Comparative study of equivalent circuit models for photoconductive antennas

O. A. Castañeda-Uribe, C. A. Criollo, S. Winnerl, M. Helm, A. Avila

Research output: Contribution to journalResearch Articlepeer-review

18 Scopus citations


Comparison of equivalent circuit models (ECM) for photoconductive antennas (PCA) represents a challenge due to the multiphysics phenomena involved during PCA operation and the absence of a standardized validation methodology. In this work, currently reported ECMs are compared using a unique set of simulation parameters and validation indicators (THz waveform, optical power saturation, and ECM voltages consistency). The ECM simulations are contrasted with measured THz pulses of an H-shaped 20μm gap PCA at different optical powers (20mW to 220mW). In addition, an alternative two-element ECM that accounts for both space-charge and radiation screening effects is presented and validated using the proposed methodology. The model shows an accurately reproduced THz pulse using a reduced number of circuital elements, which represents an advantage for PCA modeling.

Original languageEnglish (US)
Pages (from-to)29017-29031
Number of pages15
JournalOptics Express
Issue number22
StatePublished - Oct 29 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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