BOLD

New developments on diamond photodetector for VUV Solar Observations

Boris Giordanengo — 2008-02-19T10:42:27Z

A. BenMoussa, A. Soltani, K. Haenen, U. Kroth, V. Mortet, H.A. Barkad, D. Bolsee, C. Hermans, M. Richter, J.C. De Jaeger , J.F. Hochedez.
Semiconductor Science and Technology, 23, 035026 (2008) - Publications

193 nm deep-ultraviolet solar-blind cubic boron nitride based photodetectors

Boris Giordanengo — 2008-01-21T13:57:37Z

A. Soltani, H.A. Barkad, M. Mattalah, B. Benbakhti, J.-C. De Jaeger, Y. M. Chong, Y. S. Zou, W. J. Zhang, S.T. Lee, A. BenMoussa, B. Giordanengo, J.-F. Hochedez.
Appl. Phys. Lett., 92, 053501 (2008) - Publications

Characterization of AlN metal-semiconductor-metal diodes in the spectral range 44-360 nm: Photoemission assessments

Boris Giordanengo — 2008-01-21T13:57:35Z

A. BenMoussa, J.F. Hochedez, R. Dahal, J. Li, J. Y. Lin, H. X. Jiang, A. Soltani and J.-C. De Jaeger, U. Kroth and M. Richter.
Appl. Phys. Lett. 92, 22108 (2008) - Publications

AlxGa1-xN focal plane arrays for imaging applications in the extreme ultraviolet (EUV) wavelength range

Boris Giordanengo — 2008-01-21T13:57:33Z

J. John, P. Malinowski, A. Lorenz, G. Hellings, K. Cheng, M. Germain, F. Semond, J-Y Duboz, A. BenMoussa, J.-F. Hochedez, U. Koth and M. Richter.
Proc SPIE, 6585, 658505 (2007) - Publications

LAPIN - Lyman Alpha PIN photodetectors for space applications

Boris Giordanengo — 2007-02-27T09:53:13Z

The spectral line at 1216 Å corresponds to the Lyman-alpha radiation named after American physicist Theodore Lyman, this is the transition of an electron between the two lowest energy levels of a hydrogen atom. The Ly-alpha line is the most fundamental transition of the most abundant atom in the universe. As such, the line is a valuable diagnostic for many purposes. (e.g Ly-alpha line emission is an efficient tool for identifying young galaxies). For the Sun, brightening of Ly-alpha radiation may indicate an increase in solar radiation reaching Earth (most impact on Earth and heliosphere). It allows studying all features typical of the solar lower atmosphere such as the network, spicules, cold loops, filaments etc.

On the other hand, since the solar radiant flux is very small at Ly-alpha, there is a general need in solar missions for large size (area), solarblind and highly VUV sensitive photodiodes. For the direct detection with high sensitivity, new photodiodes must be built from other materials than silicon, and different materials have to be used for VUV and X-ray sensors, than for infrared devices (e.g LYRA and Premos projects).

The technological purpose of this activity (in collaboration with IMO and IEMN) is to fabricate a large PIN diamond photodiodes with a sharp diamond band edge around 225 nm with a visible rejection ratio (200 versus 500 nm) of more than five orders of magnitude. LAPIN diamond photodiode should prove their general suitability for space applications. The requirements are radiation hardness, solar-blindness, high sensitivity and fast response, good uniformity, good linearity and dynamic range, temperature and long term stability, and low intrinsic dark current and noise. Diamond photodiodes have high potential to reach all these specifications and to surpass existing technology.

Future Diamond UV Imagers For Solar Physics

Jean-FranÃ§ois Hochedez — 2007-01-17T18:19:46Z

Hochedez, J.-F.; Verwichte, E.; Bergonzo, P.; Guizard, B.; Mer, C.; Tromson, D.; Sacchi, M.; Dhez, P.; Hainaut, O.; Lemaire, P.; Vial, J.-C.
Physica Status Solidi (A), Volume 181, Issue 1, p.141-149, 2000

Wide bandgap EUV and VUV imagers for the Solar Orbiter

Jean-FranÃ§ois Hochedez — 2007-01-17T17:49:11Z

Hochedez, Jean-François; Lemaire, Philippe; Pace, Emanuele; Schühle, Udo; Verwichte, Erwin In: Solar encounter. Proceedings of the First Solar Orbiter Workshop, 14 - 18 May 2001, Puerto de la Cruz, Tenerife, Spain. Eds.: B. Battrick & H. Sawaya-Lacoste, Scientific coordinators: E. Marsch, V. Marinez Pillet, B. Fleck & R. Marsden.
ESA SP-493, Noordwijk: ESA Publications Division, ISBN 92-9092-803-4, 2001, p. 245 - (...) - Publications

Assessment of GaN metal-semiconductor-metal photodiodes for high-energy ultraviolet photodetection

Jean-FranÃ§ois Hochedez — 2007-01-17T17:46:25Z

Monroy, E.; Palacios, T.; Hainaut, O.; Omnès, F.; Calle, F.; Hochedez, J.-F. Applied Physics Letters, Volume 80, Issue 17, pp. 3198-3200 (2002) - Publications

New UV detectors for solar observations

Jean-FranÃ§ois Hochedez — 2007-01-17T17:44:42Z

Hochedez, Jean-Francois E.; Schuehle, Udo H.; Pau, Jose L.; Alvarez, Jose; Hainaut, Olivier; Appourchaux, Thierry P.; Auret, F. D.; Belsky, Andrei; Bergonzo, Philippe; Castex, M. C.; Deneuville, A.; Dhez, Pierre; Fleck, Bernhard; Haenen, Ken; Idir, Mourad; Kleider, Jean Paul; Lefeuvre, Elie; Lemaire, Philippe; Monroy, E.; Muret, P.; Munoz, Elias; Nesladek, Milos; Omnes, Franck; Pace, Emanuele; Peacock, Anthony J.; Van Hoof, Chris A. Innovative Telescopes and Instrumentation for Solar Astrophysics. Edited by Stephen L. Keil, Sergey V. Avakyan.
Proceedings of the SPIE, Volume 4853, pp. 419-426 (2003).

Development of imaging arrays for solar UV observations based on wide band gap materials

Jean-FranÃ§ois Hochedez — 2007-01-17T17:36:10Z

Schuehle, Udo H.; Hochedez, Jean-Francois E.; Pau, Jose Luis; Rivera, Carlos; Munoz, Elias; Alvarez, Jose; Kleider, Jean-Paul; Lemaire, Philippe; Appourchaux, Thierry; Fleck, Bernhard; Peacock, Anthony; Richter, Mathias; Kroth, Udo; Gottwald, Alexander; Castex, Marie-Claude; Deneuville, Alain; Muret, Pierre; Nesladek, Milos; Omnes, Franck; John, Joachim; Van Hoof, Chris.
Telescopes and Instrumentation for Solar Astrophysics. Edited by Fineschi, Silvano; Gummin, Mark A. Proceedings of the (...) - Publications