DOE OSTI · 3025378
Monolithic optoelectronic circuit design for on-chip terahertz applications
Abstract
We demonstrate a monolithic coplanar stripline platform for on-chip terahertz (THz) generation, transmission, and detection, addressing key challenges of mode purity, bandwidth, and referencing. Capacitive coupling of the photoconductive generator switch enforces pure odd-mode propagation, increases THz field strength, and extends the operational frequency range, achieving 0.05–1.4 THz. Our architecture enables fully monolithic fabrication with amorphous silicon switches, in situ field referencing, and galvanic isolation between generation and detection. Finite-element simulations and experiments confirm that suppressing parasitic modes improves signal integrity, providing a robust platform for high-fidelity THz spectroscopy, ultrafast electronics, and nanoscale quantum materials research.
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Kusyak, Kateryna [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Columbia Univ., New York, NY (United States); Center for Free-Electron Laser Science, Hamburg (Germany)] (ORCID:0009000341159034), Schulte, Benedikt [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Columbia Univ., New York, NY (United States); Center for Free-Electron Laser Science, Hamburg (Germany)] (ORCID:0000000176050547), Matsuyama, Toru [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Center for Free-Electron Laser Science, Hamburg (Germany)] (ORCID:0000000178787374), Kipp, Gunda [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Center for Free-Electron Laser Science, Hamburg (Germany)] (ORCID:0009000717203700), Bretscher, Hope M. [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Columbia Univ., New York, NY (United States); Center for Free-Electron Laser Science, Hamburg (Germany)] (ORCID:0000000165514721), Day, Matthew W. [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Columbia Univ., New York, NY (United States); Center for Free-Electron Laser Science, Hamburg (Germany)] (ORCID:0000000222760831), Meier, Guido [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Center for Free-Electron Laser Science, Hamburg (Germany)] (ORCID:0000000156182155), Potts, Alexander M. [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Columbia Univ., New York, NY (United States); Center for Free-Electron Laser Science, Hamburg (Germany)] (ORCID:0000000335021701), McIver, James W. [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Columbia Univ., New York, NY (United States); Center for Free-Electron Laser Science, Hamburg (Germany)] (ORCID:0000000301825031). 2025-07-25. Monolithic optoelectronic circuit design for on-chip terahertz applications. https://doi.org/10.1063/5.0278183
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