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

Authors

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

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.