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Title: Terahertz cascades from nanoparticles
Authors: Arnardottir, Kristin Bjorg
Liew, Timothy Chi Hin
Keywords: Nanoparticles
Terahertz Cascades
Issue Date: 2018
Source: Arnardottir, K. B., & Liew, T. C. H. (2018). Terahertz cascades from nanoparticles. Physical Review B, 97(19), 195446-. doi:10.1103/PhysRevB.97.195446
Series/Report no.: Physical Review B
Abstract: In this article we propose a system capable of terahertz (THz) radiation with quantum yield above unity. The system consists of nanoparticles where the material composition varies along the radial direction of each nanoparticle in such a way that a ladder of equidistant energy levels emerges. By then exciting the highest level of this ladder we produce multiple photons of the same frequency in the THz range. We demonstrate how we can calculate a continuous material composition profile that achieves a high quantum yield and then show that a more experimentally friendly design of a multishell nanoparticle can still result in a high quantum yield.
ISSN: 2469-9950
DOI: 10.1103/PhysRevB.97.195446
Schools: School of Physical and Mathematical Sciences 
Rights: © 2018 American Physical Society. This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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