SjoerdRoorda

Refereed Publications and Conference Proceedings 1987 - 2010

Some links are still missing in action.

• Click here for recent publications

• P. Dagenais, L. J. Lewis, and S. Roorda, Understanding subtle changes in medium-range order in amorphous silicon, J. of Phys.-Cond. Matt.27, 295801 (2015) pdf
• B. Tomberli, A. Rahemtulla, E. Kim, S. Roorda, and S. Kycia, Germanene-like defects in amorphous germanium revealed by three-dimensional visualization of high-resolution pair-distribution functions Phys. Rev. B, 92, 064204 (2015) pdf
• P. Dagenais,L.J. Lewis, and S. Roorda, Dominant structural defects in amorphous silicon, J. of Phys.-Cond. Matt.34, 345004 (2015) pdf

• M. Chicoine, B. Thiebaut, and S. Roorda, Further improved technique for channeled stopping power measurements, Nucl. Instr. Meth. B 332, 290 (2014). pdf
• O. Diop and S. Roorda, Upper limit on room-temperature diffusion of metal impurities interstitially dissolved in amorphous Si, Can. J. Phys. 92, 22 (2014). pdf

• S. Kahwaji, R. A. Gordon, E. D. Crozier, S. Roorda, M. D. Robertson, J. Zhu, and T. L. Monchesky , Surfactant-mediated growth of ferromagnetic Mn delta-doped Si, PHYSICAL REVIEW B 88, 174419 (2013). pdf
• R. Xie, G.G. Long, S.J. Weigand, S.C. Moss, T. Carvalho, S. Roorda, M. Hejna, S. Torquato, and P.J. Steinhardt, Hyperuniformity in amorphous silicon based on the measurement of the infinite-wavelength limit of the structure factor, PNAS, 110, 13250 (2013). pdf
• G. Éthier-Majcher, P. St-Jean, A. Bergeron, A.-L. Phaneuf-L’Heureux, S. Roorda, and S. Francoeur, Photoluminescence from single nitrogen isoelectronic centers in gallium phosphide produced by ion implantation, J. Appl. Phys. 114, 034307 (2013). pdf
• C. Harkati Kerboua, J.-M. Lamarre, M. Chicoine, L. Martinu, and S. Roorda, Elongation of gold nanoparticles by swift heavy ion irradiation: Surface plasmon resonance shift dependence on the electronic stopping power, Thin Solid Films, 527, 186 (2013). pdf
• X. Cauchy and S. Roorda, Towards a regular array of single swift heavy ion impact sites, Application of Accelerators in Research and Industry Book Series: AIP Conference Proceedings 1525, 375 (2013). pdf

• S. Roorda and L.J. Lewis, Comment on “The Local Structure of Amorphous Silicon", Science 338, 1539 (2012). pdf
• S. Roorda, C. Martin, M. Droui, M. Chicoine, A. Kazimirov, and S. Kycia, Disentangling neighbors and extended range density oscillations in monatomic amorphous semiconductors, Phys. Rev. Lett. 108 255501 (2012). (funding: NSERC, FQRNT) pdf
• Y. Hou, J. R. Liu, M. Buchanan, A.J. Spring Thorpe, P.J. Poole, H.C. Liu, Ke Wu, Sjoerd Roorda, X.P. Zhang, Terahertz generation using implanted InGaAs photomixers and multi-wavelength quantum dot lasers, Nano-Micro Lett. 4, 10-13 (2012). (funding: NSERC, FQRNT) pdf

• C. Harkati Kerboua, M. Chicoine, S. Roorda, Gold nanoparticles resist deformation by swift heavy ion irradiation when embedded in a crystalline matrix, Nucl. Instr. and Meth. B269, 2006 (2011). (funding: NSERC, FQRNT) pdf
• R. Xie, G.G. Long, S.J. Weigand, S.C. Moss, and S. Roorda, Order and disorder in edge-supported pure amorphous Si and pure amorphous Si on Si(001), J. Non-Cryst. Sol., 357, 2498 (2011). (funding: NSERC, FQRNT) pdf

• C. Capan, G. Seyfarth, D. Hurt, B. Prevost, S. Roorda, A. D. Bianchi and Z. Fisk, Wilson ratio in Yb-substituted CeCoIn5, Eur. Phys. Lett., 92, 47004 (2010). (funding: NSERC, FQRNT) pdf
• S. Roorda and Y. Lavigueur, Solid phase epitaxial growth of amorphous silicon is not affected by structural relaxation, Phil. Mag. 90, 3787 (2010). (funding: NSERC, FQRNT) pdf
• I.G. Bucsa, R. W. Cochrane, and S. Roorda, Structural morphology and Mn distribution in annealed InP co-implanted with P and Mn, J. Appl. Phys. 107, 073912 (2010). (funding: NSERC, FQRNT) pdf

• P. Baril, L.J. Lewis, and S. Roorda, A numerical study of energy transfer mechanisms in materials following irradiation by swift heavy ions, Eur. Phys. J. B 71, 27 (2009). (funding: NSERC, FQRNT) pdf
• I.G. Bucsa, R. W. Cochrane, and S. Roorda, Segregation and formation of MnP particles during rapid thermal annealing of Mn-implanted InP and GaP, J. Appl. Phys. 106, 013914 (2009). (funding: NSERC, FQRNT) pdf
• M. Guihard, P. Turcotte-Tremblay, S. Gaudet, C. Coïa, S. Roorda, P. Desjardins, C. Lavoie, and F. Schiettekatte, Controlling nickel silicide phase formation by Si implantation damage, Nucl. Instr. and Meth. B267, 1285 (2009). (funding: NSERC, FQRNT) pdf

• X. Urli, C.L. Dias, L.J. Lewis, and S. Roorda, Point defects in pure amorphous silicon and their role in structural relaxation: A tight-binding molecular-dynamics study, Phys. Rev. B 77, 155204 (2008). (funding: NSERC, FQRNT) pdf
• J.-M. Lamarre, F. Billard, C. Harkati Kerboua, M. Lequime, Sjoerd Roorda, and L. Martinu, Anisotropic nonlinear optical absorption of gold nanorods in a silica matrix, Optics Communications 281 331 (2008). (funding: NSERC, FQRNT, France-Québec exchange program) pdf

• C. Harkati Kerboua, J.M. Lamarre, L. Martinu, and S. Roorda, Deformation, alignment and anisotropic optical properties of gold nanoparticles embedded in silica, Nucl. Instr. and Meth. B257, 24 (2007). (funding: NSERC, FQRNT) pdf

• J. Raymond, C. Mounayer, I. Salazkin, A. Metcalfe, G. Gevry, C. Janicki, S. Roorda, and P. Leblanc, Safety and effectiveness of radioactive coil embolization of aneurysms - Effects of radiation on recanalization, clot organization, neointima formation, and surrounding nerves in experimental models, Stroke 37, 2147 (2006). (funding: NSERC, FQRNT, CIHR) pdf
• J.J. Penninkhof, T. van Dillen, S. Roorda, C. Graf, A. van Blaaderen, A.M. Vredenberg, and A. Polman, Anisotropic deformation of metallo-dielectric core-shell colloids under MeV ion irradiation, Nucl. Instr. and Meth. B242, 523 (2006). (funding: NSERC, FQRNT, NWO) pdf
• T.S. Rao, M.G. So, W.Y. Jiang, T. Mayer, S. Roorda, S.C. Gujrathi, M.L.W. Thewalt, C.R. Bolognesi, S.P. Watkins, Optical and electrical characterization of OMVPE-grown AlGaAsSb epitaxial layers on InP substrates, J. Cryst. Growth 287, 532 (2006). (funding: NSERC, FQRNT) pdf
• M. Zaezjev, M. Chandra Sekhar, M. Ferrera, L. Razzari, G. G. Ross, B. M. Holmes, M. Sorel, D. C. Hutchings, S. Roorda, and R. Morandotti, Magnetooptic iron garnet thin films for integrated optical applications, Proc. SPIE 6343, 63433W (2006). (funding: NSERC, FQRNT) pdf
• P. Leblanc, J. Raymond, and S. Roorda, Ion-implantation and characterization of P-32-radioactive platinum coils for endovascular treatment of intracranial aneurysms, Nucl. Instr. and Meth. B242, 173 (2006). (funding: NSERC, FQRNT, CIHR) pdf

• J.F. Mercure, R. Karmouch, Y. Anahory, S. Roorda, and F. Schiettekatte, Dependence of the structural relaxation of amorphous silicon on implantation temperature, Phys. Rev. B 71, 134205 (2005). pdf
• J.M. Lamarre, Z. Yu, C. Harkati, S. Roorda, and L. Martinu, Optical and microstructural properties of nanocomposite Au/SiO₂ films containing particles deformed by heavy ion irradiation, Thin Solid Films 479, 232 (2005). pdf
• M. Chicoine, C. Beaudoin, S. Roorda, R.A. Masut, and P. Desjardins, III-V compliant substrates implemented by nanocavities introduced by ion implantation, J. Appl. Phys. 97, 064309 (2005). pdf
• V. Ramaswamy, T.E. Haynes, C.W. White, W.J. MoberlyChan, S. Roorda, M.J. Aziz, Synthesis of nearly monodisperse embedded nanoparticles by separating nucleation and growth in ion implantation, Nano Letters 5, 373 (2005). pdf

• T. van Dillen, M.J.A. de Dood, J.J. Penninkhof, A. Polman, S. Roorda, and A.M. Vredenberg, Ion beam-induced anisotropic plastic deformation of silicon microstructures. Appl. Phys. Lett. 84, 3591 (2004). pdf
• F. Schiettekatte, M. Chicoine, J.S. Forster, J.S. Geiger, S. Gujrathi, R. Kolarova, A. Paradis, S. Roorda, P. Wei, ERD, N-15 external beam for NRRA in air, HIRBS: ion beam analysis developments on the HVEC EN-1 Tandem. Nucl. Instr. and Meth. B219-220, 430 (2004). pdf
• M. Cai, T. Veres, S. Roorda, F. Schiettekatte and R. W. Cochrane, Ion-beam irradiation of Co/Cu nanostructures:Effects on GMR and magnetic properties, J. Appl. Phys. 95, 2006 (2004). pdf
• M. Cai, T. Veres, S. Roorda, F. Schiettekatte and R. W. Cochrane, Structural evolution of Co/Cu nanostructures under 1 MeV ion-beam irradiation, J. Appl. Phys. 95, 1996 (2004). pdf
• S. Roorda, T. van Dillen, A. Polman, C. Graf, A. van Blaaderen, and B.J. Kooi, Aligned gold nanorods in silica made by ion irradiation of core-shell colloidal particles, Adv. Mat. 16, 235 (2004). pdf
• O. Tousignant, J. Raymond, P. Leblanc, S. Roorda, C. Janicki, Fabrication and characterization of beta activated coils for improving treatment of cerebral aneurysms, Medical Physics 31, 1888 (2004). nopdf
• P. Leblanc, S. Roorda, J. Raymond, C. Janicki, A. Weill, D. Roy, F. Guilbert, L. Normandeau, Endovascular treatment of intracranial aneurysms with radioactive coils: Initial clinical experience, Medical Physics 31, 1884 (2004). nopdf
• C. Janicki, P. Leblanc, S. Roorda, J. Raymond, O. Tousignant, Dosimetry of p-32 coated Guglielmi detachable coils for endovascular treatment of intracranial aneurysms, Medical Physics 31, 1881 (2004). nopdf

• J. Raymond, P. Leblanc, A. Lambert, S.A. Georganos, F. Guilbert, D. Roy, A. Weill, C. Janicki, S. Roorda, Radioactive embolization of intracranial aneurysms using P-32-implanted coils, Rivista di Neuroradiologia 16, 1159 (2003). pdf
• J. Raymond, Ph. Leblanc, F. Morel, I. Salazkin, G. Gevry, and S. Roorda, Beta radiation and inhibition of recanalization after coil embolization of canine arteries and experimental aneurysms - How should radiation be delivered?, Stroke 34, 1262 (2003). pdf
• J. Raymond, Ph. Leblanc, A. Lambert, A.G. Stavros, F. Guilbert, C. Janicki, and S. Roorda, Feasibility of radioactive embolization of intracranial aneurysms using 32P-implanted coils, Stroke 34, 1035 (2003). pdf
• R. Poirier, V. Avalos, S. Dannefaer, F. Schiettekatte, and S. Roorda, Divacancies in proton irradiated silicon: Comparison of annealing mechanisms studied with infrared spectroscopy and positron annihilation, Nucl. Instr. and Meth. B 206, 85 (2003). pdf
• K. Awazu, S. Roorda, J.L. Brebner, S. Ishii, and K. Shima, Structure of latent tracks created by swift heavy ions in amorphous SiO₂ and zinc phosphate glass, Jap. J. Appl. Phys. Part I. 42 (6B), 3950 (2003). pdf
• J.-F. Mercure, R Karmouch, Y. Anahory , S. Roorda, F. Schiettekatte, Radiation damage in silicon studied in situ by nanocalorimetry, Physica B, 340, 622 (2003). pdf
• M. Chicoine, S. Roorda R.A. Masut and P. Desjardins, Nanocavities in He implanted InP, J. Appl. Phys. 94, 6116, (2003). pdf
• J. Raymond, D. Roy, Ph. Leblanc, S. Roorda, C. Janicki, F. Morel, G. Chevry, J.-P. Bahary, M. Chagnon, F. Guilbert, and A. Weill, Endovascular treatment of intracranial aneurysms with radio-active coils: initial clinical experience, Stroke 34 2801 (2003). pdf
• S. Roorda, Comment on “Quantitative analysis of annealing-induced structure disordering in ion-implanted amorphous silion”, by Ju-Yin Cheng et al., J. Vacuum Science and Technology A 20, 1855 (2002)., J. Vac. Sc. and Techn. A21, 827 (2003). pdf
• J. Raymond, P. Leblanc, C. Janicki, F. Guilbert, A. Weill, D. Roy, I. Salazkin, G. Gevry, V. Lebel, A. Metcalfe, O. Robledo, S. Roorda, Radioactive coil embolisation of intracranial aneurysms - Experimental and preliminary clinical data, Interventional Neuroradiology 9 77-82 Suppl. 2, (2003). pdf

• J. Raymond, Ph. Leblanc, A.-C. Desfaits, I. Salazkin, F. Morel, C. Janicki, and S. Roorda, In situ radiation to prevent recanalization after coil embolization of cerebral aneurysms, Stroke 33, 421 (2002). pdf
• A.L. Tchebotareva, J.L. Brebner, S. Roorda, P. Desjardins, and C.W. White, Structural properties of InAs nanocrystals formed by sequential implantation of In and As ions in the Si(100) matrix, Journal of Applied Physics 92, 4664 (2002). pdf

• R. Poirier, S. Roorda, F. Schiettekatte, M. Lalancette and J. Zikovsky, Divacancies in proton irradiated silicon: characterization and annealing mechanisms, Physica B: Condensed Matter, 308-310, 462 (2001). pdf
• A.L. Tchebotareva, J.L. Brebner, S. Roorda, and C.W. White, Properties of InAs nanocrystals in silicon formed by sequential ion implantation, Nucl. Instr. and Meth. B 175-177, 187 (2001). pdf
• R. Héliou, J.L. Brebner, and S. Roorda, Role of implantation temperature on residual damage in ion implanted 6H-SiC, Semicond. Sci. Technol. 16, 836 (2001). pdf
• R. Héliou, J.L. Brebner, and S. Roorda, Optical and structural properties of 6H-SiC implanted with silicon as a function of implantation dose and temperature, Nucl. Instr. and Meth. B 175-177, 268 (2001). pdf
• T. Veres, M. Cai, R.W. Cochrane, M. Rouabhi, S. Roorda, and P. Desjardins, MeV Si+ irradiation of Ni/Fe multilayers : Structural, transport, and magnetic properties, Thin Solid Films 382, 172 (2001). pdf

• M. Fujimaki, Y. Nishihara, Y. Ohki, J.L. Brebner, and S. Roorda, Ion-implantation-induced densification in silica-based glass for fabrication of optical fiber gratings, J. Appl. Phys. 88, 5534 (2000). pdf
• F. Schiettekatte, S. Roorda, R. Poirier, M.O. Fortin, S. Chazal, and R. Héliou, Direct evidence for 8-interstitial-controlled nucleation of extended defects in c-Si, Appl. Phys. Lett, 77, 4322 (2000). pdf
• K. Awazu, S. Ishii, K. Shima, S. Roorda, and J.L. Brebner, Structure of latent tracks created by swift heavy ion bombardment of amorphous silica, Phys. Rev. B62, 3689 (2000). pdf
• M. Fujimaki, Y. Ohki, J.L. Brebner, and S. Roorda, Fabrication of long-period fiber gratings by use of ion implantation, Optics. Lett. 25, 88 (2000). pdf
• J. D’Arcy-Gall, P. Desjardins, I. Petrov, J.E. Greene, J.E. Paultre, R.A. Masut, S.C. Gujrathi, and S. Roorda, Epitaxial metastable Ge_1-yC_y (y < 0.02) alloys grown on Ge(001) from hyperthermal beams: C incorporation and lattice sites, J. Appl. Phys. 88, 96 (2000). pdf
• R. Poirier, F. Schiettekatte, S. Roorda and M.O. Fortin, Secondary defects engineering in c-Si: influence of implantation dose, temperature, and oxygen concentration, J. Vacuum Sci. and Techn. A 18, 717 (2000). pdf
• F. Schiettekatte, S. Roorda, R. Poirier, M.O. Fortin, S. Chazal, and R. Héliou, Dose and implantation temperature influence on extended defects nucleation in c-Si, Nucl. Instr. and Meth. B 164-165, 425 (2000). pdf
• T. Veres, M. Cai, S. Germain, M. Rouabhi, F. Schiettekatte, S. Roorda, and R.W. Cochrane, Ion-beam modification of Co/Ag multilayers II: Variation of structural and magnetic properties with Co layer thickness, J. Appl. Phys. 87, 8513 (2000). pdf
• J. Fick, E.J. Knystautas, A. Villeneuve, F. Schiettekatte, S. Roorda, and K.A. Richardson, Spectral properties of erbium-implanted chalcogenide channel waveguides, J. Non-Cryst. Solids 272, 200 (2000). pdf
• T. Veres, M. Cai, R.W. Cochrane, and S. Roorda, Ion-beam modification of Co/Ag multilayers I: Structural and magnetic properties of films with very thin Co layers, J. Appl. Phys. 87, 8504 (2000). pdf
• S. Roorda, Self-interstitials have never been observed in crystalline Si. How about amorphous silicon?, Mater. Res. Soc. Symp. Proc. A16.1, 1 (2000). pdf

• K. Laaziri, S. Kycia, S. Roorda, M. Chicoine, J.L. Robertson, J. Wang, and S.C. Moss, High-energy X-ray diffraction study of pure amorphous silicon, Phys. Rev. B 60, 13520 (1999). pdf
• P. Cottin, R.A. Lessard, E.J. Knystautas, and S. Roorda, Polymer waveguides under ion implantation: optical and chemical aspects, Nucl. Instr. and Meth.B 151, 97 (1999). pdf
• K. Laaziri, S. Kycia, S. Roorda, M. Chicoine, J.L. Robertson, J. Wang, and S.C. Moss, High resolution radial distribution function of pure amorphous silicon, Phys. Rev. Lett. 82, 3460 (1999). pdf
• F. Schiettekatte, C. Wintgens, and S. Roorda, Influence of curvature on impurity gettering by nanocavities in silicon, Appl. Phys. Lett, 74, 1857 (1999). pdf
• K. Laaziri, J.L. Robertson, S. Roorda, M. Chicoine, S. Kycia, J. Wang, and S.C. Moss, Quantitative treatment for extracting coherent elastic scattering from X-ray scattering experiments, J. Appl. Crystallography 32, 322 (1999). pdf
• A.L. Tchebotareva, J.L Brebner, S. Roorda, and J. Albert, Effect of proton implantation on the photosensitivity of SMF-28 optical fiber, Nucl. Instr. and Meth. B 148, 687 (1999). pdf
• S. Roorda, K. Laaziri, and S.C. Gujrathi, Edge supported amorphous silicon membranes for diffraction studies, Nucl. Instr. and Meth. B 148, 360 (1999). pdf
• S. Roorda, Low temperature relaxation in amorphous silicon made by ion implantation, Nucl. Instr. and Meth. B 148, 366 (1999). pdf
• K. Awazu, S. Roorda, and J.L. Brebner, Metastable amorphous SiO₂ created by ion implantation, Mater. Res. Soc. Symp. Proc. 504, 21 (1999). pdf
• M. Cai, T. Veres, R.W. Cochrane, S. Roorda, R. Abdouche, and M. Sutton, Ion beam mixing and thermal demixing of Co/Cu multilayers, Mater. Res. Soc. Symp. Proc. 504, 197 (1999). pdf
• A.L. Tchebotareva, J.L Brebner, S. Roorda, and J. Albert, Implantation des protons dans le coeur d’une fibre standard monomode: Effet sur la photosensibilité à la lumière UV, Extended Abstract for the ACFAS (1998). pdf

• S. Acco, D.L. Williamson, W.G.J.H.M. van Sark, W.C. Sinke, W.F. van der Weg, A. Polman, and S. Roorda, Nanoclustering of hydrogen in ion-implanted and plasma-grown amorphous silicon, Phys. Rev. B 58, 12853 (1998). pdf
• Xiao Liu, P.D. Vu, R.O. Pohl, F. Schiettekatte, and S. Roorda, Generation of low-energy excitations in silicon, Phys. Rev. Lett. 81, 3171 (1998). pdf
• S.C. Gujrathi, S. Roorda, J,G, D’Arcy, R. J. Pflueger, P. Desjardins, I. Petrov, and J.E. Greene, Quantitative compositional depth profiling of Si_1-x-yGe_xC_y thin films by simultaneous elastic recoil detection and Rutherford backscattering spectrometry, Nucl. Instr. and Meth., B 136-138, 654 (1998). pdf
• S. Acco, D.L. Williamson, S. Roorda, W.G.J.H.M. van Sark, A. Polman, and W.F. van der Weg, Structural defects and hydrogen clustering in amorphous silicon, J. Non-Cryst. Solids. 227-230, 128 (1998). pdf
• P. Cottin, R.A. Lessard, E.J. Knystautas, and S. Roorda, Optical and structural effects of ion implantation in polymer waveguides, SPIE Proceedings Vol. 3413, 37 (1998). pdf
• S. Roorda, F. Schiettekatte, M. Cai, T. Veres, and A. Tchebotareva, MeV ion implantation for modification of electronic, optical, and magnetic materials, SPIE Proceedings Vol. 3413, 165 (1998). pdf

• M. Chicoine, S. Roorda, L. Cliche, and R. A. Masut, Directional effects during ion implantation: Lateral mass transport and anisotropic growth, Phys. Rev. B 56, 1551 (1997). pdf
• A. Rivard, G. Leclerc, M. Bouchard, G. Beaudoin, R. Carrier, C. Janicki, and S. Roorda, Low dose beta emitting radioactive stents inhibit neointimal hyperplasia in porcine coronary arteries: an histological assessment, Presented at American College of Cardiology 46th annual scientific session (1997). nopdf
• M. Cai, T. Veres, S. Roorda, R.W. Cochrane, R. Abdouche, and M. Sutton, MeV ion irradiation of Co/Cu multilayers, J. Appl. Phys. 81, 5200 (1997). pdf

• L. Cliche, S. Roorda, G. E. Kajrys, and R.A. Masut, A comparison of annealing kinetics in crystalline and amorphous InP, J. Appl. Phys. 79, 2142 (1996). pdf
• S. Acco, D.L. Williamson, P.A. Stolk, F.W. Saris, M.J. van den Boogaard, W.C. Sinke, W.F. van der Weg, S. Roorda, and P.C. Zalm, Hydrogen solubility and network stability in amorphous silicon, Phys. Rev. B 53, 4415 (1996). pdf

• M. Verhaegen, L.B. Allard, J.L. Brebner, M. Essid, S. Roorda, and J. Albert, Photorefractive waveguides produced by ion-implantation of fused silica, Nucl. Instr. and Meth., B 106, 438 (1995). pdf
• D.L. Williamson, S. Roorda, M. Chicoine, R. Tabti, P.A. Stolk, S. Acco, and F.W. Saris, On the nanostructure of pure amorphous Si, Appl. Phys. Lett. 67, 226 (1995). pdf
• L. Cliche, S. Roorda, M. Chicoine and R.A. Masut, Directional mass transport by momentum transfer from ion beam to solid, Phys. Rev. Lett., 75'', 2348 (1995). pdf
• S. Roorda, L. Cliche, M. Chicoine, and R.A. Masut, Novel beam effect: mass transport due to the lateral component of the ion momentum'', Nucl. Instr. and Meth., B 106, 80 (1995). pdf
• K. Laaziri, S. Roorda, and J.M. Baribeau, Density of amorphous Si_xGe_1-x alloys prepared by high energy ion implantation, J. Non-Cryst. Solids, 191, 193 (1995). pdf
• S. Roorda, B. Morin, E. Soudée, and S.C. Gujrathi, Backside gettering of Cu by porous Si, Can. J. Phys. 73, 45 (1995). pdf
• L. Cliche, S. Roorda, and R.A. Masut, Viscosity of amorphous InP during room temperature structural relaxation, Nucl. Instr. and Meth. 96, 319 (1995). pdf

• L. Cliche, S. Roorda, and R.A. Masut, Persistent room temperature relaxation of InP amorphized and compacted by MeV ion beams, Appl. Phys. Lett. 65, 1754 (1994). pdf
• S. Roorda, G. Kajrys, and J. Graham, Calorimetry of ion beam damage in Si, Nucl. Instr. and Meth. B 90, 412 (1994). pdf
• K. Laaziri, S. Roorda, and L. Cliche, Density measurements of amorphous Si_xGe_1-x alloys, Nucl. Instr. and Meth. B 90, 438 (1994). pdf
• J.S. Custer, M.O. Thompson, D.C. Jacobson, J.M. Poate, S. Roorda, W.C. Sinke, and F. Spaepen, The density of amorphous Si, Appl. Phys. Lett. 64, 437 (1994). pdf
• R.A. Hakvoort, A. van Veen, H. Schut, M.J. van den Boogaard, A.J.M. Berntsen, S. Roorda, P.A. Stolk, and A.H. Reader, Characterization of amorphous Si, In: “Slow positron beam techniques for solids and surfaces”, Eds. E. Ottewitte and A.H. Weiss, AIP Conference Proceedings Volume 303, 48 (1994). pdf
• S. Bultena, S.C. Gujrathi, J.L. Brebner, A. Yelon, and S. Roorda, Nitrogen in-diffusion and accumulation in oxygen-implanted Si during thermal annealing, Proceedings of the Int. Conf. Ion Implantation Technology (Catania), p. 791 (1994). nopdf
• S. Roorda, Divacancy annealing in silicon monitored by differential scanning calorimetry and infrared absorption spectroscopy, Mater. Res. Soc. Symp. Proc. 316, 159 (1994). pdf

• S. Roorda, R.A. Hakvoort, A. van Veen, P.A. Stolk, and F.W. Saris, Structural and electrical defects in amorphous silicon probed by positrons and electrons, J. Appl. Phys. 72, 5145 (1992). pdf
• R.A. Hakvoort, S. Roorda, A. van Veen, M.J. van den Boogaard, F.J.M. Buters, and H. Schut, Positron beam analysis of amorphous Si, Mater. Sci. For. 105-110, 1391 (1992). pdf
• Y.N. Erokhin, R. Grötzschel, S.R. Oktyabrsky, S. Roorda, W.C. Sinke, and A.F. Vyatkin, Mesotaxy by Ni-diffusion into a buried amorphous silicon layer, Mater. Sci. and Eng., B 12, 103 (1992). pdf
• P.A. Stolk, L. Calcagnile, S. Roorda, W.C. Sinke, A.J.M. Berntsen, and W.F. van der Weg, Defects in a-Si probed by sub-picosecond photocarrier dynamics, Appl. Phys. Lett. 60, 1688 (1992). pdf
• S. Roorda, W.C. Sinke, J.M. Poate, D.C. Jacobson, S. Dierker, B.S. Dennis, D.J. Eaglesham, F. Spaepen, and P. Fuoss, Structural relaxation and defect annihilation in pure amorphous silicon, Phys. Rev. B 44, 3702 (1991). pdf
• Y.N. Erokhin, R. Grötzschel, S.R. Oktyabrsky, S. Roorda, W.C. Sinke, and A.F. Vjatkin, A novel process to form epitaxial Si structures with buried silicide, Mater. Res. Soc. Symp. Proc. 235, 313 (1992). pdf
• P.A. Stolk, L. Calcagnile, S. Roorda, H. B. van Linden van den Heuvell, and F.W. Saris Picosecond photocarrier lifetimes in ion-irradiated amorphous and crystalline silicon, Mater. Res. Soc. Symp. Proc. 235, 15 (1992). pdf
• S. Roorda, R.A. Hakvoort, A. van Veen, P.A. Stolk, and F.W. Saris, Vacancy-type and electrical defects in amorphous silicon probed by positrons and electrons, Mater. Res. Soc. Symp. Proc. 235, 39 (1992). pdf
• S. Roorda and W.C. Sinke, Defects, entropy, and melting temperature of amorphous silicon, Mater. Res. Soc. Symp. Proc. 205, 9 (1992). pdf
• L. de Wit, S. Roorda, W.C. Sinke, F.W. Saris, A.J.M. Berntsen, and W.F. van der Weg, Structural relaxation of amorphous Si induced by high temperature annealing, Mater. Res. Soc. Symp. Proc. 205, 3 (1992). pdf
• P.A. Stolk, S. Roorda, L. Calcagnile, W.C. Sinke, H.B. van Linden van den Heuvell, and F.W. Saris Structural defects in amorphous silicon probed by subpicosecond carrier dynamics, Mater. Res. Soc. Symp. Proc. 205, 15 (1992). pdf

• S. Roorda, J.S. Custer, W.C. Sinke, J.M. Poate, D.C. Jacobson, A. Polman, and F. Spaepen, Structural relaxation in amorphous Si and the role of network defects, Nucl. Instr. and Meth. B 59, 344 (1991). pdf
• J.M. Poate, S. Coffa, D.C. Jacobson, A. Polman, J.A. Roth, G.L. Olson, S. Roorda, W.C. Sinke, J.S. Custer, M.O. Thompson, F. Spaepen, E. Donovan, Amorphous Si - the role of MeV implantation in elucidating defect and thermodynamic properties, Nucl. Instr. and Meth. B 55 533 (1991). pdf
• A. Polman, S. Roorda, P.A. Stolk, and W.C. Sinke, Triggering explosive crystallization of amorphous silicon, J. Crystal Growth 108, 114 (1991). pdf

• A. Polman, D.C. Jacobson, S. Coffa, J.M. Poate, S. Roorda, and W.C. Sinke, Defect states of amorphous Si probed by diffusion and solubility of Cu, Appl. Phys. Lett. 57, 1230 (1990). pdf
• S. Roorda, J.M. Poate, D.C. Jacobson, D.J. Eaglesham, B.S. Dennis, S. Dierker, W.C. Sinke, and F. Spaepen, Point defect populations in amorphous and crystalline silicon, Solid State Communications 75, 197 (1990). pdf
• S. Roorda, D. Kammann, W.C. Sinke, G.F.A. van de Walle, and A.A. van Gorkum, Influence of layer thickness on nucleation in amorphous silicon thin films, Mater. Lett. 9, 259 (1990). pdf
• L.A. Verhoef, P-P Michiels, S. Roorda, W.C. Sinke en R. van Zolingen, Gettering in polycrystalline silicon solar cells, Mater. Sci. and Eng. B 7, 49 (1990). pdf
• S. Roorda, J.M. Poate, D.C. Jacobson, B.S. Dennis, S. Dierker, and W.C. Sinke, Raman study of de-relaxation and defects in amorphous silicon induced by MeV ion beams, Appl. Phys. Lett. 56, 2097 (1990). pdf
• W.C. Sinke and S. Roorda, Aspects of silicon crystallization, J. Cryst. Growth 99, 222 (1990). pdf
• S. Roorda, W.C. Sinke, J.M. Poate, D.C. Jacobson, P. Fuoss, S. Dierker, B.S. Dennis, and F. Spaepen, Thermodynamic and structural properties of MeV ion beam amorphized silicon, Mater. Res. Soc. Symp. Proc. 157, 683 (1990). pdf
• S. Roorda, W.C. Sinke, J.M. Poate, D.C. Jacobson, S. Dierker, B.S. Dennis, D.J. Eaglesham, and F. Spaepen, Changing the structural state of amorphous Si by ion irradiation, Mater. Res. Soc. Symp. Proc. 157, 709 (1990). pdf
• J.S. Custer, M.O. Thompson, J.M. Poate, S. Roorda, W.C. Sinke, and F. Spaepen, The density of amorphous Si and its correlation with structure, Mater. Res. Soc. Symp. Proc. 157, 689 (1990). pdf

• W.C. Sinke, A. Polman, S. Roorda, and P.A. Stolk, Explosive crystallization of amorphous silicon: triggering and propagation, Appl. Surf. Sci. 43, 128 (1989). pdf
• A. Polman, A.M. Vredenberg, W.H. Urbanus, P.J. van Deenen, H. Alberda, H. Krop, I. Attema, E. de Haas, H. Kersten, S. Doorn, J. Derks, J. ter Beek, S. Roorda, R. Schreutelkamp, J.G. Bannenberg, and F.W. Saris, An MeV facility for materials research, Nucl. Instr. and Meth. B 37/38, 935 (1989). pdf
• S. Roorda and W.C. Sinke, Rapid nucleation in pulsed laser heated amorphous silicon, Appl. Surf. Sci. 36, 588 (1989). pdf
• W.C. Sinke, T. Warabisako, M. Miyao, T. Tokuyama, and S. Roorda, The structure of nanocrystalline silicon formed by laser-induced explosive crystallization, Appl. Surf. Sci. 36, 460 (1989). pdf
• S. Roorda, S. Doorn, W.C. Sinke, P.M.L.O. Scholte, and E. van Loenen, Calorimetric evidence for structural relaxation in amorphous Si, Phys. Rev. Lett. 62, 1880 (1989). pdf

• W. Sinke, T. Warabisako, M. Miyao, T. Tokuyama, S. Roorda, and F.W. Saris, Transient structural relaxation of amorphous silicon, J. of Non-Cryst. Solids 99, 308 (1988). pdf
• W.C. Sinke, S. Roorda, and F.W. Saris, Variable strain energy in amorphous Si, J. Mater. Res. 3, 1201 (1988). pdf
• L.A. Verhoef, S. Roorda, R.J.C. van Zolingen, and W.C. Sinke, Improved bulk and emitter quality by back-side Al doping and annealing of poly Si solar cells, Conf. Rec. 20th IEEE Photov. Spec. Conf. 1988, Las Vegas, p 1551 (1988). pdf
• W. Sinke, T. Warabisako, M. Miyao, T. Tokuyama, S. Roorda, and F.W. Saris, Transient structural relaxation and melting temperature of amorphous Si, Mater. Res. Soc. Symp. Proc. 100, 549 (1988). pdf
• S. Roorda, S. Saito, and W.C. Sinke, Solid phase epitaxial regrowth of microcrystalline silicon thin films on a (100) silicon substrate, Mater. Res. Soc. Symp. Proc. 100, 417 (1988). pdf
• S. Roorda, L.A. Verhoef, W.C. Sinke, and R.J.C. van Zolingen, Aluminium gettering in polycrystalline silicon solar cells, Proc. 8th E.C. Photov. Sol. En. Conf. Florence 1988, 1446 (1988). pdf

• S.B. Ogale, P.P. Patil, S. Roorda, and F.W. Saris, Nitridation of Fe by pulsed excimer laser treatment under liquid NH₃: Mössbauer spectroscopic study, Appl. Phys. Lett. 50, 1802 (1987). pdf
• S.B. Ogale, A. Polman, F.O.P. Quentin, S. Roorda, and F.W. Saris, Pulsed laser oxidation and nitridation of metal surfaces immersed in liquid media. Appl. Phys. Lett. 50, 138 (1987). pdf
• A. Polman, S. Roorda, W. Sinke, and F.W. Saris, Improved short circuit current of ion-implanted crystalline silicon solar cells, Proc. 7th E.C. Photovolt. Sol. En. Conf., 911 (1987). pdf
• W. Sinke, T. Warabisako, M. Moniwa, T. Tokuyama, S. Roorda, and F.W. Saris, Structural relaxation of amorphous silicon induced by nanosecond pulsed-laser irradiation, Europ. Mater. Res. Soc. Symp. Proc. XV, 279 (1987). nopdf
• A. Polman, S. Roorda, S.B. Ogale, and F.W. Saris, Faster quenching by silicon pulsed laser annealing under water, Mater. Res. Soc. Symp. Proc. 74, 129 (1987). pdf
• S. Roorda, A. Polman, S.B. Ogale, and F.W. Saris, Oxidation and nitridation by pulsed laser irradiation of solids immersed in liquids, Mater. Res. Soc. Symp. Proc. 75, 297 (1987). pdf
• Recent publications