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用拉曼散射谱与远红外反射谱研究Ga_xIn_1-xAs_ySb_1-y四元混晶的长波光学声子

INVESTIGATION OF LONG-WAVELENGTH OPTICAL- PHONONS IN Ga_xIn_1-xAs_ySb_1-y QUATERNARY MIXED CRYSTAL BY RAMAN SCATTERING SPECTROSCOPIES AND FIR REFLECTION SPECTRA

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【Author】 LIANG Bang Li 1,2) JIANG Chun Ping 3) XIA Guan Qun 1) FAN Shu Ping 2) CHU Jun Hao 3) ( 1) National Laboratory of Solid Devices and Systems, Shanghai Institute of Metallrygy, Chinese Academy of Sciences, Shanghai 20

【机构】中国科学院上海冶金研究所国家固体元器件与系统实验室!上海； 200050；苏州大学物理系；江苏；苏州； 215006；中国科学院上海技术物理研究所红外物理国家重点实验室!上海； 200083；江苏!苏州；中；

【摘要】报道了 MBE外延生长的 Gax In1 - x Asy Sb1 - y四元混晶的拉曼散射谱与远红外反射谱 ,并从拉曼散射谱中观察到了 Gax In1 - x Asy Sb1 - y四元混晶的晶格振动四模行为 ;从实验中还观察到低于 180 cm- 1的若干散射峰 ,提出它们可能是与次近邻原子间相互作用的晶格振动模式有关 ;从拉曼散射谱和红外反射谱中观察到了与 Gax In1 - xAsy Sb1 - y四元混晶多声子吸收过程的有关的现象更多还原

【Abstract】 The long wavelength optical phonons in Ga x In 1- x As y Sb 1- y MBE epitaxial layers were investigated by Raman scattering spectroscopies and FIR reflection spectra. The four mode behavior and modes below 180cm -1 related with the interaction between the third nearest atoms in Ga x In 1- x As y Sb 1- y quaternary mixed crystals were observed from the Raman data, and the related phenomenon possibly arising from the multi phonon absorption process was observed from the FIR and Raman data.更多还原