J
John Puthenparampil George
Researcher at Ghent University
Publications - 34
Citations - 561
John Puthenparampil George is an academic researcher from Ghent University. The author has contributed to research in topics: Lead zirconate titanate & Thin film. The author has an hindex of 8, co-authored 32 publications receiving 369 citations. Previous affiliations of John Puthenparampil George include Indian Institute of Technology Madras & General Electric.
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Journal ArticleDOI
Nanophotonic Pockels modulators on a silicon nitride platform
Koen Alexander,John Puthenparampil George,Jochem Verbist,Kristiaan Neyts,Bart Kuyken,Dries Van Thourhout,Jeroen Beeckman +6 more
TL;DR: In this paper, the first electro-optic modulators based on ferroelectric lead zirconate titanate (PZT) films on SiN, in both the O- and the C-band, were demonstrated.
Journal ArticleDOI
Nanophotonic Pockels modulators on a silicon nitride platform
Koen Alexander,John Puthenparampil George,Jochem Verbist,Kristiaan Neyts,Bart Kuyken,Dries Van Thourhout,Jeroen Beeckman +6 more
TL;DR: The authors demonstrate the first electro-optic modulators based on ferroelectric lead zirconate titanate films on silicon nitride, in both the O- and the C-band with a modulation bandwidth beyond 33 GHz and with data rates of 40 Gbps.
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Digitally Controlled Phase Shifter Using an SOI Slot Waveguide With Liquid Crystal Infiltration
Yufei Xing,Thomas Ako,John Puthenparampil George,Dietmar Korn,Hui Yu,Peter Verheyen,Marianna Pantouvaki,Guy Lepage,Philippe Absil,Alfonso Ruocco,Christian Koos,Juerg Leuthold,Kristiaan Neyts,Jeroen Beeckman,Wim Bogaerts +14 more
TL;DR: In this article, a phase shifter using a silicon slot waveguide infiltrated with liquid crystal was demonstrated, achieving phase shift with a 5 V voltage, with a voltage-length product of 0.0224
Journal ArticleDOI
Lanthanide-Assisted Deposition of Strongly Electro-optic PZT Thin Films on Silicon: Toward Integrated Active Nanophotonic Devices.
John Puthenparampil George,Philippe Smet,Jonas Botterman,Vitaliy Bliznuk,Wouter Woestenborghs,D. Van Thourhout,Kristiaan Neyts,Jeroen Beeckman +7 more
TL;DR: The electro-optic measurements reveal excellent linear effective pockels coefficients of 110 to 240 pm/V, which makes the CSD deposited PZT thin film an ideal candidate for Si-based active integrated nanophotonic devices.
Journal ArticleDOI
Multi-electrode tunable liquid crystal lenses with one lithography step
Jeroen Beeckman,Tzu-Hsuan Yang,Inge Nys,John Puthenparampil George,Tsung-Hsien Lin,Kristiaan Neyts +5 more
TL;DR: A novel multi-electrode design in which only one lithography step is necessary is provided, thereby offering a greatly simplified fabrication procedure compared to earlier proposed designs.