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Title: An analysis of temperature dependent piezoelectric Franz-Keldysh effect in AlGaN
Authors: Hou, Y.T. 
Teo, K.L. 
Li, M.F. 
Uchida, K.
Tokunaga, H.
Akutsu, N.
Matsumoto, K.
Issue Date: 21-Feb-2000
Citation: Hou, Y.T.,Teo, K.L.,Li, M.F.,Uchida, K.,Tokunaga, H.,Akutsu, N.,Matsumoto, K. (2000-02-21). An analysis of temperature dependent piezoelectric Franz-Keldysh effect in AlGaN. Applied Physics Letters 76 (8) : 1033-1035. ScholarBank@NUS Repository.
Abstract: Strong Franz-Keldysh oscillations near the band gap of AlGaN are observed in the contactless electroreflectance (CER) studies of a GaN/InGaN/AlGaN multilayer structure. The line shape analysis of the CER spectra at different temperatures provides an accurate determination of the AlGaN band gap energies and the built-in electric fields. Using the existing data of the thermal expansion coefficients of GaN and sapphire, and the piezoelectric constants of AIGaN, the temperature dependence of the electric field is estimated and is in good agreement with the experimental results between 15 and 300 K. We attribute such electric field to the piezoelectric strain effect. © 2000 American Institute of Physics.
Source Title: Applied Physics Letters
ISSN: 00036951
Appears in Collections:Staff Publications

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