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题名: Optical-phonon modes and Frohlich potential in quantum dots
作者: Lu DY;  Zhu BF
发表日期: 2000
摘要: By extending the microscopic dipole model on optical-phonon modes as applied in quantum wells and quantum wires, to rectangular quantum dots (QD), optical phonon modes and their accompanying Frohlich potentials in QD are calculated and classified. When the bulk phonon dispersion is ignored, the optical phonon modes in QD can be clearly divided into the confined LO- and TO-bulk-like modes and the extended interface-like modes. Among the interface-like modes, a special attention is given to the corner modes, whose anisotropic behavior is depicted in the long wavelength limit. Based on the numerical results, a set of analytical formula are proposed to approximately describe the bulk-like modes, for which both the optical displacements and Frohlich potentials vanish at the interfaces. (C) 2000 Elsevier Science Ltd. All rights reserved.
KOS主题词: Nanostructured materials;  Semiconductors;  Phonons;  metallic superlattices;  Relaxation;  Wire rope
刊名: SOLID STATE COMMUNICATIONS
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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推荐引用方式:
Lu DY; Zhu BF .Optical-phonon modes and Frohlich potential in quantum dots ,SOLID STATE COMMUNICATIONS,2000,115(6):313-317
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