Nanoindentation C-&A-oriented GaN thin films Indentation stress 整理成 FIB fab. C-&A-oriented GaN pillars Indentation strain 公式參考 JAP 101 (2007) 083522 PRB 77 (2008) 060103 (不同直徑) 除了機械性質的比較之外,可能可以探討:尺寸與幾何效應。
compression Optical tests—ex: PL, CL, Raman..etc 比較前後 If peak is shifted.. defect/dislocation induced ?!..or.. blue/red shift ?!.. intensity decay ?!..dep. on strain rate ?! maybe some relations can be explained these ?! 比較前後 NEED TEM analysis 進一步用TEM分析來找到合理的解釋。 How differences exhibit in C-&A-oriented GaN materials ?