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2010 Volume 26 Issue 1
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2010: The Influence of Cap and Defect Layer on Interface Optical-Phonon Modes in Finite Superlattices, Chinese Physics Letters, 27(1): 194-197.
Citation: 2010: The Influence of Cap and Defect Layer on Interface Optical-Phonon Modes in Finite Superlattices, Chinese Physics Letters, 27(1): 194-197.
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The Influence of Cap and Defect Layer on Interface Optical-Phonon Modes in Finite Superlattices

  • institute of mathematics and physics, College of Science, Central South University of Forestry & Technology, Changsha 410004;

  • Institute ofmathematics and physics,College ofScience,Central South University ofForestry& Technology,Changsha 410004

  • Employing the transfer matrix method, we investigate the property of the interface optical-phonon modes (IOPMs) in a finite superlattice with a cap layer and a structural defect layer in the dielectric continuum approximation. In the present structure, there exist two types of defect IOPMs: localized modes and surface modes. The evolution of extended, localized and surface IOPMs can be clearly tracked with the thickness of the defect or cap layer. In some cases, degeneracy between surface IOPMs may occur, but the conservation of the total number of the IOPMs is always kept for every value of the transversal wave number. These results show that the spectra of these localized or surface IOPMs can be engineered by adjusting structural parameters.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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The Influence of Cap and Defect Layer on Interface Optical-Phonon Modes in Finite Superlattices

Abstract: Employing the transfer matrix method, we investigate the property of the interface optical-phonon modes (IOPMs) in a finite superlattice with a cap layer and a structural defect layer in the dielectric continuum approximation. In the present structure, there exist two types of defect IOPMs: localized modes and surface modes. The evolution of extended, localized and surface IOPMs can be clearly tracked with the thickness of the defect or cap layer. In some cases, degeneracy between surface IOPMs may occur, but the conservation of the total number of the IOPMs is always kept for every value of the transversal wave number. These results show that the spectra of these localized or surface IOPMs can be engineered by adjusting structural parameters.

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