Title :
Understanding the influence of morphology on the terahertz spectra of a powdered ionic crystalline system
Author :
Burnett, A.D. ; Kendrick, John ; Russell, Craig ; Christensen, J. ; Lianhe Li ; Cunningham, John E. ; Pearson, Arwen R. ; Linfield, Edmund H. ; Davies, A. Giles
Author_Institution :
Astbury Centre for Struct. Mol. Biol., Univ. of Leeds, Leeds, UK
Abstract :
We show that the terahertz (THz) frequency spectra of powdered ionic crystalline systems are not described by their infrared active phonon modes alone. Instead, it is necessary to include the coupling of the phonon modes with the macroscopic electric field generated by the collective displacement of the vibrating ions.
Keywords :
organic compounds; phonons; terahertz wave spectra; TMAB; infrared active phonon modes; macroscopic electric field; morphology; powdered ionic crystalline system; terahertz frequency spectra; tetramethylammonium bromide; vibrating ions; Absorption; Crystals; Educational institutions; Electric fields; Morphology; Phonons; Shape;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665919
