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Ir. John George  (Associated Member)

This person is working in this group since 2011.
Affiliation: Ghent University
INTEC-ELIS
Address: Sint-Pietersnieuwstraat 41
9000 Gent
Belgium
Office: Technicum,
Phone: +32-9-264 8952
E-mail: John.PuthenParampilGeorge@elis.ugent.be
Research Area: Si/PZT Ultrafast modulators
PhD Thesis: John George, Integratie van ferro-elektrische dunne lagen op silicium voor toepassing in elektro-optische componenten, Integration of Ferroelectric Thin Films on Silicon for Electro-Optic Devices, 5/2016
JohnGeorge

Specific Research Topics

Publications (23)

    International Journals

  1. I. Ansari, J. George, G.F Feutmba, Tessa VDV, A. Pandey, Jeroen Beeckman, D. Van Thourhout, Light modulation in Silicon photonics by PZT actuated acoustic waves, ACS Photonics, p.1944-1953 doi:10.1021/acsphotonics.1c01857 (2022).
  2. G.F Feutmba, A. Hermans, J. George, H. Rijckaert, I. Ansari, D. Van Thourhout, J. Beeckman, Reversable and tunable second-order onlinear optical susceptibility in PZT thin films for integrated optics, Advanced Optical Materials, p.2100149 doi:10.1002/adom.202100149 (2021).
  3. K. Alexander, J. George, J. Verbist, K. Neyts, B. Kuyken, D. Van Thourhout, J. Beeckman, Nanophotonic Pockels modulators on a silicon nitride platform, Nature Communications, 9(1), p.3444 doi:10.1038/s41467-018-05846-6 (2018)  Download this Publication (1.2MB).
  4. J. George, P. Smet, J. Botterman, V. Bliznuk, W.MF Woestenborghs, D. Van Thourhout, K. Neyts, J. Beeckman, Lanthanide-assisted deposition of strongly electro-optic PZT thin films on silicon : toward integrated active nanophotonic devices, Journal, 7(24), p.13350-13359 doi:10.1021/acsami.5b01781 (2015)  Download this Publication (8.4MB).
  5. Y. Xing, T. Ako, J. George, D. Korn, H. Yu, P. Verheyen, M. Pantouvaki, G. Lepage, P. Absil, A. Ruocco, C. Koos, J. Leuthold, K. Neyts, J. Beeckman, W. Bogaerts, Digitally Controlled Phase Shifter using an SOI Slot Waveguide with Liquid Crystal Infiltration, Photonics Technology Letters, 27(12), p.1269 - 1272 doi:10.1109/LPT.2015.2416438  (2015)  Download this Publication (3.8MB).
  6. J. George, J. Beeckman, W. Woestenborghs, P.F. Smet, W. Bogaerts, Preferentially oriented BaTiO3 thin films deposited on silicon with thin intermediate buffer layers, Nanoscale Research Letters, 8, p.1-7 doi:10.1186/1556-276x-8-62 (2013)  Download this Publication (1.4MB).
      International Conferences

    1. I. Ansari, E. Dieussaert, J. George, G.F Feutmba, J. Beeckman, D. Van Thourhout, PZT based actuator for an efficient electro-optomechanical interaction in Si-photonic integrated circuit, SPIE Photonics West, United States, p.12004-67 doi:10.1117/12.2610629 (2022).
    2. I. Ansari, J. George, G.F Feutmba, J. Beeckman , D. Van Thourhout, Acousto-optic modulation in a Si-waveguide, IEEE International Conference on Group IV Photonics, p.paper TuC2 (2 pages) doi:10.1109/GFP51802.2021.9673971 (2021)  Download this Publication (695KB).
    3. I. Ansari, E. Dieussaert, J. George, G.F Feutmba, J. Beeckman, D. Van Thourhout, PZT based MEMS actuators for photonic integration , Annual Symposium of the IEEE Photonics Society Benelux Chapter, Belgium, (2021).
    4. G.F Feutmba, A. Hermans, J. George, I. Ansari, D. Van Thourhout, J. Beeckman, Large, Electric-Field Induced Tunable and Reversible χ (2) in PZT Thin Films for on-chip second-order nonlinearities, Conference on Lasers and Electro-Optics Europe, p.cd_11_5 (2021).
    5. G.F Feutmba, T. Van de Veire, I. Ansari, J. George, D. Van Thourhout, J. Beeckman, A Strong Pockels PZT/Si Modulator for Efficient Electro-Optic Tuning, OSA Advanced Photonics Congress (AP) 2020, p.ITu1A.6 (2020)  Download this Publication (329KB).
    6. I. Ansari, T. Van de Veire, J. George, G.F Feutmba, J. Beeckman, D. Van Thourhout, Si-photonic integrated PZT thin film for acousto-optic modulation, Conference on Lasers and Electro-Optics, United States, p.JTh2B.24 doi:10.1364/CLEO_AT.2020.JTh2B.24 (2020)  Download this Publication (539KB).
    7. G.F Feutmba, I. Luntadila Lufungula, A. Hermans, J. George, T. Van de Veire, B. Kuyken, D. Van Thourhout, J. Beeckman, Strong second-harmonic generation in PZT thin films, Annual Symposium of the IEEE Photonics Society Benelux Chapter, Netherlands, (2019).
    8. I. Ansari, T. Van de Veire, J. George, G.F Feutmba, J. Beeckman, D. Van Thourhout, Piezoelectric characterization of Si-photonic integrated PZT thin film, Annual Symposium of the IEEE Photonics Society Benelux Chapter, Netherlands, (2019)  Download this Publication (452KB).
    9. G.F Feutmba, J. George, K. Alexander, D. Van Thourhout, J. Beeckman, Hybrid PZT/Si TM/TE electro-optic phase modulators, SPIE Photonics West : Integrated Optics: Devices, Materials, and Technologies XXIII, 10921, United States, p.109210Q doi:10.1117/12.2509557 (2019).
    10. K. Alexander, J. George, G.F Feutmba, I. Luntadila Lufungula, K. Neyts, B. Kuyken, J. Beeckman, D. Van Thourhout, Nanophotonic PZT-on-SiN Pockels modulators, Smart Photonic and Optoelectronic Integrated Circuits XXI (SPIE Photonics West) (invited), 10922, United States, (2019).
    11. G.F Feutmba, J. George, K. Alexander, D. Van Thourhout, J. Beeckman, Optimization of hybrid PZT/Si electro-optic phase modulators, Annual Symposium of the IEEE Photonics Society Benelux Chapter, Belgium, p.145-148 (2018).
    12. J. George, K. Alexander, B. Kuyken, D. Van Thourhout, J. Beeckman, Advances in PZT-on-SiN electro-optic modulator platform, Advanced Photonics Congress, Switzerland, p.paper ITh3B.2 (2 pages) doi:10.1364/iprsn.2018.ith3b.2 (2018)  Download this Publication (289KB).
    13. K. Alexander, J. George, B. Kuyken, J. Beeckman, D. Van Thourhout, Broadband Electro-optic Modulation using Low-loss PZT-on-Silicon Nitride Integrated Waveguides, CLEO:2017 (Postdeadline), United States, doi:10.1364/cleo_at.2017.jth5c.7 (2017)  Download this Publication (372KB).
    14. D. Van Thourhout, M. Pantouvaki, H. D'heer, K. Alexander, B. Kuyken, I. Asselberghs, S. Brems, C. Huyghebaert, L. Abdollahi Shiramin, C. Alessandri, J. George, J.Beeckman, M. Hsu, C.Merckling, J. Van Campenhout, New materials for modulators and switches in silicon photonics, SPIE , United States, p.paper 10108-3 (2017)  Download this Publication (113KB).
    15. D. Van Thourhout, Z. Wang, B. Tian, Y. Shi, M. Pantouvaki, C. Merckling, Y. Hu, I. Asselberghs, S. Brems, L. Abdollahi Shiramin, C. Alessandri, J. George, J. Beeckman, M. Hsu, P .Absil, J. Van Campenhout, New Materials for Multifunctional Photonic ICs, Conferencia Españolade Nanofotonica (invited), Spain, p.81 (2016)  Download this Publication (57KB).
    16. D. Van Thourhout, Z. Wang, B. Tian, Y. Hu, J. George, J. Beeckman, M. Pantouvaki, C. Merckling, I. Asselberghs, S. Brems, P. Absil, M. Hsu, J. Van Campenhout, New materials and devices for optical interconnect, Opto-Electronics and Communications Conference (OECC), 2015 (invited), China, doi:10.1109/OECC.2015.7340154 (2015).
    17. Y. Xing, T. Ako, J. George, D. Korn, H. Yu, P. Verheyen, M. Pantouvaki, G. Lepage, P. Absil, C. Koos, J. Leuthold, J. Beeckman, W. Bogaerts, Direct Digital Control of an Efficient Silicon+Liquid Crystal Phase Shifter, 11th International Conference on Group IV Photonics (GFP), France, p.43-44 doi:10.1109/group4.2014.6962029 (2014)  Download this Publication (394KB).
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