James Im


Materials Science and Engineering
1106 S.W. Mudd
Mail Code: 4701
New York, NY 10027
Email: ji12@columbia.edu

Research Specialty

Laser-induced crystallization of thin films, phase transformations & nucleation in condensed systems.

Excimer Laser-Induced Crystallization (ELC) of Amorphous Si Films:

(1) experimental, numerical, and theoretical investigations on various far-from equilibrium/melt-mediated phase transformations encountered in ELC; and
(2) development of the sequential lateral solidification (SLS) method for producing single-crystal Si on glass and plastic substrates for fabrication of low-temperature single-crystal thin-film-transistor (LT s-Si TFT) devices.

Nucleation in Condensed Systems:

(1) development of a new experimental technique for measuring the isothermal solid nucleation rates in mildly supercooled liquid Si over a wide frequency range; and
(2) theoretical and numerical analyses of thermal and athermal nucleation in condensed system.


Massachusetts Institute of Technology
Ph.D. (Electronic Materials), 1989

Cornell University
B.S. with Distinction (Materials Science), 1984


  • Bohmisch Physical Society
  • Sigma Xi
  • Alpha Sigma Mu

Professional Experience

Columbia University, New York

  • Professor of Materials Science and Engineering (2002 - Present)
  • Chair of Materials Science and Engineering Program (2002 - Present)
  • Associate Professor of Materials Science and Engineering (1995 - 2002)
  • Assistant Professor of Materials Science and Engineering (1991-1994)

California Institute of Technology

  • Research Fellow in Applied Physics (1989-1991)

MIT Lincoln Laboratory

  • Research Consultant - Electronic Materials Group (1988-1989)

Professional Affiliations

  • Materials Research Society
  • American Physical Society


James S. Im, “A New Excimer-Laser-Annealing Method for Manufacturing Large OLED Displays,”  MRS Proceedings, 1426, mrss12-1426-a15-06, (2012)

G.S. Ganot, P.C. van der Wilt, H.K. Effron, B.A. Turk, U.J. Chung, A.M. Chitu, A.B. Limanov and James S. Im, "Mechanism of Twin Formation in Excimer-laser-induced Lateral Solidification of Si Films," MRS Proceedings, 1426, mrss12-1426-a15-06, (2012) doi:10.1557/opl.2012.1179

K. Omori, G.S. Ganot, U.J. Chung, A.M. Chitu, A.B. Limanov and James S. Im, "Flash-Lamp-Induced Lateral Solidification of Thin Si Films". MRS Proceedings, 1321 , mrss11-1321-a03-04 (2011) doi:10.1557/opl.2011.930

Q. Hu, Catherine S. Lee, T. Li, Y. Deng, U.J. Chung, A. B. Limanov, A. M. Chitu, M.O. Thompson and James S. Im, "Excimer-Laser-Induced Melting and Solidification of PECVD a-Si films under Partial- Melting Conditions," Mater. Res. Soc. Symp. Proc. Vol. 1321, (2011) doi:10.1557/opl.2011.933

James S. Im, Monica Chahal, P.C. van der Wilt, U.J. Chung, G.S. Ganot, A.M. Chitu, Naoyuki Kobayashi, K. Ohmori, A.B. Limanov, "Mixed-phase solidification of thin Si films on SiO2," Journal of Crystal Growth, vol. 312, issue 19, pp. 2775-2778, (2010) doi.org/10.1016/j.jcrysgro.2010.05.037

Y. Deng, Q. Hu, U. J. Chung, A. M. Chitu, A. B. Limanov, and James S. Im, "On the Mechanism of Nucleation in Pulsed-Laser Quenched Si Films on SiO2", Mater. Res. Soc. Symp. Proc. Vol. 1245: 1245-A12-03 (2010) doi:10.1557/PROC-1245-A12-03

S. Hazair, P. C. van der Wilt, Y. Deng, U.-J. Chung, A. B. Limanov and James S. Im, "Nucleation-Initiated Solidification of Thin Si Films," MRS Proceedings, 979 , 0979-HH11-22 (2006), doi:10.1557/PROC-979-0979-HH11-22

P.C. van der Wilt, M.G. Kane, A.B. Limanov, A.H. Firester, L. Goodman, J. Lee, J.R. Abelson, A.M. Chitu and James S. Im, "Low-Temperature Polycrystalline Silicon Thin-Film Transistors and Circuits on Flexible Substrates", MRS Bulletin June, 31: pp 461-465 (2006) doi:10.1557/mrs2006.119

J. B. Choi, Min H. Choi, U.-J. Chung, A. B. Limanov and James S. Im, "The Origin and Implications of (111)-Textured Grains Obtained via Nucleation and Growth of Solids in Pulsed-Laser-Quenched Al Films on SiO2," MRS Proceedings, 979 , 0979-HH11-50 (2006) doi:10.1557/PROC-979-0979-HH11-50

M. A. Crowder, A. B. Limanov, B. A. Turk and James S. Im, "Characterization & Analysis of Sub-Grain Boundaries in Sequential Lateral Solidification Processed SOI Films," MRS Proceedings, 685 , D11.3.1 (2001) doi:10.1557/PROC-685-D11.3.1

Hans S. Cho, Dongbyum Kim, Alexander B. Limanov, Mark A. Crowder and James S. Im, "Sequential Lateral Solidification of Ultra-Thin a-Si Films," MRS Proceedings, 621 , Q9.9.1 (2000) doi:10.1557/PROC-621-Q9.9.1

M. A. Crowder, Robert S. Sposili, A. B. Limanov and James S. Im, "Sequential Lateral Solidification of PECVD and Sputter Deposited a-Si Films," MRS Proceedings, 621, Q9.7.1 (2000) doi:10.1557/PROC-621-Q9.7.1

M. A. Crowder, A. B. Limanov, and James S. Im, "Sub-grain Boundary Spacing in Directionally Crystallized Si Films Obtained via Sequential Lateral Solidification," Mat. Res. Soc. Symp. Proc. Vol 621, Q9.6.1 (2000) doi:10.1557/PROC-621-Q9.6.1

J.P. Leonard and James S. Im, "Modelling Solid Nucleation and Growth In Supercooled Liquid," MRS Proceedings, 580, 233 (1999) doi:10.1557/PROC-580-233

Jung H. Yoon and James S. Im, "Rapid melting dynamics of amorphous Si films" Metals and Materials International, Vol. 5:6 (1999), 525-532, doi: 10.1007/BF03026299

James S. Im, M. A. Crowder, Robert S. Sposili, J. P. Leonard, H. J. Kim, J. H. Yoon, Vikas V. Gupta, H. Jin Song, and Hans Cho, "Controlled super-lateral growth of Si films for microstructural manipulation and optimization," Physica Status Solidi 166, 603 (1998)

James S. Im, Vikas V. Gupta, and M. A. Crowder, "On determining the relevance of athermal nucleation in rapidly quenched liquids," Appl. Phys. Lett. 72, 662 (1998)

Vikas V. Gupta, H. Jin Song and James S. Im, "Numerical Analysis of excimer-laser induced melting and solidification of this Si films," Appl. Phys. Lett. 71, 99 (1997) doi.org/10.1063/1.119481

James S. Im, Robert S. Sposili, and M. A. Crowder, "Single-crystal Si films for thin-film transistor devices," Appl. Phys. Lett. 70, 3434 (1997) doi.org/10.1063/1.119194

Robert S. Sposili and James S. Im, "Sequential lateral solidification of thin silicon films on SiO2," Appl. Phys. Lett. 69, 2864 (1996) doi.org/10.1063/1.117344

H. Jin Song and James S. Im, "Single-crystal Si islands on SiO2 obtained via excimer laser irradiation of a patterned Si film," Appl. Phys. Lett. 68, 3165 (1996) doi.org/10.1063/1.115812

H. J. Kim and James S. Im, "New excimer-laser-crystallization method for producing large-grained and grain boundary-location-controlled Si films for thin-film transistors," Appl. Phys. Lett. 68, 1513 (1996) doi.org/10.1063/1.115683

James S. Im and Robert S. Sposili, "Crystalline Si films for Integrated Active-Matrix Liquid-Crystal Displays," Mater. Res. Bull. 21, (3)39 (1996)

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