Optical vibrational states of diamond nanocrsytals

Author

Serrano, F.A. ; De Rivera, L. Niño ; Ponomaryov, V. ; Cruz-Irisson, M.

Author_Institution

ESIME-Culhuacan, Inst. Politec. Nac., Mexico City, Mexico

fYear

2009

fDate

2-5 Aug. 2009

Firstpage

864

Lastpage

868

Abstract

The phonon band structure and Raman response of diamond nanowires are calculated by means of the Born potential, including central and non-central interatomic forces, and a supercell model. The Raman scattering is studied by means of the local bond-polarization model based on the displacement-displacement Green´s function within the linear response theory. Free standing, infinitely long and homogeneous quantum wires cross sections with the wire axis along the [001] direction are considered. The results show an important shift of the main Raman peak (highest optical mode) towards lower energies, in comparison with the bulk crystalline diamond case.

Keywords

Green´s function methods; Raman spectra; diamond; elemental semiconductors; nanowires; phonons; semiconductor quantum wires; Born potential; C; Raman response; Raman scattering; [001] direction; central interatomic forces; diamond nanocrsytals; diamond nanowires; displacement-displacement Green´s function; linear response theory; local bond-polarization model; noncentral interatomic forces; optical vibrational states; phonon band structure; quantum wires; supercell model; Atomic measurements; Biomedical optical imaging; Bonding; Diamond-like carbon; Green´s function methods; Nanowires; Optical scattering; Phonons; Raman scattering; Uncertainty; Diamond; Nanocrystals; Raman scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2009. MWSCAS '09. 52nd IEEE International Midwest Symposium on

Conference_Location

Cancun

ISSN

1548-3746

Print_ISBN

978-1-4244-4479-3

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2009.5235903

Filename

5235903