Interadsorbate vibrational energy flow on stepped vicinal H/Si(111) surfaces

M. Morin, K. Kuhnke, P. Jakob, Y. J. Chabal, N. J. Levinos, Alex Harris

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We report direct measurements of the vibrational energy flow among Si-H stretching modes on hydrogen-terminated stepped vicinal Si(111) surfaces using a two-color, infrared pump/sum frequency generation probe scheme in which one vibrational mode is pumped and another one is probed. The results, which follow the vibrational energy equilibration, reveal that interadsorbate energy transfer from the terrace to the step can be the dominant relaxation channel of the terrace oscillators. Two types of surfaces have been examined. Both have monohydride terminated terraces, but one has monohydride and the other dihydride terminated steps. On the dihydride stepped surface, the terrace Si-H vibrational energy is drained by the short lifetime step modes. The energy flow on the dihydride terminated surface occurs between terrace-localized and step-localized modes and can be resolved into a kinetic model of the vibrational energy equilibration process. Stronger interadsorbate dipole couplings, on the monohydride stepped surface, delocalize the terrace and step modes and make it difficult to separate the energy flow from direct Si-H oscillators excitation. We suggest that on this surface there is a rapid equilibration of all the Si-H stretching modes followed by their collective decay. Estimates of dipole-dipole energy transfer rates are consistent with the kinetic model results and confirm the role of dipolar interactions in vibrational energy flow on the hydrogen-terminated silicon surfaces.

Original languageEnglish
Pages (from-to)11-21
Number of pages11
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume64-65
Issue numberC
DOIs
Publication statusPublished - Dec 12 1993

Fingerprint

dihydrides
dipoles
energy
Energy transfer
Hydrogen
Stretching
energy transfer
oscillators
Kinetics
kinetics
Silicon
hydrogen
vibration mode
Pumps
pumps
Color
Infrared radiation
color
life (durability)
probes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces

Cite this

Interadsorbate vibrational energy flow on stepped vicinal H/Si(111) surfaces. / Morin, M.; Kuhnke, K.; Jakob, P.; Chabal, Y. J.; Levinos, N. J.; Harris, Alex.

In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 64-65, No. C, 12.12.1993, p. 11-21.

Research output: Contribution to journalArticle

Morin, M. ; Kuhnke, K. ; Jakob, P. ; Chabal, Y. J. ; Levinos, N. J. ; Harris, Alex. / Interadsorbate vibrational energy flow on stepped vicinal H/Si(111) surfaces. In: Journal of Electron Spectroscopy and Related Phenomena. 1993 ; Vol. 64-65, No. C. pp. 11-21.
@article{fac033d386bc47039b0f3ae02a99c468,
title = "Interadsorbate vibrational energy flow on stepped vicinal H/Si(111) surfaces",
abstract = "We report direct measurements of the vibrational energy flow among Si-H stretching modes on hydrogen-terminated stepped vicinal Si(111) surfaces using a two-color, infrared pump/sum frequency generation probe scheme in which one vibrational mode is pumped and another one is probed. The results, which follow the vibrational energy equilibration, reveal that interadsorbate energy transfer from the terrace to the step can be the dominant relaxation channel of the terrace oscillators. Two types of surfaces have been examined. Both have monohydride terminated terraces, but one has monohydride and the other dihydride terminated steps. On the dihydride stepped surface, the terrace Si-H vibrational energy is drained by the short lifetime step modes. The energy flow on the dihydride terminated surface occurs between terrace-localized and step-localized modes and can be resolved into a kinetic model of the vibrational energy equilibration process. Stronger interadsorbate dipole couplings, on the monohydride stepped surface, delocalize the terrace and step modes and make it difficult to separate the energy flow from direct Si-H oscillators excitation. We suggest that on this surface there is a rapid equilibration of all the Si-H stretching modes followed by their collective decay. Estimates of dipole-dipole energy transfer rates are consistent with the kinetic model results and confirm the role of dipolar interactions in vibrational energy flow on the hydrogen-terminated silicon surfaces.",
author = "M. Morin and K. Kuhnke and P. Jakob and Chabal, {Y. J.} and Levinos, {N. J.} and Alex Harris",
year = "1993",
month = "12",
day = "12",
doi = "10.1016/0368-2048(93)80057-S",
language = "English",
volume = "64-65",
pages = "11--21",
journal = "Journal of Electron Spectroscopy and Related Phenomena",
issn = "0368-2048",
publisher = "Elsevier",
number = "C",

}

TY - JOUR

T1 - Interadsorbate vibrational energy flow on stepped vicinal H/Si(111) surfaces

AU - Morin, M.

AU - Kuhnke, K.

AU - Jakob, P.

AU - Chabal, Y. J.

AU - Levinos, N. J.

AU - Harris, Alex

PY - 1993/12/12

Y1 - 1993/12/12

N2 - We report direct measurements of the vibrational energy flow among Si-H stretching modes on hydrogen-terminated stepped vicinal Si(111) surfaces using a two-color, infrared pump/sum frequency generation probe scheme in which one vibrational mode is pumped and another one is probed. The results, which follow the vibrational energy equilibration, reveal that interadsorbate energy transfer from the terrace to the step can be the dominant relaxation channel of the terrace oscillators. Two types of surfaces have been examined. Both have monohydride terminated terraces, but one has monohydride and the other dihydride terminated steps. On the dihydride stepped surface, the terrace Si-H vibrational energy is drained by the short lifetime step modes. The energy flow on the dihydride terminated surface occurs between terrace-localized and step-localized modes and can be resolved into a kinetic model of the vibrational energy equilibration process. Stronger interadsorbate dipole couplings, on the monohydride stepped surface, delocalize the terrace and step modes and make it difficult to separate the energy flow from direct Si-H oscillators excitation. We suggest that on this surface there is a rapid equilibration of all the Si-H stretching modes followed by their collective decay. Estimates of dipole-dipole energy transfer rates are consistent with the kinetic model results and confirm the role of dipolar interactions in vibrational energy flow on the hydrogen-terminated silicon surfaces.

AB - We report direct measurements of the vibrational energy flow among Si-H stretching modes on hydrogen-terminated stepped vicinal Si(111) surfaces using a two-color, infrared pump/sum frequency generation probe scheme in which one vibrational mode is pumped and another one is probed. The results, which follow the vibrational energy equilibration, reveal that interadsorbate energy transfer from the terrace to the step can be the dominant relaxation channel of the terrace oscillators. Two types of surfaces have been examined. Both have monohydride terminated terraces, but one has monohydride and the other dihydride terminated steps. On the dihydride stepped surface, the terrace Si-H vibrational energy is drained by the short lifetime step modes. The energy flow on the dihydride terminated surface occurs between terrace-localized and step-localized modes and can be resolved into a kinetic model of the vibrational energy equilibration process. Stronger interadsorbate dipole couplings, on the monohydride stepped surface, delocalize the terrace and step modes and make it difficult to separate the energy flow from direct Si-H oscillators excitation. We suggest that on this surface there is a rapid equilibration of all the Si-H stretching modes followed by their collective decay. Estimates of dipole-dipole energy transfer rates are consistent with the kinetic model results and confirm the role of dipolar interactions in vibrational energy flow on the hydrogen-terminated silicon surfaces.

UR - http://www.scopus.com/inward/record.url?scp=4243838838&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4243838838&partnerID=8YFLogxK

U2 - 10.1016/0368-2048(93)80057-S

DO - 10.1016/0368-2048(93)80057-S

M3 - Article

AN - SCOPUS:4243838838

VL - 64-65

SP - 11

EP - 21

JO - Journal of Electron Spectroscopy and Related Phenomena

JF - Journal of Electron Spectroscopy and Related Phenomena

SN - 0368-2048

IS - C

ER -