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Chin. Phys. B, 2016, Vol. 25(6): 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)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 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
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.

Keywords:  InPBi      Raman spectra      red-shift      LOPC modes  
Received:  28 January 2016      Revised:  07 March 2016      Accepted manuscript online: 
PACS:  63.20.-e (Phonons in crystal lattices)  
  63.20.kd (Phonon-electron interactions)  
  63.20.dd (Measurements)  
Fund: 

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).

Corresponding Authors:  Kai-You Wang     E-mail:  kywang@semi.ac.cn

Cite this article: 

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) Bismuth-content-dependent polarized Raman spectrum of InPBi alloy 2016 Chin. Phys. B 25 066301

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