Investigating the optical absorption of gallium arsenide with gold plasmonic nanodisk array via RCWA- and FDTD-based simulation

Authors

Kenneth Alaba ⋅ PH National Institute of Physics, University of the Philippines Diliman
Lourdes Nicole F. Dela Rosa ⋅ PH National Institute of Physics, University of the Philippines Diliman
Vince Paul P. Juguilon ⋅ PH National Institute of Physics, University of the Philippines Diliman
Ivan Cedrick M. Verona ⋅ PH National Institute of Physics, University of the Philippines Diliman
Neil Irvin F. Cabello ⋅ PH National Institute of Physics, University of the Philippines Diliman
Alexander E. De Los Reyes ⋅ PH National Institute of Physics, University of the Philippines Diliman
Hannah R. Bardolaza ⋅ PH National Institute of Physics, University of the Philippines Diliman
Elmer S. Estacio ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

Gallium arsenide (GaAs) is a semiconductor material that is widely used in optoelectronic device fabrication. The optical properties of semiconductor materials highly influence the performance of these devices. Particularly, maximizing the optical absorption has been shown to improve the efficiency and performance of the device. In this study, we used gold (Au) plasmonic nanodisks in a rectangular array to improve the optical absorption of GaAs. The enhancement in optical absorption was investigated using finite-difference time-domain (FDTD) and rigorous coupled wave analysis (RCWA)-based simulations. It was shown that the plasmonic nanostructure was able to alter the optical properties of the material. At optimum nanodisk dimensions, a significant increase in the absorbance and absorption coefficient was observed. Moreover, a localized enhancement of the electric field was observed near the plasmonic nanodisks.

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Issue

2023: Proceedings of the 41st Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2023-2B-03

Section

Optics and Photonics

Published

2023-07-12

How to Cite

[1]

K Alaba, LNF Dela Rosa, VPP Juguilon, ICM Verona, NIF Cabello, AE De Los Reyes, HR Bardolaza, and ES Estacio, Investigating the optical absorption of gallium arsenide with gold plasmonic nanodisk array via RCWA- and FDTD-based simulation, Proceedings of the Samahang Pisika ng Pilipinas 41, SPP-2023-2B-03 (2023). URL: https://proceedings.spp-online.org/article/view/SPP-2023-2B-03.