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  Creating femtosecond-laser-hyperdoped silicon with a homogeneous doping profile

Lin, Y. T., Mangan, N., Marbach, S., Schneider, T., Deng, G., & Zhou, S. (2015). Creating femtosecond-laser-hyperdoped silicon with a homogeneous doping profile. Applied Physics Letters, 106(6): 062105. doi:10.1063/1.4907988.

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 Creators:
Lin, Y. T., Author
Mangan, N., Author
Marbach, S., Author
Schneider, Tobias1, Author           
Deng, G., Author
Zhou, S., Author
Affiliations:
1Max Planck Research Group Emerging Complexity in Physical Systems, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063294              

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 Abstract: Femtosecond-laser hyperdoping of sulfur in silicon typically produces a concentration gradient that results in undesirable inhomogeneous material properties. Using a mathematical model of the doping process, we design a fabrication method consisting of a sequence of laser pulses with varying sulfur concentrations in the atmosphere, which produces hyperdoped silicon with a uniform concentration depth profile. Our measurements of the evolution of the concentration profiles with each laser pulse are consistent with our mathematical model of the doping mechanism, based on classical heat and solute diffusion coupled to the far-from-equilibrium dopant incorporation. The use of optimization methods opens an avenue for creating controllable hyperdoped materials on demand.

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Language(s): eng - English
 Dates: 2015-02-112015-02-09
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: BibTex Citekey: lin_apl_2015
DOI: 10.1063/1.4907988
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Title: Applied Physics Letters
Source Genre: Journal
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Pages: 5 Volume / Issue: 106 (6) Sequence Number: 062105 Start / End Page: - Identifier: ISSN: 0003-6951