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

Authors

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

Issue

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

Article ID

SPP-2025-PA-28

Section

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

Published

2025-06-18

How to Cite

[1]

JMSC Arcilla, ICM Verona, JP Ferrolino, GA Catindig, DVJ Narag, J Francisco, R Andig, CEA Tan, GC Carillo, H Bardolaza, A Somintac, A Salvador, H Kitahara, M Tani, and E Estacio, Terahertz detection signal enhancement via integration of micron-sized metal line arrays on photoconductive antennas, Proceedings of the Samahang Pisika ng Pilipinas 43, SPP-2025-PA-28 (2025). URL: https://proceedings.spp-online.org/article/view/SPP-2025-PA-28.