Chin. Phys. Lett.  2009, Vol. 26 Issue (2): 027101    DOI: 10.1088/0256-307X/26/2/027101
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Long Lifetime State of Shallow Donor Centres for Silicon Based THz Sources
YU Chen-Hui1,2, ZHANG Bo1, CHEN Chang-Qing2, YU Li-Bo3, LU Wei1, SHEN Xue-Chu1
1National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 2000832Wuhan National Laboratory for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 4300743Department of photoelectric devices, Southwest Institute of Technical Physics, Chengdu 610041
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YU Chen-Hui, ZHANG Bo, CHEN Chang-Qing et al  2009 Chin. Phys. Lett. 26 027101
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Abstract Impurity centres in high purity silicon with ionization energies 38.32 and 40.09meV are observed by photo-thermal ionization spectroscopy measurements. Their typical shallow donor characteristics are approved by good agreement with theoretic evaluation under varying magnetic fields. The 2p0 state lifetime of one donor centres are more than 3 times longer than that of phosphorus in the same silicon sample. Compared to phosphorus which has been already successfully exploited to produce silicon-based THz radiations, this shallow donor centre has a pronounced enhancement on lifetime and quality factor of population inversion level. Hence, silicon with this donor centre would be a potential excellent candidate to develop improved silicon-based THz sources.
Keywords: 71.55.Cn      71.70.Ej      78.30.Am     
Received: 01 September 2008      Published: 20 January 2009
PACS:  71.55.Cn (Elemental semiconductors)  
  71.70.Ej (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)  
  78.30.Am (Elemental semiconductors and insulators)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/26/2/027101       OR      https://cpl.iphy.ac.cn/Y2009/V26/I2/027101
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YU Chen-Hui
ZHANG Bo
CHEN Chang-Qing
YU Li-Bo
LU Wei
SHEN Xue-Chu

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