Title :
Terahertz transmission spectroscopic analysis of mono- and di-substituted hydroxynaphthalenes in the 0.5- to 6- THz region using GaP THz wave generator
Author :
Ponseca, C.S., Jr. ; Quema, A.V. ; De Los Reyes, G. ; Estacio, Elmer ; Cadatal, M.M. ; Pobre, R. ; Quiroga, R. ; Murakami, H. ; Ono, S. ; Sarukura, N. ; Tanno, T. ; Sasaki, T. ; Suto, K. ; Nishizawa, J. ; Tominaga, K.
Author_Institution :
Inst. for Molecular Sci., Okazaki
Abstract :
We report the room temperature terahaertz (THz) transmission spectroscopy measurements of mono-and di-substituted hydroxynaphthalenes in the 0.5-to 6-THz region using a GaP THz wave generator. Several absorption peaks were observed and ascribed to be the fundamental vibrational modes of each of the isomers which were also validated by ab initio calculations. The absorption peak at 4 THz is attributed to the twisting of the 1,4-naphthol about its longer axis while the absorption peak at 5 THz is due to the butterfly motion of the naphthol about its shorter axis.
Keywords :
ab initio calculations; absorption; gallium compounds; spectra; spectroscopy; submillimetre wave generation; GaP; GaP THz wave generator; ab initio calculation; absorption peak; disubstituted hydroxynaphthalenes; frequency 4 THz; frequency 5 THz; monosubstituted hydroxynaphthalenes; terahertz transmission spectroscopic analysis; transmission spectroscopy measurement; Absorption; Biological materials; Cities and towns; Frequency; Laser theory; Material properties; Semiconductor lasers; Spectroscopy; Submillimeter wave measurements; Temperature;
Conference_Titel :
Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics, 2006. IRMMW-THz 2006. Joint 31st International Conference on
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0400-2
Electronic_ISBN :
1-4244-0400-2
DOI :
10.1109/ICIMW.2006.368748
