Daniel Chelladurai


Last Name

Chelladurai

First Name

Daniel

ORCID

0000-0003-3877-600X

Organisational unit

03974 - Leuthold, Juerg / Leuthold, Juerg

Filters

2017 - 2019112020 - 202631
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Publications 1 - 10 of 42
  • Bypassing Loss in Plasmonic Modulators
    Item type: Conference Paper
    Haffner, Christian; Chelladurai, Daniel; Fedoryshyn, Yuriy; et al. (2018)
    Proceedings of the 2018 Conference on Lasers and Electro-Optics (CLEO)
  • Microwave Resonant Plasmonic Modulator for Sub-THz Receivers
    Item type: Other Conference Item
    Vukovic, Boris; Moor, David; Fedoryshyn, Yuriy; et al. (2024)
    Technical Digest Series ~ CLEO 2024
    A coplanar-waveguide-based resonator is used to enhance plasmonic modulators at 250 GHz by 5 dB with a bandwidth of 44 GHz. This impedance matching is a compact, low-complexity solution to enhance the efficiency at high modulation frequencies for sub-THz wireless communication.
  • Sub-V Opto-Electro-Mechanical Switch
    Item type: Conference Paper
    Haffner, Christian; Jörg, Andreas; Mayor, Felix; et al. (2019)
    OSA Technical Digest ~ Proceedings of the 2019 Conference on Lasers and Electro-Optics (CLEO)
  • Barium titanate and lithium niobate permittivity and Pockels coefficients from megahertz to sub-terahertz frequencies
    Item type: Journal Article
    Chelladurai, Daniel; Kohli, Manuel; Winiger, Joel; et al. (2025)
    Nature Materials
    The Pockels effect is essential for controlling optical signals at the highest speeds, particularly for electro-optic modulators in photonic integrated circuits. Lithium niobate (LN) and barium titanate (BTO) are two excellent Pockels materials to this end. Here we measure the Pockels coefficients and permittivity in LN and BTO over a continuous frequency range from 100 MHz to 330 GHz. These properties are constant across this frequency range in LN, but have a strong frequency dependence in BTO. Still, our measurements show that BTO has remarkable electro-optic properties compared with LN. Furthermore, we show how BTO devices can be designed with a flat electro-optic frequency response despite the Pockels coefficient dispersion. Finally, we expound our method for broadband characterization of these vital electro-optic properties, utilizing specialized integrated electro-optic phase shifters. Altogether, this work empowers the design of high-speed BTO devices and the development of new electro-optic materials.
  • Photonic-Plasmonic Hybrid Waveguide Couplers with a 91% Efficiency
    Item type: Conference Paper
    Chelladurai, Daniel; Doderer, Michael; Koch, Ueli; et al. (2018)
    OSA Technical Digest ~ Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF)
    A directional coupling scheme with 91% efficiency (-0.4 dB) between silicon photonic waveguides and hybrid-plasmonic waveguides (metal-insulator-semiconductor) is demonstrated.
  • Plasmonic Ferroelectric Modulator Monolithically Integrated on SiN for 216 GBd Data Transmission
    Item type: Journal Article
    Kohli, Manuel; Chelladurai, Daniel; Messner, Andreas; et al. (2023)
    Journal of Lightwave Technology
    A high-speed plasmonic barium titanate (BTO, BaTiO3) Mach-Zehnder modulator is presented. We combine nanoscale plasmonics with BTO as solid-state active material and silicon nitride (SiN) for versatile and low loss waveguiding, and integrate them in a monolithic platform. We demonstrate a plasmonic BTO modulator processed onto foundry-produced SiN. The 15 μm long high-speed modulator features a flat electro-optic frequency response up to 70 GHz and is expected to be flat way beyond. A low VπL product of 144 Vμm is shown. Data experiments reaching 216 Gbit/s with a 216 GBd 2PAM signal and 256 Gbit/s with a 128 GBd 4PAM signal are demonstrated. The merger of the versatile silicon nitride platform with high-speed plasmonics using the highly nonlinear ferroelectric BTO is an attractive solution as a future Tb/s optical interconnect platform.
  • Low-Loss Coupler to Vertical Plasmonic Waveguides
    Item type: Conference Paper
    Chaluvadi, Aditi; Vukovic, Boris; Bisang, Dominik; et al. (2025)
    Technical Digest Series ~ Frontiers in Optics + Laser Science 2025 (FiO, LS)
    We present a coupler from silicon photonic to vertical plasmonic metal-insulator-metal waveguides with a measured efficiency of -1.4 dB at 1550 nm, and an optical bandwidth of more than 100 nm.
  • Plasmonic Resonators for High-speed Communication
    Item type: Conference Paper
    Haffner, Christian; Chelladurai, Daniel; Juchli, Lukas; et al. (2018)
    OSA Technical Digest ~ Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF)
  • 200 Gbit/s Barium Titanate Modulator Using Weakly Guided Plasmonic Modes
    Item type: Conference Paper
    Chelladurai, Daniel; Kohli, Manuel; Bitachon, Bertold Ian; et al. (2023)
    Technical Digest Series ~ Optical Fiber Communication Conference (OFC) 2023
    A plasmonic Mach-Zehnder modulator based on thin-film barium titanate is introduced demonstrating line rates up to 200 Gbit/s. The structure enables low insertion loss and high optical power stability without a DC bias during operation.
  • Electro-Optic Frequency Response of Thin-Film Barium Titanate (BTO) from 20 to 270 GHz
    Item type: Conference Poster
    Chelladurai, Daniel; Kohli, Manuel; Horst, Yannik Matthias Julius; et al. (2022)
Publications 1 - 10 of 42