Title :
THz time-domain spectroscopy of nonpolar liquids
Author :
Pedersen, J.E. ; Keiding, S.R.
Author_Institution :
Fysisk Inst., Odense Univ., Denmark
fDate :
10/1/1992 12:00:00 AM
Abstract :
A newly developed terahertz time-domain spectrometer based on photoconductive dipole antennas driven by femtosecond laser pulses was used to measure the absorption and index of refraction for benzene, carbon tetrachloride, and cyclohexane in the far infrared. The spectra cover the region of 3-66 cm-1, where the dielectric response of the nonpolar liquids is dominated by collision induced dipole moments. With terahertz time-domain spectroscopy, information on both the real and imaginary part of the frequency response is obtained in a range difficult to access by standard techniques
Keywords :
infrared spectra of organic molecules and substances; infrared spectroscopy; organic compounds; refractive index; submillimetre wave devices; 3 to 66 cm-1; FIR; THz time-domain spectroscopy; absorption; benzene; carbon tetrachloride; collision induced dipole moments; cyclohexane; dielectric response; far infrared; femtosecond laser pulses; frequency response; index of refraction; nonpolar liquids; photoconductive dipole antennas; terahertz time-domain spectrometer; Antenna measurements; Dielectric measurements; Dipole antennas; Liquids; Optical pulses; Photoconductivity; Pulse measurements; Spectroscopy; Submillimeter wave measurements; Time domain analysis;
Journal_Title :
Quantum Electronics, IEEE Journal of
