9 × 10(10) and 4 × 10(10) per mW, respectively. The maximum values of RI and G infer from the fitted curves of RI and G versus UV intensity are 3 × 10(5) A W(-1) and 10(6) , respectively. Therefore, the hybrid-channel FETs studied herein can be used as UV sensing devices with high performance and low power consumption, opening up new opportunities for future optoelectronic devices.
IEEE Transactions on Geoscience and Remote Sensing, 2003
AbstractThe objective of this paper is to quantify the impact of the type of surface-profiling i... more AbstractThe objective of this paper is to quantify the impact of the type of surface-profiling instrument on the roughness measurements in radar remote sensing studies. Particularly, the use of mechanical profilers as compared to more precise laser profilers is investigated. The motivations for ...
IEEE Transactions on Geoscience and Remote Sensing, 1992
... Branching Model for Vegetation Simon H. Yueh, JA Kong, Fellow, IEEE, Jen King Jao, Member, IE... more ... Branching Model for Vegetation Simon H. Yueh, JA Kong, Fellow, IEEE, Jen King Jao, Member, IEEE, Robert T. Shin, Senior Member, IEEE, and Thuy Le Toan ... T. Le Toan is with the Centre d'Etude Saptiale des Rayonnements, CNRS, 31400 Toulouse Cedex, France. ...
IEEE Transactions on Geoscience and Remote Sensing, 1992
... Relating forest biomass to SAR data Le Toan, T. Beaudoin, A. Riom, J. Guyon, D. Centre d'... more ... Relating forest biomass to SAR data Le Toan, T. Beaudoin, A. Riom, J. Guyon, D. Centre d'Etude Spatiale des Rayonnements, CNRS, Univ. Paul Sabatier, Toulouse; ...
IEEE Transactions on Geoscience and Remote Sensing, 1997
Page 1. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 35, NO. 1, JANUARY 1997 41 Rice ... more Page 1. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 35, NO. 1, JANUARY 1997 41 Rice Crop Mapping and Monitoring Using ERS-1 Data Based on Experiment and Modeling Results Thuy Le Toan ...
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