Journal ArticleDOI
A reliable method for extraction of material parameters in terahertz time-domain spectroscopy
Reads0
Chats0
TLDR
In this article, a novel method for fast and reliable extraction of material parameters in terahertz time-domain spectroscopy was proposed, which could be applied for most materials and requires neither simplifying assumptions nor samples of different thickness for the extraction.Abstract:
This paper introduces a novel method that allows fast and reliable extraction of material parameters in terahertz time-domain spectroscopy. This method could be applied for most materials and requires neither simplifying assumptions nor samples of different thickness for the extraction. The presented extraction procedure operates either on truncated terahertz signals when temporal windowing is possible, or on full ones otherwise. Some experimental examples covering all practical cases are given. In particular, the extraction procedure treats the tedious case of samples for which internal reflections of the terahertz pulse slightly overlap.read more
Citations
More filters
Journal ArticleDOI
Terahertz spectroscopy and imaging – Modern techniques and applications
TL;DR: The terahertz time-domain spectroscopy (THz-TDS) as discussed by the authors is a new spectroscopic technique based on coherent and time-resolved detection of the electric field of ultrashort radiation bursts.
Journal ArticleDOI
Carrier dynamics in semiconductors studied with time-resolved terahertz spectroscopy
TL;DR: In this article, a review of the application of terahertz time-domain spectroscopy to bulk and nanostructured semiconductors is presented, where the authors present a pump-probe scheme to monitor the nonequilibrium time evolution of carriers and low energy excitations with sub-ps time resolution.
Journal ArticleDOI
Material parameter estimation with terahertz time-domain spectroscopy
TL;DR: This paper describes a robust algorithm for extracting material parameters from measured terahertz waveforms that simultaneously obtains both the thickness and the complex refractive index of an unknown sample under certain conditions.
Journal ArticleDOI
A terahertz metamaterial with unnaturally high refractive index
Muhan Choi,Seunghoon Lee,Yushin Kim,Seung Beom Kang,Jonghwa Shin,Min Hwan Kwak,Kwang-Young Kang,Yong-Hee Lee,Namkyoo Park,Bumki Min +9 more
TL;DR: It is demonstrated that a broadband, extremely high index of refraction can be realized from large-area, free-standing, flexible terahertz metamaterials composed of strongly coupled unit cells.
Journal ArticleDOI
Highly precise determination of optical constants and sample thickness in terahertz time-domain spectroscopy
TL;DR: This method could be applied to any material with moderate absorption and requires only two measurements of the temporal profile of the terahertz pulses: a reference one without the sample and one transmitted through the sample.
References
More filters
Journal ArticleDOI
Far-infrared time-domain spectroscopy with terahertz beams of dielectrics and semiconductors
TL;DR: In this paper, the authors measured the far-infrared absorption and dispersion from 0.2 to 2 THz of the crystalline dielectrics sapphire and quartz, fused silica, and the semiconductors silicon, gallium arsenide, and germanium.
Journal ArticleDOI
Characterization of an optoelectronic terahertz beam system
TL;DR: In this article, the performance of an optoelectronic terahertz (THz) beam system was described, where the transmitter operation was based on the repetitive, sub-picosecond laser excitation of a Hertzian dipole antenna embedded in a charged coplanar line.
Journal ArticleDOI
Optical and electronic properties of doped silicon from 0.1 to 2 THz
TL;DR: Using a source of freely propagating subpicosecond pulses of THz radiation, this article measured the absorption and dispersion of both N and P-type, 1 Ω cm silicon from 0.1 to 2 THz.
Journal ArticleDOI
THz time-domain spectroscopy of nonpolar liquids
J. E. Pedersen,Søren Rud Keiding +1 more
TL;DR: In this article, a terahertz time-domain spectrometer based on photoconductive dipole antennas driven by femtosecond laser pulses was used to measure the absorption and index of refraction for benzene, carbon tetrachloride, and cyclohexane in the far infrared.
Journal ArticleDOI
Radiation patterns from lens-coupled terahertz antennas
TL;DR: Good agreement between theory and experiment is obtained, and it is found that the terahertz beam can be represented by a Gaussian beam emitted from a circular aperture equal to the diameter of the lens.