David Moor


Last Name

Moor

First Name

David

ORCID

0000-0002-0930-4604

Organisational unit

03974 - Leuthold, Juerg / Leuthold, Juerg

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2018 - 201922020 - 202547
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Publications1 - 10 of 49
  • C- and O-Band Dual-Polarization Fiber-to-Chip Grating Couplers for Silicon Nitride Photonics
    Item type: Journal Article
    Kohli, Manuel; Chelladurai, Daniel; Vukovic, Boris; et al. (2023)
    ACS Photonics
    Highly efficient coupling of light from an optical fiber to silicon nitride (SiN) photonic integrated circuits (PICs) is experimentally demonstrated with simple and fabrication-tolerant grating couplers (GC). Fully etched amorphous silicon gratings are formed on top of foundry-produced SiN PICs in a back-end-of-the-line (BEOL) process, which is compatible with 248 nm deep UV lithography. Metallic back reflectors are introduced to enhance the coupling efficiency (CE) from −1.11 to −0.44 dB in simulation and from −2.2 to −1.4 dB in experiments for the TE polarization in the C-band. Furthermore, these gratings can be optimized to couple both TE and TM polarizations with a CE below −3 dB and polarization-dependent losses under 1 dB over a wavelength range of 40 nm in the O-band. This elegant approach offers a simple solution for the realization of compact and, at the same time, highly efficient coupling schemes in SiN PICs.
  • Electro-Optic Frequency Response of Thin-Film Barium Titanate (BTO) from 20 to 270 GHz
    Item type: Conference Paper
    Chelladurai, Daniel; Kohli, Manuel; Horst, Yannik Matthias Julius; et al. (2022)
    OSA Technical Digest ~ European Conference on Optical Communication (ECOC) 2022
    The electro-optical frequency response of thin-film barium titanate (BTO) has been characterized in hybrid plasmonic-photonic phase shifters across the spectral range from 20 to 270 GHz. A flat frequency response was found.
  • 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)
  • Integration of Plasmonic Components Towards Terabaud Data Transmission
    Item type: Doctoral Thesis
    Moor, David (2024)
    The rapid, accelerating growth of optical communication systems requires exponential scaling of transmission speeds. Data center interconnects and high-performance computing have both identified the electro-optic interfaces as the bottleneck for future development as more and more cost and energy is required to keep up with the increasing demand of bandwidth. The technology roadmaps of major companies in industry envision an increase of symbol rates beyond 400 GBd by 2030, which is a four-fold increase in less than 10 years. The scientific community is experimenting with solutions to provide a platform for such high datarate communication. Plasmonic modulators and photodetectors are promising candidates for cost-, space-, and energy- efficient conversion between optics and electronics. In this dissertation, the vision of a scalable, cost-efficient terabaud transceiver is outlined. Three significant challenges and the improvements that were made in the respective domains are addressed. The plasmonic modulator efficiency was increased, a BTO-based plasmonic modulator was introduced, and high-speed monolithic integration of modulator and driver was demonstrated. Firstly, a comprehensive study on integration options for terabaud transceivers showcases the capability of plasmonics and identifies flip-chip and monolithic integration of PIC and EIC as viable options. Secondly, the Pockels material BTO/BaTiO3/barium titanate has recently attracted considerable attention after first demonstrations of plasmonic modulators were shown. In this thesis, a photolithography-compatible design was developed based on low-loss TM-plasmonics. Thirdly, resonant enhancement of plasmonic modulators has gained a lot of attention. Conventionally, this is achieved by employing an optical cavity and thereby effectively passing light through the modulator multiple times. In this thesis, a novel microwave resonator was conceived and studied. This design is complementary to the optical resonator. The resonant enhancement was achieved by a microwave cavity, which allows the radio frequency wave to pass multiple times, enhancing the voltage in the modulator. Finally, monolithic integration of plasmonic modulators and driver electronics were demonstrated at record speeds. This dissertation covers significant ground towards future terabaud transceivers and reveals the next challenges in the development of integration technology and electronics.
  • Pockels Coefficients in Thin-Film Barium Titanate and Lithium Niobate up to 300 GHz
    Item type: Conference Paper
    Chelladurai, Daniel; Kohli, Manuel; Horst, Yannik Matthias Julius; et al. (2023)
    Technical Digest Series ~ Conference on Lasers and Electro-Optics 2023
    The Pockels coefficients in thin-film barium titanate (BTO) and lithium niobate (LN) have been measured for modulating frequencies up to 300 GHz. BTO’s effective nonlinearity is ~10 times larger than LN’s with a small frequency dependence
  • 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 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.
  • 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.
  • Ultra-wideband MHz to THz plasmonic EO modulator
    Item type: Journal Article
    Horst, Yannik Matthias Julius; Moor, David; Chelladurai, Daniel; et al. (2025)
    Optica
    Electromagnetic fields at terahertz frequencies open a window to multiple applications, such as wireless communication, sensing, and medical imaging. Yet the challenge remains to effi- ciently generate, receive and process such high frequencies. In this work, we investigate plasmonic modulators to bring THz frequencies to photonic integrated circuits (PICs). We demon- strate a frequency response beyond the 1 THz and develop an equivalent circuit model of the modulator. Our results show that plasmonic modulators are uniquely suited for THz PICs.
  • 16 Gb/s microring-to-microring photonic link in 45 nm monolithic zero-change CMOS
    Item type: Conference Paper
    Eppenberger, Marco; Moor, David; Josten, Arne; et al. (2018)
    OSA Technical Digest ~ Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF)
Publications1 - 10 of 49