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Calibration independent estimation of optical constants using terahertz time‐domain spectroscopy
Author(s) -
Singh Surya Prakash,
Akhter Zubair,
Akhtar M. J.
Publication year - 2015
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29207
Subject(s) - calibration , terahertz radiation , microwave , reflection (computer programming) , optics , transmission (telecommunications) , materials science , spectroscopy , time domain , gallium arsenide , optoelectronics , physics , mathematics , computer science , telecommunications , statistics , quantum mechanics , computer vision , programming language
A novel calibration independent technique that simultaneously determines the optical constants and material thickness with high accuracy, using the transmission and the reflection measurements, is proposed. A generalized closed form expression is derived to calculate the optical constants in terms of the measured transmitted and the reflected signals. The proposed measurement technique is noniterative, self‐calibrated, and independent of prior knowledge of the sample thickness. To validate the proposed technique, two different samples, viz., Gallium arsenide and Silicon, are considered during the numerical simulation. The result shows that the proposed technique provides highly accurate material parameters over a broad frequency domain and also recovers the information of the material thickness. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1861–1864, 2015