Improved terahertz emission characteristics from photoconductive antennas integrated with micron-size 1D and 2D metal line arrays

Hannah Bardolaza; Alexander De Los Reyes; Neil Irvin Cabello; John Paul Ferrolino; Ivan Cedrick Verona; Armando Somintac; Arnel Salvador; Elmer Estacio

doi:10.1117/12.2601521

9 October 2021 Improved terahertz emission characteristics from photoconductive antennas integrated with micron-size 1D and 2D metal line arrays

Hannah Bardolaza, Alexander De Los Reyes, Neil Irvin Cabello, John Paul Ferrolino, Ivan Cedrick Verona, Armando Somintac, Arnel Salvador, Elmer Estacio

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Proceedings Volume 11906, Infrared, Millimeter-Wave, and Terahertz Technologies VIII; 1190607 (2021) https://doi.org/10.1117/12.2601521
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Abstract

Terahertz (THz) photoconductive antennas (PCA’s) from SI-GaAs substrates having one-dimensional (1D) and two-dimensional (2D) micron-size metal line arrays (MLA's) were fabricated. Photolithography and electron beam deposition of Ni/Au were used to fabricate spiral PCA’s and 1D/2D MLA's on the transmission side of the PCA. Compared to a reference bare PCA, the THz time-domain signal enhanced ~6x for 1DMLA and ~11x for 2DMLA, with their corresponding bandwidths broadened. The origin of the enhancement is being investigated but is currently attributed to spoof surface plasmon phenomena. Integrating MLA’s with PCA’s demonstrates a more cost-effective alternative to nanostructure fabrication within the PCA gap.

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Hannah Bardolaza, Alexander De Los Reyes, Neil Irvin Cabello, John Paul Ferrolino, Ivan Cedrick Verona, Armando Somintac, Arnel Salvador, and Elmer Estacio "Improved terahertz emission characteristics from photoconductive antennas integrated with micron-size 1D and 2D metal line arrays", Proc. SPIE 11906, Infrared, Millimeter-Wave, and Terahertz Technologies VIII, 1190607 (9 October 2021); https://doi.org/10.1117/12.2601521

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KEYWORDS

Principal component analysis

Terahertz radiation

Antennas

Metals

Optical lithography

Signal to noise ratio

Spectroscopy

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