Title :
Learning new chemistry and physics with THz light
Author :
Schmuttenmaer, Charles A.
Author_Institution :
Dept. of Chem., Yale Univ., New Haven, CT, USA
Abstract :
"Terahertz spectroscopy" emerged about 16 years ago with the demonstration that nearly single cycle pulses of far-infrared (FIR) radiation could be generated, sent through free space, and subsequently detected in the time-domain. Since then, THz spectroscopy has become an active area with studies ranging from condensed matter physics to gas-phase spectroscopy to biomedical imaging. This paper describes optical pump - THz probe measurements of transient photoconductivity in CdSe quantum dots, and transient photoconductivity in colloidal nanocrystalline TiO2. THz emission experiments of ultrafast demagnetization experiments are described as well.
Keywords :
II-VI semiconductors; cadmium compounds; electric variables measurement; infrared spectroscopy; measurement by laser beam; nanostructured materials; optical pumping; photoconductivity; semiconductor quantum dots; submillimetre wave measurement; submillimetre wave spectroscopy; titanium compounds; THz probe measurement; TiO2; biomedical imaging; condensed matter physics; far-infrared radiation; gas-phase spectroscopy; optical pumps; quantum dots; single cycle pulses; terahertz spectroscopy; transient photoconductivity; Biomedical optical imaging; Chemistry; Finite impulse response filter; Optical pulse generation; Photoconductivity; Physics; Radiation detectors; Spectroscopy; Stimulated emission; Time domain analysis;
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.2005.1572582
