Title :
An investigation of beam focusing perturbations in THz spectroscopy measurements
Author :
Stringer, M.R. ; Naftaly, M. ; Marakgos, N. ; Miles, R.E. ; Linfield, E. ; Davies, A.G.
Author_Institution :
Sch. of Electron. & Electr. Eng., Leeds Univ., UK
Abstract :
We present evidence that THz spectroscopy measurements performed using a focused beam result in an increase of calculated sample refractive index, compared to that measured under plane wave conditions. No significant differences were found in sample absorption properties.
Keywords :
optical focusing; refractive index measurement; submillimetre wave measurement; submillimetre wave spectroscopy; THz spectroscopy measurements; beam focusing perturbations; plane wave conditions; refractive index; sample absorption properties; Absorption; Focusing; Frequency measurement; Laser beams; Optical pumping; Optical refraction; Optical variables control; Performance evaluation; Refractive index; Spectroscopy;
Conference_Titel :
Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005. IRMMW-THz 2005. The Joint 30th International Conference on
Print_ISBN :
0-7803-9348-1
DOI :
10.1109/ICIMW.2005.1572592
