Simulation of terahertz emission by a textured gallium arsenide using the Drude-Lorentz model

Authors

Paolo B. Medina ⋅ PH Department of Physical Sciences, Polytechnic University of the Philippines
Steven Francis F. Udaundo ⋅ PH Department of Physical Sciences, Polytechnic University of the Philippines
Rhenish C. Simon ⋅ PH Physics Department, De La Salle University, Manila

Abstract

We investigate the terahertz emission of textured gallium arsenide (GaAs) as a thin film of an effective medium made up of air and GaAs. The Bruggeman Effective Medium Approximation (BEMA) is used to estimate the optical property of the textured region of the GaAs substrate. Calculations for the dynamics of the photocarrier is done using the Drude-Lorentz model (DLM). We found that a GaAs thin film with a volume fraction of 0.60 to 0.64 exhibits the highest terahertz emission. The optimal thickness is found at 104 nm, 319 nm, 544 nm, 778 nm, and 1000 nm. Under the assumptions of BEMA and DLM, we can say that surface texturization is not always beneficial in enhancing THz emission. Texturization of semiconductor surface must be tuned for optimal THz enhancement.

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Issue

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

Article ID

SPP-2023-2F-05

Section

Condensed Matter Physics and Materials Science

Published

2023-07-09

How to Cite

[1]

PB Medina, SFF Udaundo, and RC Simon, Simulation of terahertz emission by a textured gallium arsenide using the Drude-Lorentz model, Proceedings of the Samahang Pisika ng Pilipinas 41, SPP-2023-2F-05 (2023). URL: https://proceedings.spp-online.org/article/view/SPP-2023-2F-05.