Piezoelectricity-induced terahertz photon absorption by confined acoustic phonons in wurtzite CdSe nanocrystals

Tzu Ming Liu, Meng Ju Yang, Chih Wei Lai, Pi Tai Chou, Ming Hao Chang, Hsiang Lin Liu, Chi Kuang Sun

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We report here the observation of piezoelectricity-induced terahertz photon absorption related to confined acoustic phonons in nanoparticles. Terahertz photon inactive (l=0) breathing modes become terahertz photon active in wurtzite CdSe nanocrystals due to the piezoelectric coupling. Obvious absorption peaks related to (l=0) modes appeared in the terahertz absorption spectra and the frequency of the peaks were inversely proportional to the size of the CdSe nanocrystals. This piezoelectrically coupled electric vibration provides a mechanism for low-dimensional systems to convert a terahertz photon into a phonon of the same frequency.

Original languageEnglish
Article number085428
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number8
DOIs
Publication statusPublished - 2008 Feb 26

Fingerprint

piezoelectricity
Piezoelectricity
Phonons
wurtzite
Nanocrystals
nanocrystals
phonons
Photons
Acoustics
acoustics
photons
breathing
Absorption spectra
Nanoparticles
absorption spectra
vibration
nanoparticles

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Piezoelectricity-induced terahertz photon absorption by confined acoustic phonons in wurtzite CdSe nanocrystals. / Liu, Tzu Ming; Yang, Meng Ju; Lai, Chih Wei; Chou, Pi Tai; Chang, Ming Hao; Liu, Hsiang Lin; Sun, Chi Kuang.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 77, No. 8, 085428, 26.02.2008.

Research output: Contribution to journalArticle

Liu, Tzu Ming ; Yang, Meng Ju ; Lai, Chih Wei ; Chou, Pi Tai ; Chang, Ming Hao ; Liu, Hsiang Lin ; Sun, Chi Kuang. / Piezoelectricity-induced terahertz photon absorption by confined acoustic phonons in wurtzite CdSe nanocrystals. In: Physical Review B - Condensed Matter and Materials Physics. 2008 ; Vol. 77, No. 8.
@article{ccc266d7d88c4577a67b44a0f52465ff,
title = "Piezoelectricity-induced terahertz photon absorption by confined acoustic phonons in wurtzite CdSe nanocrystals",
abstract = "We report here the observation of piezoelectricity-induced terahertz photon absorption related to confined acoustic phonons in nanoparticles. Terahertz photon inactive (l=0) breathing modes become terahertz photon active in wurtzite CdSe nanocrystals due to the piezoelectric coupling. Obvious absorption peaks related to (l=0) modes appeared in the terahertz absorption spectra and the frequency of the peaks were inversely proportional to the size of the CdSe nanocrystals. This piezoelectrically coupled electric vibration provides a mechanism for low-dimensional systems to convert a terahertz photon into a phonon of the same frequency.",
author = "Liu, {Tzu Ming} and Yang, {Meng Ju} and Lai, {Chih Wei} and Chou, {Pi Tai} and Chang, {Ming Hao} and Liu, {Hsiang Lin} and Sun, {Chi Kuang}",
year = "2008",
month = "2",
day = "26",
doi = "10.1103/PhysRevB.77.085428",
language = "English",
volume = "77",
journal = "Physical Review B - Condensed Matter and Materials Physics",
issn = "1098-0121",
number = "8",

}

TY - JOUR

T1 - Piezoelectricity-induced terahertz photon absorption by confined acoustic phonons in wurtzite CdSe nanocrystals

AU - Liu, Tzu Ming

AU - Yang, Meng Ju

AU - Lai, Chih Wei

AU - Chou, Pi Tai

AU - Chang, Ming Hao

AU - Liu, Hsiang Lin

AU - Sun, Chi Kuang

PY - 2008/2/26

Y1 - 2008/2/26

N2 - We report here the observation of piezoelectricity-induced terahertz photon absorption related to confined acoustic phonons in nanoparticles. Terahertz photon inactive (l=0) breathing modes become terahertz photon active in wurtzite CdSe nanocrystals due to the piezoelectric coupling. Obvious absorption peaks related to (l=0) modes appeared in the terahertz absorption spectra and the frequency of the peaks were inversely proportional to the size of the CdSe nanocrystals. This piezoelectrically coupled electric vibration provides a mechanism for low-dimensional systems to convert a terahertz photon into a phonon of the same frequency.

AB - We report here the observation of piezoelectricity-induced terahertz photon absorption related to confined acoustic phonons in nanoparticles. Terahertz photon inactive (l=0) breathing modes become terahertz photon active in wurtzite CdSe nanocrystals due to the piezoelectric coupling. Obvious absorption peaks related to (l=0) modes appeared in the terahertz absorption spectra and the frequency of the peaks were inversely proportional to the size of the CdSe nanocrystals. This piezoelectrically coupled electric vibration provides a mechanism for low-dimensional systems to convert a terahertz photon into a phonon of the same frequency.

UR - http://www.scopus.com/inward/record.url?scp=40849087985&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=40849087985&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.77.085428

DO - 10.1103/PhysRevB.77.085428

M3 - Article

VL - 77

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

SN - 1098-0121

IS - 8

M1 - 085428

ER -