中国物理B ›› 2016, Vol. 25 ›› Issue (6): 66301-066301.doi: 10.1088/1674-1056/25/6/066301

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Bismuth-content-dependent polarized Raman spectrum of InPBi alloy

Guan-Nan Wei(魏冠男), Qing-Hai Tan(谭青海), Xing Dai(戴兴), Qi Feng(冯琦), Wen-Gang Luo(骆文刚), Yu Sheng(盛宇), Kai Wang(王凯), Wen-Wu Pan(潘文武), Li-Yao Zhang(张立瑶), Shu-Min Wang(王庶民), Kai-You Wang(王开友)   

  1. 1 State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
    2 State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
  • 收稿日期:2016-01-28 修回日期:2016-03-07 出版日期:2016-06-05 发布日期:2016-06-05
  • 通讯作者: Kai-You Wang E-mail:kywang@semi.ac.cn
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant No. 2014CB643903) and the National Natural Science Foundation of China (Grant Nos. 61225021, 11474272, and 11174272).

Bismuth-content-dependent polarized Raman spectrum of InPBi alloy

Guan-Nan Wei(魏冠男)1, Qing-Hai Tan(谭青海)1, Xing Dai(戴兴)1, Qi Feng(冯琦)1, Wen-Gang Luo(骆文刚)1, Yu Sheng(盛宇)1, Kai Wang(王凯)2, Wen-Wu Pan(潘文武)2, Li-Yao Zhang(张立瑶)2, Shu-Min Wang(王庶民)2, Kai-You Wang(王开友)1   

  1. 1 State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
    2 State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2016-01-28 Revised:2016-03-07 Online:2016-06-05 Published:2016-06-05
  • Contact: Kai-You Wang E-mail:kywang@semi.ac.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant No. 2014CB643903) and the National Natural Science Foundation of China (Grant Nos. 61225021, 11474272, and 11174272).

摘要:

We systematically investigate the optical properties of the InP1-xBix ternary alloys with 0≤ x≤ 2.46%, by using high resolution polarized Raman scattering measurement. Both InP-like and InBi-like optical vibration modes (LO) are identified in all the samples, suggesting that most of the Bi-atoms are incorporated into the lattice sites to substitute P-atoms. And the intensity of the InBi-like Raman mode is positively proportional to the Bi-content. Linear red-shift of the InP-like longitudinal optical vibration mode is observed to be 1.1 cm-1/Bi%, while that of the InP-like optical vibration overtone (2LO) is nearly doubled. In addition, through comparing the Z(XX)Z and Z(XY)Z Raman spectra, longitudinal-optical-plasmon-coupled (LOPC) modes are identified in all the samples, and their intensities are found to be proportional to the electron concentrations.

关键词: InPBi, Raman spectra, red-shift, LOPC modes

Abstract:

We systematically investigate the optical properties of the InP1-xBix ternary alloys with 0≤ x≤ 2.46%, by using high resolution polarized Raman scattering measurement. Both InP-like and InBi-like optical vibration modes (LO) are identified in all the samples, suggesting that most of the Bi-atoms are incorporated into the lattice sites to substitute P-atoms. And the intensity of the InBi-like Raman mode is positively proportional to the Bi-content. Linear red-shift of the InP-like longitudinal optical vibration mode is observed to be 1.1 cm-1/Bi%, while that of the InP-like optical vibration overtone (2LO) is nearly doubled. In addition, through comparing the Z(XX)Z and Z(XY)Z Raman spectra, longitudinal-optical-plasmon-coupled (LOPC) modes are identified in all the samples, and their intensities are found to be proportional to the electron concentrations.

Key words: InPBi, Raman spectra, red-shift, LOPC modes

中图分类号:  (Phonons in crystal lattices)

  • 63.20.-e
63.20.kd (Phonon-electron interactions) 63.20.dd (Measurements)