Practical method to estimate the standard deviation in absorption coefficients measured with THz time-domain spectroscopy

OPTICS COMMUNICATIONS

卷:283

Article

Tripathi, Saroj R.¹  Aoki, Makoto¹  Mochizuki, Kento¹  Hosako, Iwao²  Asahi, Toshiaki³  Hiromoto, Norihisa¹ 

[1] Shizuoka Univ, Hamamatsu, Shizuoka 4328011, Japan

[2] Natl Inst Informat & Commun Technol, Koganei, Tokyo 1848795, Japan

[3] Nippon Min & Met Co Ltd, Toda, Saitama 3358502, Japan

关键词: Terahertz wave;    THz time-domain spectroscopy;    Optical constant;    Random error;   

DOI  :  10.1016/j.optcom.2010.02.008

来源: Elsevier

【 摘 要 】

A model of standard deviation in the intensity spectrum of electric field observed with the terahertz time-domain spectroscopy (THz-TDS) is proposed to estimate the random error in the transmittance and absorption coefficients from a single or a few measurements of a sample. The proposed standard deviation which is derived on the basis of the statistical standard deviation and noise floor of intensity spectrum of reference fits well to the standard deviation of transmittance as well as absorption coefficient computed statistically. This study contributes the simple and computationally efficient method to demonstrate the accuracy in optical constants like imaginary part of refractive index and absorption coefficients measured using the THz-TDS. (C) 2010 Elsevier B.V. All rights reserved.

【 授权许可】

Free