Simulation of terahertz pulse with orbital angular momentum induced using spiral phase plate

Authors

Kenneth Alaba ⋅ PH National Institute of Physics, University of the Philippines Diliman
Hannah R. Bardolaza ⋅ PH National Institute of Physics, University of the Philippines Diliman
Nathaniel P. Hermosa II ⋅ PH National Institute of Physics, University of the Philippines Diliman
Elmer S. Estacio ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

A silicon spiral phase plate (SPP) was proposed for a pulsed terahertz signal to produce orbital angular momentum with a topological charge of l = 2. The resulting field distribution after the signal passes through the SPP was simulated using the finite-difference time-domain method and observed at different propagation distances. It shows that the double-helical spatial structure and optical vortex were best observed at the farthest distance of 7.5 cm. Additionally, the output of a source with different central frequencies was observed when using the same SPP and still showed a hollow distribution indicating structured light but with two distinct vortices near the center.

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Issue

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

Brewing waves of innovation and discovery in Physics
3-6 July 2024, Batangas State University, Pablo Borbon Campus

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Article ID

SPP-2024-PD-08

Section

Poster Session D (Photonics and Instrumentation Physics)

Published

2024-06-26

How to Cite

[1]

K Alaba, HR Bardolaza, NP Hermosa, and ES Estacio, Simulation of terahertz pulse with orbital angular momentum induced using spiral phase plate, Proceedings of the Samahang Pisika ng Pilipinas 42, SPP-2024-PD-08 (2024). URL: https://proceedings.spp-online.org/article/view/SPP-2024-PD-08.