Abstract

Through terahertz time-domain spectroscopy, negative imaginary conductivity is observed in In-rich AlInN film grown by metal–organic chemical-vapor deposition for frequencies from 0.2to2.0THz. This non-Drude behavior is explained based on the electron back-scattering theory of Smith [Phys. Rev. B 65, 115206 (2002)] . Comparing with binary semiconductor InN, potential fluctuations produced by composition inhomogeneity and alloy scattering of carriers make In-rich AlInN alloy easier to be subjected to non-Drude behavior in electrical performance.

© 2009 Optical Society of America

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