Principles and Applications of THz Time Domain Spectroscopy

Roux, Jean‐François; Garet, Frédéric; Coutaz, J.-L.

doi:10.1007/978-94-007-3837-9_8

Cited by 11 publications

(4 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The THz absorption coefficient αν ðÞand refractive index n ν ðÞof the glass samples at the frequency ν are determined by using the following equations [12,[26][27][28];…”

Section: Thz Characterization and Analysis Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

Systematic Characterization of High-Dielectric Constant Glass Materials Using THz-TDS Technique

Wada¹,

Doddoji²,

Yang³

et al. 2023

Trends in Terahertz Technology

View full text Add to dashboard Cite

High-dielectric constant glasses are prerequisite for developing terahertz (THz) components and systems. Oxyfluorosilicate (OFS) glasses have been developed and their THz properties have been characterized by using THz-time domain spectroscopy (THz-TDS) measurements. High-dielectric constant (8–13) and low loss (6–9/cm) properties in the THz region have been demonstrated and their dielectric properties have been studied using the single oscillator-based model through a comparison with other multi-component silicate oxide glasses. Unified single oscillator model, which can distinguish the electronic and ionic contributions to the dielectric property, has been applied in this analysis. The physical origin of the dielectric constant enhancement and the importance of interplay between the electronic polarizability and ionicity in high-dielectric constant glasses have been revealed. This study has demonstrated the usefulness of THz-TDS technique for characterizing dielectric properties of multi-component glasses in detail.

show abstract

“…The THz absorption coefficient αν ðÞand refractive index n ν ðÞof the glass samples at the frequency ν are determined by using the following equations [12,[26][27][28];…”

Section: Thz Characterization and Analysis Techniquesmentioning

confidence: 99%

“…This indicates that 22)- (24), and plots in (b) and (d) show measured ε s and ω T =ω 0 evaluated from measured ε s and ε ∞ values using Eqs. ( 25)- (28). (ref.…”

Section: Comparison Between Theory and Experimentsmentioning

confidence: 99%

Systematic Characterization of High-Dielectric Constant Glass Materials Using THz-TDS Technique

Wada¹,

Doddoji²,

Yang³

et al. 2023

Trends in Terahertz Technology

View full text Add to dashboard Cite

show abstract

“…Presently, the THz-TDS in the 0.1-10 THz (3.33 cm À1 -333 cm À1 ) region is the most popular technique, which has been extensively applied in the fields of research in chemistry, materials science, physics, engineering, medicine as well as in industry [60][61][62][63][64][65][66][67][68][69][70][71][72][73][74]. THz -TDS has also been proved to be a valuable technique for investigation of low frequency dielectric relaxation and vibrational spectroscopy of hydrogen bonded liquids, such as water, alcohols, and others [75][76][77].…”

Section: Thz Transmission or Absorption Spectroscopymentioning

confidence: 99%

Probing Biological Water Using Terahertz Absorption Spectroscopy

Mitra¹,

Palit²

2022

Terahertz Technology

View full text Add to dashboard Cite

Hydrogen bonding properties of water molecules, which are confined in microcavities of biological interfaces, are significantly different from those of bulk water and drive most of the complex biological processes. While NMR, X-ray and UV–vis-IR spectroscopic techniques have been found inadequate for describing the dynamics of the thick (20–40 Å) sheath of hydration layer around biomolecules, recently developed THz spectroscopy has emerged as a powerful technique to directly probe the collective dynamics of hydrogen bonds in the hydration layer, which control all important functions of the biomolecules in life. Both laser and accelerator-based THz sources are intense enough to penetrate up to about 100 μm thick water samples, which makes THz transmission and/or dielectric relaxation measurements possible in aqueous solutions. These measurements provide valuable information about the rattling and rotational motions of hydrated ions, making, breaking and rearrangement of hydrogen bonds in hydration layer as well as hydrophilic and hydrophobic interactions between biomolecule and water. THz spectroscopy has also been successfully applied to study the effect of modulation of the physical conditions, like temperature, pH, concentration of proteins and chemical additives, on the structure and dynamics of hydration layer. THz spectroscopy has also been applied to study the processes of denaturation, unfolding and aggregation of biomolecules.

show abstract

“…Detailed description of the theory of terahertz spectroscopy and instrumentation can be found in numerous earlier studies and reviews [94][95][96][97][98]. Physics and application of terahertz radiation are described in detail by Roux et al [99], including characteristics and performances of a classical set-up, and explanations of the extraction of the refractive index and absorption coefficient from transmission or reflection measurements.…”

Section: Basic Concept and Instrumentationmentioning

confidence: 99%