Demonstration of terahertz emission from nanostructured silicon

Authors

Maria Angela Faustino ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Lorenzo Lopez ⋅ PH Material Science and Engineering Program, University of the Philippines Diliman
Joselito Muldera ⋅ PH Department of Physics, De La Salle University
Joseph Christopher Ragasa ⋅ PH National Institute of Physics, University of the Philippines Diliman
Niel Gabriel Saplagio ⋅ PH National Institute of Physics, University of the Philippines Diliman
Arvin Mabilangan ⋅ PH National Institute of Physics, University of the Philippines Diliman
Armando Somintac ⋅ PH National Institute of Physics, University of the Philippines Diliman
Elmer Estacio ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

This paper demonstrates the enhanced THz emission of surface modified silicon. The surface of silicon samples were modified via two-step metal assisted wet etching to produce silicon nanowires, and via electrochemical etching to fabricate porous silicon, respectively. After surface modification which was confirmed via scanning electron microscope, samples were characterized via terahertz-time domain spectroscopy to investigate the terahertz emission of the samples. Due to the modification of the silicon's surface up to the submicron range, multiple reflections occur within the structure which is surmised to result in the absorption of excitation source and the generation of terahertz radiation.

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Issue

2013: Proceedings of the 31st Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP2013-PB-28

Section

Poster Session PB

Published

2013-10-23

How to Cite

[1]

MA Faustino, L Lopez, J Muldera, JC Ragasa, NG Saplagio, A Mabilangan, A Somintac, and E Estacio, Demonstration of terahertz emission from nanostructured silicon, Proceedings of the Samahang Pisika ng Pilipinas 31, SPP2013-PB-28 (2013). URL: https://proceedings.spp-online.org/article/view/SPP2013-PB-28.