Observation of spurious spectral features in mixed-powder compressed pellets measured by terahertz time-domain spectroscopy
نویسندگان
چکیده
Spurious loss features were observed in mixed-powder compressed pellets measured transmission using terahertz time-domain spectroscopy. Loss identified two types of pellets: PTFE-glass microspheres and PTFE-lactose. The found to be dependent on grain size concentration. An explanation is proposed, based varying optical thickness the sample material.
منابع مشابه
Terahertz Spectra of Explosives Measured by Optical Parametric Oscillator-Based System and Time Domain Spectroscopy
In this paper, we report on measurements of absorption spectra of hexogen, penthrite, and octogen. The measurements were carried out by means of time domain spectroscopy and compared to spectra obtained from a setup, which bases on an optical parametric oscillator combined with a Golay cell. For time domain spectroscopy measurement, Teraview TPS 3000 unit with accessories in transmission con gu...
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 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 کاملTHz Reflection Spectroscopy of Explosives Measured by Time Domain Spectroscopy
Terahertz range of electromagnetic spectrum (0.1 ÷ 10) THz has focused attention of scientists for years because of many interesting features including existence of spectral fingerprints of many materials (also explosives), through clothing imaging and safety for human being. Such advantages are of great importance for biochemical, defense and security related applications. Scanning of pure exp...
متن کاملUncertainty in terahertz time-domain spectroscopy measurement
Measurements of optical constants at terahertz—or T-ray—frequencies have been performed extensively using terahertz time-domain spectroscopy (THz-TDS). Spectrometers, together with physical models explaining the interaction between a sample and T-ray radiation, are progressively being developed. Nevertheless, measurement errors in the optical constants, so far, have not been systematically anal...
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: IEEE Transactions on Terahertz Science and Technology
سال: 2023
ISSN: ['2156-342X', '2156-3446']
DOI: https://doi.org/10.1109/tthz.2023.3290118