Softening of infrared-active mode of perovskite BaZrO3 proved by terahertz time-domain spectroscopy
نویسندگان
چکیده
منابع مشابه
Far-infrared terahertz time-domain spectroscopy of flames.
We present what is to our knowledge the first comprehensive far-infrared absorption measurement of flames. These measurements, covering the region of 7-88 wave numbers (0.2-2.65 THz) are only now made possible by the technique of terahertz time-domain spectroscopy. We observe a large number of absorption lines-including those of water, CH, and NH(3)-in a stationary, premixed, propane-air flame....
متن کاملMaterial thickness optimization for transmission-mode terahertz time-domain spectroscopy.
The thickness of a sample material for a transmission-mode terahertz time-domain spectroscopy (THz-TDS) measurement is the subject of interest in this paper. A sample that is too thick or too thin can raise the problem of measurement uncertainty. Although greater thickness allows the terahertz radiation--or T-rays--to interact more with bulk material, the SNR rolls off with thickness due to sig...
متن کاملTransmission features of frequency-selective components in the far infrared determined by terahertz time-domain spectroscopy.
Transmission and phase-shift characteristics of dichroic high-pass filters with cutoff frequencies as high as 1.11 THz and of a cross-shaped grid bandpass filter with a resonance frequency of 280 GHz were measured with an electro-optic sampling terahertz time-domain spectrometer operating between 0.1 and 2 THz. Good agreement with transmission theories is found. We also compare the transmission...
متن کاملFar-infrared characteristics of ZnS nanoparticles measured by terahertz time-domain spectroscopy.
The optical and dielectric properties of ZnS nanoparticles are studied by use of terahertz time-domain spectroscopy (THz-TDS) over the frequency range from 0.3 to 3.0 THz. The effective medium approach combined with the pseudo-harmonic model of the dielectric response, where nanoparticles are embedded in the host medium, provides a good fit on the experimental results. The extrapolation of the ...
متن کاملTerahertz study of 1,3,5-trinitro-s-triazine by time-domain and Fourier transform infrared spectroscopy
This letter describes the use of THz time-domain spectroscopy (TDS) applied in transmission to the secondary explosive 1,3,5 trinitro-s-triazine. Samples were also subjected to Fourier transform infrared spectroscopy over the same range for comparison. A detailed spectroscopy study is presented. General agreement between results from both methods confirms the absorption features found. A compar...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 2015
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.4919913