Development of a cost-effective and portable TeraHertz Time-Domain Spectroscopy setup in transmission geometry

Authors

Alexander De Los Reyes ⋅ PH National Institute of Physics, University of the Philippines Diliman
Sheryl Ann Vizcara ⋅ PH National Institute of Physics, University of the Philippines Diliman
John Daniel Vasquez ⋅ PH National Institute of Physics, University of the Philippines Diliman
Ma. Angela Faustino ⋅ PH National Institute of Physics, University of the Philippines Diliman
Lorenzo Lopez ⋅ PH National Institute of Physics, University of the Philippines Diliman
Cyril Sadia ⋅ PH National Institute of Physics, University of the Philippines Diliman
Ma. Herminia Balgos ⋅ PH National Institute of Physics, University of the Philippines Diliman
Raphael Jaculbia ⋅ PH National Institute of Physics, University of the Philippines Diliman
Joselito Muldera ⋅ PH National Institute of Physics, University of the Philippines Diliman
Christopher Que ⋅ PH Physics Department, De La Salle University
Gil Nonato Santos ⋅ PH Physics Department, De La Salle University
Armando Somintac ⋅ PH National Institute of Physics, University of the Philippines Diliman
Arnel Salvador ⋅ PH National Institute of Physics, University of the Philippines Diliman
Elmer Estacio ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

We report on the design and construction of a Terahertz Transmision Time- Domain Spectroscopy (THz-TTDS) setup using a fiber laser as excitation and the emission from bulk p-type InAs as a THz source. Results were compared with spectra obtained using mode-locked Ti:Sapphire Laser optical excitation. The detected THz bandwidth extends up to 1 THz for the fiber laser system while it was 1.5 THz for the Ti:Sapphire laser system. This is attributed to the shorter pulse width of the Ti:sapphire laser. As a further demonstration, the THz transmission spectra of silicon (Si) and porous silicon (Psi) were also measured using the fiber laser-based THz-TTDS setup. The presence of pores in Psi resulted in a higher THz bandwidth of Psi (0.8 THz) than the THz bandwidth of bulk silicon (0.5 THz). In summary, we have demonstrated the feasibility of a cost-effective and compact fiber laser- based THz-TTDS setup suitable for THz transmission spectroscopy.

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Issue

2014: Proceedings of the 32nd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP2014-1A-05

Section

Condensed Matter Physics

Published

2014-10-17

How to Cite

[1]

A De Los Reyes, SA Vizcara, JD Vasquez, MA Faustino, L Lopez, C Sadia, MH Balgos, R Jaculbia, J Muldera, C Que, GN Santos, A Somintac, A Salvador, and E Estacio, Development of a cost-effective and portable TeraHertz Time-Domain Spectroscopy setup in transmission geometry, Proceedings of the Samahang Pisika ng Pilipinas 32, SPP2014-1A-05 (2014). URL: https://proceedings.spp-online.org/article/view/1793.