Terahertz resonance frequency shifting in metamaterial metal line array fabricated on photoconductive antennas

Authors

Regine Loberternos Materials Science and Engineering Program, College of Science, University of the Philippines Diliman
Hannah Bardolaza National Institute of Physics, University of the Philippines Diliman
Jairrus Publico Materials Science and Engineering Program, College of Science, University of the Philippines Diliman
Ivan Cedrick Verona National Institute of Physics, University of the Philippines Diliman
John Paul Ferrolino Materials Science and Engineering Program, College of Science, University of the Philippines Diliman
Jose Mari Sebastian Arcilla National Institute of Physics, University of the Philippines Diliman
Kristiene Joy Fernandez Materials Science and Engineering Program, College of Science, University of the Philippines Diliman
Kenneth Jay Alaba National Institute of Physics, University of the Philippines Diliman
Lourdes Nicole Dela Rosa National Institute of Physics, University of the Philippines Diliman
Vince Paul Juguilon 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
Elmer Estacio National Institute of Physics, University of the Philippines Diliman

Abstract

Frequency shifting of the THz emission spectra of photoconductive antenna devices was demonstrated by utilizing a metamaterial consisting of gold metal line arrays. Two devices with array periodicities of ~400 μm and ~100 μm were investigated, with calculated first order resonance frequencies of ~0.2 THz and ~0.8 THz, respectively. The THz emission spectra of both devices shifted relative to the reference photoconductive antenna, toward the resonance frequencies. For the device having a 100 μm period, both a spectral shift and increase in THz power at lower frequencies was observed, which may be attributed to spoof plasmonic interactions originating from metal lines having separation distances greater than 100 μm. The results show the feasibility of tailoring the periodicity of the metamaterial structures to adjust the operating frequencies of THz devices.

Issue

2024: Proceedings of the 42nd Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2024-PA-18

Section

Poster Session A (Condensed Matter Physics and Materials Science)

Published

2024-06-28

How to Cite

[1]

R Loberternos, H Bardolaza, J Publico, IC Verona, JP Ferrolino, JMS Arcilla, KJ Fernandez, KJ Alaba, LN Dela Rosa, VP Juguilon, A Somintac, A Salvador, and E Estacio, Terahertz resonance frequency shifting in metamaterial metal line array fabricated on photoconductive antennas, Proceedings of the Samahang Pisika ng Pilipinas 42, SPP-2024-PA-18 (2024). URL: https://proceedings.spp-online.org/article/view/SPP-2024-PA-18.