Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 2002),
  • paper CTuK59

THz Near-invisible Materials: The Dielectric Properties of Polystyrene Foam

Not Accessible

Your library or personal account may give you access

Abstract

One of the problems still facing workers in the terahertz field, is to find suitable materials with a low refractive index and extinction, that can be used as filters or substrates. Here, we show results on THz-TDS measurements on polystyrene foam which demonstrate that this material has dielectric properties that make it very suitable for many THz applications. We have measured the frequency-dependent extinction and refractive index of three kinds of polystyrene foam: One produced with l-chloro-1, l-difluoroethane (also called HCFC 142b) as a blowing agent, and two with CO2 as the blowing agent. The experimental setup uses 15 fs pulses from a 72 MHz repetition- rate, Ti:Sapphire oscillator to generate THz pulses from a semi-large aperture SI-GaAs emitter. These are detected using electro-optic sampling in a 0.1 mm thick (110) oriented GaP crystal.1 We have studied three samples: Sample A (Styrodur 2500), is produced with HCFC 142 b as a blowing agent, whereas samples B (Styrodur 2500 C) and C (Styrodur 4000 CS) are blown with CO2. The samples differ mainly in their mass density, which is the highest for sample C. In Fig. 1 we plot an example of the measured THz waveforms obtained with and without polystyrene foam C in the focus of the THz beam.

© 2002 Optical Society of America

PDF Article
More Like This
THz dielectric properties of sol-gel material for bioencapsulation

Haibo Liu, Jingzhou Xu, Moo-Yeal Lee, Ravi Janumpally, Jonathan Dordick, and X.-C. Zhang
CTuM46 Conference on Lasers and Electro-Optics (CLEO:S&I) 2003

Electro-optic Detection of Sub-Wavelength THz Spot Sizes in the Near-Field of a Metal Tip

N. C. J. van der Valk, W. Th. Wenckebach, and P. C. M. Planken
PD3 International Conference on Ultrafast Phenomena (UP) 2002

Low-temperature THz Imaging for High-temperature Superconductor Thin-film Analysis

M. Brucherscifer, A. Meltzow-Altmeyer, C. Janke, P. Haring Bolivar, and H. Kurz
QThG22 Quantum Electronics and Laser Science Conference (CLEO:FS) 2002

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved