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Scalable Large-Area Terahertz Emitters with Improved Electrode Design

Singh, A.; Welsch, M.; Winnerl, S.; Helm, M.; Schneider, H.

Abstract

We have systematically investigated the influence of electrode parameters on the emission efficiency of scalable large-area photoconductive THz emitters. We identify two contributions to THz emission, originating from the photoexcited carriers in the semiconductor and from the interdigitated metal electrodes acting as dipole antennae, respectively. Both contributions are optimized for maximum THz emission efficiency by varying the gap and stripe widths of the interdigitated metal electrodes. Using this approach we achieve a 50% improvement of the radiated THz electric field as compared to electrodes with equal stripe and gap widths.

Keywords: terahertz emitter; large-area emitter

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Verknüpfte Publikationen

  • Vortrag (Konferenzbeitrag)
    The 44th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz'2019), 01.-06.09.2019, Paris, France
  • Beitrag zu Proceedings
    44th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz'2019), 01.-06.09.2019, Paris, France
    44th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz'2019)
    DOI: 10.1109/IRMMW-THz.2019.8874010

Permalink: https://www.hzdr.de/publications/Publ-29687