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A Fully Verified Theoretical Analysis of Strain-Photonic Coupling for Quantum Well Embedded in Wavy Nanoribbons

Abstract

For optoelectronic devices, an attractive research field involves the flexible adjustment of the band gap in the semiconductor quantum well (QW) structures by strain-engineering. However, rigid wafer-based technology enables lattice-misfit strain during epitaxial growth, which is biaxial, unchangeable, and not sufficient for the devices fitted on various irregular surfaces. Therefore, exploiting the strain produced by externally deformed configurations offers unique opportunities to continuously and non-defectively tune the QW’s band structure. Here, we propose a strategy to induce uniaxial distributed strain in the elaborately-designed wavy quantum well nanoribbon (QWNR). Meanwhile, a numerically solved strain-photonic coupling model based on the theory of elasticity and eight-band k·p method is established to illustrate the strain distribution coupled with the strain-induced band gap shift of the wavy QWNR. The μ-photoluminescence measurements reveal a periodically varied band gap in the QW along the uniaxial tensile direction, which is consistent with the result of theoretical calculations. This model demonstrates the potential applications for a wrinkling configuration to arbitrarily control and tune the band gap and thus the optoelectronic performances of quantum well systems.

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Publication details

The article was received on 08 Mar 2018, accepted on 31 May 2018 and first published on 01 Jun 2018


Article type: Paper
DOI: 10.1039/C8NR01937A
Citation: Nanoscale, 2018, Accepted Manuscript
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    A Fully Verified Theoretical Analysis of Strain-Photonic Coupling for Quantum Well Embedded in Wavy Nanoribbons

    J. Zhang, Y. Xu, Y. Jiang, L. Bai, H. Chen, J. Li, L. Wang, W. Wu and G. Song, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR01937A

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