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Ivan Cedrick Malaluan Verona
National Institute of Physics, University of the Philippines Diliman, Philippines
Astronomy Earth & Planetary Sciences Materials Science & Nanotechnology Physics

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Terahertz Quasi-Time Domain Spectroscopy using a 808nm multimode diode laser Ivan Cedrick Malaluan Verona; Alexander De los Reyes; Hannah Bardolaza; Elmer Estacio
Journal of Physics and Its Applications Vol 5, No 2 (2023): May 2023
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v5i2.17945

Abstract

We report on a terahertz quasi-time domain spectroscopy (QTDS) system based on a low-cost continuous wave multimode diode laser. Commercially available low-temperature grown gallium arsenide (LT-GaAs) based photoconductive antennas (PCAs) with spiral and dipole configurations were used as emitter and detector, respectively. Terahertz pulses spaced at approximately 55 ps with a bandwidth of 400 GHz were obtained. Parametric measurements of the terahertz peak-to-peak intensity were performed by varying the injection current and temperature while maintaining incident laser power. The highest peak-to-peak intensity was obtained at 170mA injection current and 20° C temperature settings. The change in the THz peak-to-peak intensity is attributed to the mode hopping characteristics of the device which in turn, is dependent on injection current and temperature.
Co-Authors Alexander De los Reyes Elmer Estacio Hannah Bardolaza