Abstract
α-V2O5 (001) thin films were fabricated by reactive magnetron sputtering. The effects of the deposition temperature as well as the oxygen flux on the crystal structure, surface morphology and terahertz property were studied. The formation of vanadyl oxygen defect leads to a transient charge distribution that forms THz radiating dipoles in α-V2O5(001) surface. THz properties are closely related with the thermally reduced surface of α-V2O5 (001) films. Dynamics of the formation of surface oxygen vacancies accompanied with VO6 octahedral distortion is the key to understand the THz luminescence from the thermally reduced surface of V2O5.
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