Calibration method to improve the accuracy of THz imaging and spectroscopy in reflection geometry

• DOI: 10.1364/prj.4.000a29
• Publication Date: 2016-05-26T21:26:06Z
• Authors: Shuting Fan; Edward P. J. Parrott; Benjamin S. Y. Ung; Emma Pickwell-Mac...
• Keywords: 2. Zero hunger; 0103 physical sciences; 02 engineering and technology; 0210 nano-technology; 01 natural sciences

We introduce a novel method to accurately extract the optical parameters in terahertz reflection imaging. Our method builds on standard self-referencing methods using the reflected signal from the bottom of the imaging window material to further compensate for time-dependent system fluctuations and position-dependent variation in the window thickness. Our proposed method not only improves the accuracy, but also simplifies the imaging procedure and reduces measurement times.