Optical phonon modes of CdSe quantum dots in a glass matrix

Young Nam Hwang; Sang Cheon Kim; Seung Han Park; Ung Kim; Dongho Kim

Optical phonon modes of CdSe quantum dots in a glass matrix

Young Nam Hwang, Sang Cheon Kim, Seung Han Park, Ung Kim, Dongho Kim

Research output: Contribution to conference › Paper › peer-review

Abstract

The major mechanisms of Raman broadening of phonon modes are discussed based on the phonon relaxation at the boundary of nanocrystals. The negative phonon dispersion is compensated by the lattice contraction for the longitudinal phonons which results in an almost constant Raman shift. However, the surface phonon frequency is rapidly increased with decreasing quantum dot size which originates from the constructive coupling of positive phonon dispersion and lattice contraction.

Original language	English
Pages	95-96
Number of pages	2
Publication status	Published - 1997
Event	Proceedings of the 1997 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim - Chiba, Jpn Duration: 1997 Jul 14 → 1997 Jul 18

Other

Other	Proceedings of the 1997 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim
City	Chiba, Jpn
Period	97/7/14 → 97/7/18

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

Cite this

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title = "Optical phonon modes of CdSe quantum dots in a glass matrix",

abstract = "The major mechanisms of Raman broadening of phonon modes are discussed based on the phonon relaxation at the boundary of nanocrystals. The negative phonon dispersion is compensated by the lattice contraction for the longitudinal phonons which results in an almost constant Raman shift. However, the surface phonon frequency is rapidly increased with decreasing quantum dot size which originates from the constructive coupling of positive phonon dispersion and lattice contraction.",

author = "Hwang, {Young Nam} and Kim, {Sang Cheon} and Park, {Seung Han} and Ung Kim and Dongho Kim",

year = "1997",

language = "English",

pages = "95--96",

note = "Proceedings of the 1997 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim ; Conference date: 14-07-1997 Through 18-07-1997",

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TY - CONF

T1 - Optical phonon modes of CdSe quantum dots in a glass matrix

AU - Hwang, Young Nam

AU - Kim, Sang Cheon

AU - Park, Seung Han

AU - Kim, Ung

AU - Kim, Dongho

PY - 1997

Y1 - 1997

N2 - The major mechanisms of Raman broadening of phonon modes are discussed based on the phonon relaxation at the boundary of nanocrystals. The negative phonon dispersion is compensated by the lattice contraction for the longitudinal phonons which results in an almost constant Raman shift. However, the surface phonon frequency is rapidly increased with decreasing quantum dot size which originates from the constructive coupling of positive phonon dispersion and lattice contraction.

AB - The major mechanisms of Raman broadening of phonon modes are discussed based on the phonon relaxation at the boundary of nanocrystals. The negative phonon dispersion is compensated by the lattice contraction for the longitudinal phonons which results in an almost constant Raman shift. However, the surface phonon frequency is rapidly increased with decreasing quantum dot size which originates from the constructive coupling of positive phonon dispersion and lattice contraction.

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UR - http://www.scopus.com/inward/citedby.url?scp=0030714427&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:0030714427

SP - 95

EP - 96

T2 - Proceedings of the 1997 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim

Y2 - 14 July 1997 through 18 July 1997

ER -

Optical phonon modes of CdSe quantum dots in a glass matrix

Abstract

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All Science Journal Classification (ASJC) codes

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