TY - JOUR
T1 - Terahertz time-domain polarimetry (THz-TDP) based on the spinning E-O sampling technique
T2 - Determination of precision and calibration
AU - Xu, Kuangyi
AU - Bayati, Elyas
AU - Oguchi, Kenichi
AU - Watanabe, Shinichi
AU - Winebrenner, Dale P.
AU - Hassan Arbab, M.
N1 - Funding Information:
K.O. thanks for Keio University Research Grant for Young Researcher’s Program.
Funding Information:
National Science Foundation (ECCS-1407683); National Institute of General Medical Sciences (R01GM112693). K.O. thanks for Keio University Research Grant for Young Researcher?s Program.
Publisher Copyright:
© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
PY - 2020/4/27
Y1 - 2020/4/27
N2 - We have developed a terahertz time-domain polarimetry (THz-TDP) system by applying frequency modulation to electro-optic sampling detection in a nonlinear crystal. We characterized the precision of this system in determining the polarization angles to be 1.3° for fixed time delay, and 0.5° for complete time-domain waveform. Furthermore, we calculated the Jones matrix of the optical components used for beam propagation to calibrate the induced systematic error. The advantages of employing this calibration approach are demonstrated on a sapphire crystal investigated at different sample test positions in transmission configuration, and using high resistivity Si, AlN and quartz in reflection geometry. The new THz-TDP technique has the advantage of not using any external polarizers, and therefore is not constrained by their optical performance limitations, such as restricted bandwidths and frequency-dependent extinction ratio. Finally, the THz-TDP technique can be easily implemented on existing time-domain spectroscopy (TDS) systems.
AB - We have developed a terahertz time-domain polarimetry (THz-TDP) system by applying frequency modulation to electro-optic sampling detection in a nonlinear crystal. We characterized the precision of this system in determining the polarization angles to be 1.3° for fixed time delay, and 0.5° for complete time-domain waveform. Furthermore, we calculated the Jones matrix of the optical components used for beam propagation to calibrate the induced systematic error. The advantages of employing this calibration approach are demonstrated on a sapphire crystal investigated at different sample test positions in transmission configuration, and using high resistivity Si, AlN and quartz in reflection geometry. The new THz-TDP technique has the advantage of not using any external polarizers, and therefore is not constrained by their optical performance limitations, such as restricted bandwidths and frequency-dependent extinction ratio. Finally, the THz-TDP technique can be easily implemented on existing time-domain spectroscopy (TDS) systems.
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U2 - 10.1364/OE.389651
DO - 10.1364/OE.389651
M3 - Article
C2 - 32403822
AN - SCOPUS:85084397179
SN - 1094-4087
VL - 28
SP - 13482
EP - 13496
JO - Optics Express
JF - Optics Express
IS - 9
ER -