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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/52099


    Title: Roles of Dislocation Density to the Scattering of Nano-acoustic Waves in GaN
    Authors: Liu,TM;Sun,SZ;Chang,CF;Chen,GT;Pan,CC;Chyi,JI;Sun,CK
    Contributors: 電機工程學系
    Date: 2011
    Issue Date: 2012-03-28 10:15:25 (UTC+8)
    Publisher: 國立中央大學
    Abstract: We have investigated how the density of threading dislocations in GaN affects the decay of the intensity of nano-acoustic waves. We carried out measurements using a reflection-type femtosecond pump probe, and thus, we determined the local dislocation density from the lifetime of nano-acoustic waves. We found that for a dislocation density of 10(8) cm(-2), defect scattering will surmount other scattering mechanisms and dominate the attenuation of 100GHz acoustic phonons.
    Relation: CHINESE JOURNAL OF PHYSICS
    Appears in Collections:[電機工程學系] 期刊論文

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