Investigation of Ag2O Thermal Decomposition by Terahertz Time-Domain Spectroscopy
CHEN Hua1,2, WANG Li2
1Department of Physics, Southeast University, Nanjing 2111892Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100190
Investigation of Ag2O Thermal Decomposition by Terahertz Time-Domain Spectroscopy
CHEN Hua1,2, WANG Li2
1Department of Physics, Southeast University, Nanjing 2111892Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100190
摘要Application of terahertz time-domain spectroscopy is demonstrated to study the process of Ag2O thermal decomposition. In the process of decomposition, the time-resolved signals are characterized by broad oscillations and decreased intensity, and THz pulse essentially contains two broad spectral components: one centered at around 0.35THz and a band with a maximum at around 0.81THz shift to 0.71THz. Optical absorption spectra of different specimens are studied in the frequency range 0.3-1.4THz and the data are analyzed by the relevant theory of the effective medium approach combined with the Drude-Lorentz model. The analysis suggests that optical properties stem from the Drude term for the metallic phase and the Lorentz term for the insulator phase in the complex system.
Abstract：Application of terahertz time-domain spectroscopy is demonstrated to study the process of Ag2O thermal decomposition. In the process of decomposition, the time-resolved signals are characterized by broad oscillations and decreased intensity, and THz pulse essentially contains two broad spectral components: one centered at around 0.35THz and a band with a maximum at around 0.81THz shift to 0.71THz. Optical absorption spectra of different specimens are studied in the frequency range 0.3-1.4THz and the data are analyzed by the relevant theory of the effective medium approach combined with the Drude-Lorentz model. The analysis suggests that optical properties stem from the Drude term for the metallic phase and the Lorentz term for the insulator phase in the complex system.
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2009, Vol. 26 
