Dependence of terahertz photoconductive switch performance on metal contact geometry
This study investigates the emission and spectral characteristics of photoconductive THz switches employing coplanar stripline contact geometries fabricated on a GaAs substrate. The experimental results reveal how the power outputs as well as the spectral shape are significantly influenced by the strip width dimension. Utilizing the Drude–Lorentz conductivity model, photocarrier dynamics were analyzed through an RLC circuit framework, offering insights into how the contact design influences the spectral response. Our findings suggest that matching the photocurrent impedance to that of the metallic contacts is critical to improving the efficiency of these devices.
Authors
- Vitalij Kovalevskij
- Kȩstutis Ikamas (ORCID: https://orcid.org/0000-0002-2165-3866)
- Ignas Nevinskas (ORCID: https://orcid.org/0000-0003-3441-4722)
- Ričardas Norkus (ORCID: https://orcid.org/0000-0002-2343-2821)
- Andrejus Geižutis (ORCID: https://orcid.org/0000-0002-6161-006X)
- Mindaugas Kamarauskas (ORCID: https://orcid.org/0000-0003-4721-9694)
- Andrzej Urbanowicz (ORCID: https://orcid.org/0000-0002-2769-452X)
- Andrius Bičiūnas (ORCID: https://orcid.org/0000-0001-9456-9027)
Institutions
- Vilnius University (LT)
- Center for Physical Sciences and Technology (LT)
- General Jonas Žemaitis Military Academy of Lithuania (LT)
Publication Details
- Journal
- Lithuanian Journal of Physics
- Published
- 2024-12-13
- DOI
- https://doi.org/10.3952/physics.2024.64.4.6
- Citations
- 1
- Primary Topic
- Terahertz technology and applications
- Type
- article
- Field-Weighted Citation Impact
- 0.21
Funders
- Lietuvos Mokslo Taryba