Abstract-Birefringence measurement in the terahertz range based on double Fourier analysis

Federico Sanjuan, Alexander Bockelt, and Borja Vidal  »View Author Affiliations

Optics Letters, Vol. 39, Issue 4, pp. 809-812 (2014)
http://dx.doi.org/10.1364/OL.39.000809

http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-39-4-809

A method for obtaining the average refractive indexes of a birefringent material in the terahertz region in a single measurement with a standard terahertz time-domain spectrometer is presented. The method is based on processing the frequency-domain interference between terahertz pulses and echoes through the Fourier transform of the terahertz spectrum. The technique also allows the determination of the optical axis orientation of the material by making two measurements with different angles of the sample optical axis.

© 2014 Optical Society of America