Temperature-dependent refractive indices of a 1mol % MgO-doped Stoichiometric LiTaO3 crystal at the THz frequency range

2014 ◽  
Author(s):  
Kyu-Sup Lee ◽  
Shunji Takekawa ◽  
Kenji Kitamura ◽  
Do-Kyeong Ko ◽  
Nan Ei Yu
Keyword(s):  
Refractive Indices ◽  
Frequency Range ◽  
Temperature Dependent

scholarly journals Temperature dependent poly(L-lactide) crystallization investigated by Fourier transform terahertz spectroscopy

2021 ◽  
Author(s):  
Seiichiro Ariyoshi ◽  
Satoshi Ohnishi ◽  
Hikaru Mikami ◽  
Hideto Tsuji ◽  
Yuki Arakawa ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Absorption Spectra ◽  
Terahertz Spectroscopy ◽  
Thz Spectroscopy ◽  
Frequency Range ◽  
Temperature Dependent ◽  
Thz Absorption

Poly(L-lactide) (PLLA) was investigated by Fourier transform terahertz (THz) spectroscopy over the frequency range of 1.0 – 8.5 THz. THz absorption spectra were acquired for PLLA samples isothermally crystallized at...

Temperature Dependent Raman Scattering in CsTiOAsO4 Single Crystal

1995 ◽  
Vol 398 ◽  
Author(s):  
A.R. Guo ◽  
C.-S. Tu ◽  
Ruiwu Tao ◽  
R.S. Katiyar ◽  
Ruyan Guo ◽  
...  
Keyword(s):  
Soft Mode ◽  
Low Frequency ◽  
High Mobility ◽  
Vibrational Modes ◽  
Frequency Range ◽  
Temperature Dependent ◽  
Higher Symmetry ◽  
Phonon Spectra ◽  
Symmetry Structure ◽  
Increasing Temperature

ABSTRACTThe longitudinal (LO) and transverse (TO) A1 vibrational modes have been measured between 30-1200 cm−1 as a function of temperature (30–1240 K) for CsTiOAsO4 (CTA). The frequencies for all corresponding Raman components shifted to lower frequencies on increasing the temperature, however, there is no typical soft-mode like behavior observed in the measured frequency range. The relative intensities of the low frequency bands increase dramatically with increasing temperature due to high mobility of Cs+ ion. A higher symmetry structure taking place above 940K has been confirmed by changes in the phonon spectra.

Temperature dependent dielectric relaxation of ionic liquid ([bmim][BF4])/alcohol binary mixtures

2017 ◽  
Vol 41 (17) ◽  
pp. 9330-9337 ◽  
Author(s):  
Man Yang ◽  
Liyan Ma ◽  
Kongshuang Zhao
Keyword(s):  
Ionic Liquid ◽  
Dielectric Relaxation ◽  
Binary Mixtures ◽  
Dielectric Spectroscopy ◽  
Spectroscopy Study ◽  
Frequency Range ◽  
Temperature Dependent

A dielectric spectroscopy study on the binary mixtures of the ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) and four kinds of alcohols as a function of temperature was carried out over a frequency range of 100 MHz to 20 GHz.

Temperature dependent dielectric spectroscopy of muscle tissue phantom

2020 ◽  
Vol 12 (9) ◽  
pp. 885-891
Author(s):  
Ondrej Fiser ◽  
Sebastian Ley ◽  
Marko Helbig ◽  
Jürgen Sachs ◽  
Michaela Kantova ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Muscle Tissue ◽  
Frequency Range ◽  
Temperature Dependent ◽  
Dielectric Parameters ◽  
Temperature Range ◽  
Non Invasive ◽  
Tissue Phantom ◽  
Cole Model ◽  
Polyethylene Powder

AbstractThe temperature dependence of the dielectric parameters of tissues and tissue-mimicking phantoms is very important for non-invasive temperature measurement in medical applications using microwaves. We performed measurements of this dependence in the temperature range of 25–50°C using distilled water as a reference liquid commonly used in dielectric property studies. The results were compared with the literature model in the frequency range of 150–3000 MHz. Using this method, the temperature dependence of dielectric parameters of a new muscle tissue-mimicking phantom based on agar, polyethylene powder, and polysaccharide material TX-151 was measured in the temperature range of 25–50°C. The temperature dependence of the dielectric properties of this new muscle phantom was fitted to that of the two-pole Cole–Cole model and the deviation of the results between measured and modeled data was quantified.

The Refractive Indices of Nematic Liquid Crystal 4'-n-pentyl-4-cyanobiphenyl in the THz Frequency Range

2004 ◽  
Vol 409 (1) ◽  
pp. 137-144 ◽  
Author(s):  
Ru-Pin Pan ◽  
Tsong-Ru Tsai ◽  
Chao-Yuan Chen ◽  
Chiung-Han Wang ◽  
Ci-Ling Pan
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Refractive Indices ◽  
Frequency Range

scholarly journals Ultra-Wideband Temperature Dependent Dielectric Spectroscopy of Porcine Tissue and Blood in the Microwave Frequency Range

Sensors ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1707 ◽  
Author(s):  
Sebastian Ley ◽  
Susanne Schilling ◽  
Ondrej Fiser ◽  
Jan Vrba ◽  
Jürgen Sachs ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Microwave Frequency ◽  
Ultra Wideband ◽  
Frequency Range ◽  
Temperature Dependent ◽  
Hyperthermia Treatment ◽  
Non Invasive ◽  
Animal Liver ◽  
Cole Model ◽  
Diagnostic Technologies

The knowledge of frequency and temperature dependent dielectric properties of tissue is essential to develop ultra-wideband diagnostic technologies, such as a non-invasive temperature monitoring system during hyperthermia treatment. To this end, we characterized the dielectric properties of animal liver, muscle, fat and blood in the microwave frequency range from 0.5 GHz to 7 GHz and in the temperature range between 30 °C and 50 °C. The measured data were modeled to a two-pole Cole-Cole model and a second-order polynomial was introduced to fit the Cole-Cole parameters as a function of temperature. The parametric model provides access to the dielectric properties of tissue at any frequency and temperature in the specified range.

Sign in / Sign up

Export Citation Format

Share Document