Optimizing the top profile of a nanowire for maximum forward emission

doi:10.1088/1674-1056/20/11/116102

Abstract The optimal top structure of a nanowire quantum emitter single photon source is significant in improving performance. Based on the axial symmetry of a cylindrical nanowire, this paper optimizes the top profile of a nanowire for the maximum forward emission by combining the geometry projection method and the finite element method. The results indicate that the nanowire with a cambered top has the stronger emission in the forward direction, which is helpful to improve the photon collection efficiency.

Keywords: nanowire photon collection

Received: 05 May 2011
Revised: 03 June 2011
Accepted manuscript online:

PACS:	61.46.Km	(Structure of nanowires and nanorods (long, free or loosely attached, quantum wires and quantum rods, but not gate-isolated embedded quantum wires))
	78.67.Uh	(Nanowires)

Fund: Project supported by the National High Technology Research and Development Program of China (Grant No. 2009AA03Z405), the National Natural Science Foundation of China (Grant Nos. 60971068, 60908028, and 10979065), the Fundamental Research Funds for the Central Universities of China (Grant No. BUPT2009RC0411), Program for New Century Excellent Talents in University of China (Grant No. NTCE-10-0261), and the Chinese Universities Scientific Fund (Grant No. 2011RC0402).

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Wang Dong-Lin(王东林), Yu Zhong-Yuan(俞重远), Liu Yu-Min(刘玉敏), Guo Xiao-Tao(郭晓涛), Cao Gui(曹贵), and Feng Hao(冯昊) Optimizing the top profile of a nanowire for maximum forward emission 2011 Chin. Phys. B 20 116102

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