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2000-1992 Publications

2000

  1. Integrated high-power electro-optic lens/scanner for space-based platforms, K. Gahagan, J. Casson, Gopalan, V.; Scrymgeour, D.A.; Robinson, J.M. , (Conference Paper in Journal). Proceedings of the SPIE - The International Society for Optical Engineering. Vol. 4134, pp. 133-7; (2000). PDF

  2. Domain reversal and wall structure of 180° ferroelectric domains in LiTaO3 crystals, V. Gopalan, K. Kitamura, Y. Furukawa,   Fundamental Physics of Ferroelectrics 2000, Aspen Center for Physics, Winter Workshop, Editor: R. E. Cohen, p 183-190,  American Institute of Physics (2000). PDF

  3. Experimental study of internal fields and movement of single ferroelectric domain walls, Yang, T.J. ; Gopalan, V. ; Swart, P. ; Mohideen, U. Journal of the Physics and Chemistry of Solids61, 275 (2000). PDF

  4. Domain switching performance of stoichiometric LiTaO3 for bulk quasi-phase matching devices, Kitamura, K.; Furukawa, Y.; Takekawa, S.; Hatanaka, T.; Ito, H.; Gopalan, V.; Injeyan, H.; Keller, U.; Marshall, C., OSA Trends in Optics and Photonics. Advanced Solid State Lasers. Vol.34. Proceedings. Opt. Soc. America, Washington, DC, USA. pp. 321-3; (2000).

  5. Direct X-ray Synchrotron imaging of strains at 180° domain walls in congruent LiNbO3 and LiTaO3 crystals, S. Kim, B. Steiner, V. Gopalan, Appl. Phys. Lett. 77, 2051-53 (2000). PDF

  6. Ferroelectric domain reversal in congruent LiTaO3 at elevated temperatures,  C. C. Battle, S. Kim, V. Gopalan,  K. Borkacy, M. C. Gupta, Appl. Phys Lett. 76, 2436 (2000).  PDF

1999

  1. Observation of mobility study of single 180° domain wall in LiTaO3, T. J. Yang, U. Mohideen, V. Gopalan, P. J. Swart, Ferroelectrics 222 (1-4), 609 (1999).

  2. In-situ video observation of 180° domain kinetics in congruent LiNbO3 crystals, V. Gopalan, Q. X. Jia, T. E. Mitchell, Appl. Phys. Lett. 75, 16 (1999).  PDF

  3. Ferroelectric domain kinetics in congruent LiTaO3, V. Gopalan, A. Itagi, S. Gerstl, P. Swart, Q. X. Jia, T. E. Mitchell, T. E. Schlesinger, D. D. Stancil, Integrated Ferroelectrics, 27, 137 (1999).

  4. Fabrication and characterization of high-speed integrated electro-optic lens and scanner devices, K. T. Gahagan, V. Gopalan, J. M. Robinson, Q. X. Jia, T. E. Mitchell, M. J. Kawas, T. E. Schlesinger, D. D. Stancil, Proceedings of the SPIE3620, (1999). PDF

  5. Integrated optical device with second-harmonic generator, electrooptic lens, and electrooptic scanner in LiTaO3,  Yi Chiu, V. Gopalan, M. J. Kawas, T. E. Schlesinger, D. D. Stancil, W. P. Risk, J. Lightwave Technol.  17, 462 (1999). Link

  6. Integrated Electro-optic lens/scanner in LiTaO3 single crystal, K. T. Gahagan, V. Gopalan, J. M. Robinson, Q. X. Jia, T. E. Mitchell, Applied Optics, 38, 1186 (1999).  PDF

  7. Shape-optimized electrooptic beam scanners: Experiment, J. C. Fang, M. J. Kawas, J. Zou, V. Gopalan, T. E. Schlesinger, D. D. Stancil, IEEE Photonic Technol. Lett. 11, 1041 (1999). PDF

  8. Integration of electro-optic lenses and scanners on ferroelectric LiTaO3, V. Gopalan, K. T. Gahagan, M. Kawas, Q. X. Jia, J. M. Robinson, T. E. Mitchell, T. E. Schlesinger, D. D. Stancil, Integrated Ferroelectrics, 25, 31 (1999).

  9. Mobility of 180° domain walls in congruent LiTaO3 measured using in-situ electro-optic imaging microscopy, V. Gopalan, S. S. A. Gerstl, A. Itagi, Q. X. Jia, T. E. Mitchell, T. E. Schlesinger, D. D. Stancil, J. Appl. Phys. 86, 1638 (1999).  PDF

  10. In situ video observation of 180° domain switching in LiTaO3 by electro-optic imaging microscopy, V. Gopalan , T. E. Mitchell, J. Appl. Phys., 85, 2304 (1999).  PDF

  11. Switching kinetics of 180° domains in congruent LiNbO3 and LiTaO3 crystals, V. Gopalan, T. E. Mitchell, K. E. Sickafus, Solid State Communications, 109, 111 (1999).

  12. Direct observation of pinning and bowing of a single ferroelectric domain wall, T. J. Yang, U. Mohideen, V. Gopalan, P. Swart, Phys. Rev. Lett. 82, 4106 (1999).  PDF

  13. Growth of LiNbO3 films on single crystal sapphire substrates using pulsed laser deposition, Gim, Y.; Gahagan, K.T.; Kwon, C.; Hawley, M.; Gopalan, V.; Robinson, J.M.; Mitchell, T.E.; Jia, Q.X. , Integrated Ferroelectrics. Vol. 25, Iss. 1-4, pp. 91-102; (1999).

1992 - 1998

  1. The role of stoichiometry in 180° domain switching in LiNbO3 crystals, V. Gopalan , T. E. Mitchell, K. Kitamura, N. Furukawa, Appl. Phys. Lett. , 72, 1981 (1998). PDF

  2. Wall velocities, Switching times, and stabilization mechanism of 180° domains in congruent LiTaO3 crystals, V. Gopalan, Terence E. Mitchell, J. Appl. Phys., 83, 941, (1998).  PDF

  3. Crystal growth and low coercive field 180° domain switching characteristics of stoichiometric LiTaO3, K. Kitamura, Y. Furukawa, K. Niwa, V. Gopalan, T. E. Mitchell, Applied Physics Letters, 73, 3073 (1998). PDF

  4. Real-time domain kinetics in LiTaO3 crystals, V. Gopalan, Kurt Sickafus, Terence E. Mitchell, Integrated Ferroelectrics , 22, 405[925] (1998).

  5. Ferroelectrics as a versatile solid state platform for integrated optics V. Gopalan, Terence E. Mitchell, Q. X. Jia, J. M. Robinson, M.J. Kawas, T. E. Schlesinger, D. D. Stancil, Integrated Ferroelectrics, 22,465 [985](1998).

  6. Radiation effects in corundum structure derivatives, J. N. Mitchell, R. Devanathan, N. Yu, K. E. Sickafus, C. J. Wetteland, V. Gopalan, M. A. Nastasi, K. J. McClellan, Nuclear Instruments and Methods in Physics Res. B 141, 461 (1998). PDF

  7. Electro-optic Lens stack on LiTaO3  crystals, Matthew Kawas, V. Gopalan,  T. E. Schlesinger, Daniel D. Stancil, J. Lighwave Technol. 15, 1716 (1997)

  8. Origin of internal fields and visualization of 180° domains in congruent LiTaO3 crystals, V. Gopalan and M. C. Gupta, J. Appl. Phys. 80, 6099-106 (1996). PDF

  9. Observation of internal field in LiTaO3 single crystals: Its origin and time-temperature dependence, V. Gopalan and Mool C. Gupta, Appl. Phys. Lett., 68, 888 (1996). PDF

  10. Integrated quasi-phase-matched second-harmonic generator and electrooptic scanner on LiTaO3 single crystals. V. Gopalan, Matthew Kawas, T. E. Schlesinger, Mool C. Gupta, and Daniel D. Stancil, IEEE Photonics Technology Letters, 8, 1704 (1996) ; also presented CLEO’96. PDF

  11. Domain Structure and Phase transitions in epitaxial KNbO3 thin films observed by in-situ Second Harmonic Generation measurements,  V. Gopalan and Rishi Raj, Appl. Phys. Lett., 68, 1323 (1996).  PDF

  12. Periodic Domain Inversion in Z-cut LiTaO3 by Electron-Beam scanning assisted by an internal field within the Crystal, V. Gopalan and Mool C. Gupta, Proceedings, SPIE Vol. 2700, 196 (1996). PDF

  13. Domain wall pinning by grain boundaries in epitaxial KNbO3 thin films studied by in-situ Second harmonic Generation, V. Gopalan and R. Raj, Ferroelectric Thin Films VI,  493, Proceedings, Materials Research Society, Boston, p. 75, December (1997).

  14. Radiation damage effects in ferroelectric LiTaO3 single crystals, C. J. Wetteland, K. E. Sickafus, V. Gopalan, J. N. Mitchell, T. Hartmann, M. Nastasi,  C. J. Maggiore, J. R. Tesmer, T. E. Mitchell, Proceedings,  Materials Research Society, Fall Meeting,  at Boston, December (1997). PDF

  15. Internal fields in lithium tantalate single crystals, V. Gopalan and Mool C. Gupta, Proccedings, SPIE, Vol. 2700, 28 (1996). PDF

  16. In-Situ X-Ray Diffraction Study of Phase Transitions in Epitaxal KNbO3 Thin Films, V. Gopalan, Rishi Raj,  Ferroelectrics  200, Numbers 1-4 pp. 343-351(1997).

  17. Origin and characteristics of internal fields in LiNbO3 crystals, V. Gopalan, and Mool C. Gupta, Ferroelectrics  198, 1-4 pp. 49-59 (1997);.

  18. Origin of internal field and visualization of 180° domains in congruent LiTaO3 crystals, V. Gopalan, and Mool C. Gupta, J. Appl. Phys. 80, 6099 (1996).  PDF

  19. Integrated second harmonic generator and high speed optical beam scanner for data storage, Daniel D. Stancil, V. Gopalan, M. Kawas,  M. C. Gupta, J. Li,  Idema Insight, 9 (5) 4 (1996).

  20. Structure-Optical Property Correlation of Epitaxial Potassium Niobate Thin Films Deposited on Magnesium Oxide (100) Substrates Using a Strontium Titanate Transition layer, V. Gopalan and Rishi Raj,  J. Am. Cer. Soc., 78, 1825 (1995). PDF

  21. Orientation Control of KNbOthin films deposited by laser ablation on single crystal MgO substrates using SrTiO3 transition layers, V. Gopalan, Huyang Xie, Wei-Yung Hsu and Rishi Raj, Ferroelectrics, 152, 55 (1994).

  22. Domain Structure-Second Harmonic Generation Correlation in Potassium Niobate thin films on Strontium Titanate substrates, V. Gopalan and Rishi Raj, J.Am.Cer. Soc, 79, 3289 (1996). PDF

  23. Electric field induced domain rearrangement in potassium niobate thin films studied by in situ second harmonic generation measurements, V. Gopalan and Rishi Raj, J. Appl. Phys, 81, 865 (1996). PDF

  24. Correlation between Structural and Optical  properties in Proton-Exchanged LiNbO3, W. Y. Hsu, Gabriel Braunstein,V. Gopalan, Craig S. Willand and Mool C. Gupta, Appl. Phys. Lett. 61, 3083 (1992).  PDF

  25. Effect of Proton Exchange on the non-linear optical properties of LiNbO3 and LiTaO3, W. Y. Hsu, Craig S. Willand, V. Gopalan, and Mool C. Gupta, Appl. Phys. Lett. 61, 2263 (1992).  PDF

  26. Domain inversion in LiNbO3 using direct electron-beam writing, Alan C. G. Nutt,  V. Gopalan and Mool C. Gupta, Appl. Phys. Lett. 60, 2828 (1992).  PDF

  27. Design of high efficiency Quasi-Phase matched devices for Second Harmonic Generation, Part A - Waveguide Structure effects, V. Gopalan, Thomas A. Strasser, W.Y. Hsu and Mool C. Gupta, Technical report (284158D), Eastman Kodak Company, Rochester, NY (Dec. 1992).

  28. Design of high efficiency Quasi-Phase matched devices for Second Harmonic Generation, Part B - Domain Shape Effects, T. A. Strasser, V. Gopalan, W. Y. Hsu, and Mool C. Gupta, Technical report (284157C), Eastman Kodak Company, Rochester, NY (Dec 1992).