Terahertz detection signal enhancement via integration of micron-sized metal line arrays on photoconductive antennas

Authors

  • Jose Mari Sebastian C. Arcilla National Institute of Physics, University of the Philippines Diliman
  • Ivan Cedrick M. Verona National Institute of Physics, University of the Philippines Diliman
  • John Paul Ferrolino National Institute of Physics, University of the Philippines Diliman
  • Gerald Angelo Catindig National Institute of Physics, University of the Philippines Diliman
  • Dean Von Johari Narag National Institute of Physics, University of the Philippines Diliman
  • Jonel Francisco National Institute of Physics, University of the Philippines Diliman
  • Roni Andig National Institute of Physics, University of the Philippines Diliman
  • Craig Egan Allistair Tan National Institute of Physics, University of the Philippines Diliman
  • Gian Carlo Carillo National Institute of Physics, University of the Philippines Diliman
  • Hannah Bardolaza National Institute of Physics, University of the Philippines Diliman
  • Armando Somintac National Institute of Physics, University of the Philippines Diliman
  • Arnel Salvador National Institute of Physics, University of the Philippines Diliman
  • Hideaki Kitahara Research Center for Development of Far-Infrared Region, University of Fukui, Japan
  • Masahiko Tani Research Center for Development of Far-Infrared Region, University of Fukui, Japan
  • Elmer Estacio National Institute of Physics, University of the Philippines Diliman

Abstract

Photoconductive antenna (PCA) utilized as a terahertz (THz) detector, are integrated with metamaterials such as micron-scale metal line arrays (MLAs) on its transmission side, demonstrated improved THz signal detection. At an optical probe power of 9 mW and a PCA THz emitter biased with a 10 V peak-to-peak bias voltage, the detected peak-to-peak THz signal exhibited a 300% enhancement compared to the reference PCA. Furthermore, we conducted a parametric study to compare the performance of the devices by varying two key parameters: the peak-to-peak bias voltage applied to the THz emitter and the optical power incident on the prepared PCAs. In both cases, the saturation values of the respetcive parameters were obtained. The observed enhancement of the detected THz signal is due to extraordinary transmission effect through apertures. The findings obtained from the integration of the metamaterial structure provides an alternative and innovative way of enhancing detected THz signal levels.

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Published

2025-06-18

Issue

2025: Proceedings of the 43rd Samahang Pisika ng Pilipinas Physics Conference

Section

Poster Session PA (Photonics, Condensed Matter, Materials and Quantum Science)

License

By submitting their manuscript to the Samahang Pisika ng Pilipinas (SPP) for consideration, the Authors warrant that their work is original, does not infringe on existing copyrights, and is not under active consideration for publication elsewhere.
Upon acceptance of their manuscript, the Authors further agree to grant SPP the non-exclusive, worldwide, and royalty-free rights to record, edit, copy, reproduce, publish, distribute, and use all or part of the manuscript for any purpose, in any media now existing or developed in the future, either individually or as part of a collection.
All other associated economic and moral rights as granted by the Intellectual Property Code of the Philippines are maintained by the Authors.

How to Cite

[1]
“Terahertz detection signal enhancement via integration of micron-sized metal line arrays on photoconductive antennas”, Proc. SPP, vol. 43, no. 1, p. SPP-2025-PA-28, Jun. 2025, Accessed: Mar. 31, 2026. [Online]. Available: https://proceedings.spp-online.org/article/view/SPP-2025-PA-28