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Optically excited near-surface phonons of (110) observed by fourth-order coherent Raman spectroscopy
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10.1063/1.3207947
/content/aip/journal/jcp/131/8/10.1063/1.3207947
http://aip.metastore.ingenta.com/content/aip/journal/jcp/131/8/10.1063/1.3207947

Figures

Image of FIG. 1.
FIG. 1.

(a) Experimental setup for the fourth-order and third-order optical responses. (b) Sample orientation and input polarization.

Image of FIG. 2.
FIG. 2.

Intensity changes in the reflected SH light from the TMA-covered (110) with (a) [001]pp, (g) , (m) [001]sp, and (s) geometries. The quantum beat component that was left after subtraction of the fitting curve for (b) [001]pp, (h) , (n) [001]sp, and (t) . FT spectra of the modulated component of SHG with (c) [001]pp, (i) , (o) [001]sp, and (u) . Intensity change in the fundamental light reflection for (d) [001]pp, (j) , (p) [001]sp, and (v) . The quantum beat component that was left after subtraction of the fitting curve for (e) [001]pp, (k) , (q) [001]sp, and (w) . FT spectra of modulated component of reflection, (f) [001]pp, (l) , (r) [001]sp, and (x) . Asterisks in (x) represent artifacts derived from laser instability.

Image of FIG. 3.
FIG. 3.

Atomic displacements of the corresponding bulk phonon modes of the observed surface modes after Ref. 22. (a) (TO: ) mode that was observed as mode at . (b) One of (TO: ) modes that corresponds to mode observed at . (c) One of (LO: ) modes observed as mode at . (d) One of (LO: ) modes observed as mode at . (e) One of (TO: ) modes observed as mode at . (f) mode observed as mode at . (g) One of (LO: ) modes.

Tables

Generic image for table
Table I.

Fitting parameters of FR spectra of the (110) surface covered by TMA with irradiation azimuth to (a) [001] direction with -pump and -probe, (b) [001] direction with -pump and -probe, (c) direction with -pump and -probe, and (d) direction with -pump and -probe.

Generic image for table
Table II.

Fitting parameters of spectra of the (110) surface covered by TMA.

Generic image for table
Table III.

Correspondences of original irreducible representations of (bulk ), irreducible representations of [ (110) surface], and possible pump polarizations.

Generic image for table
Table IV.

Frequency and assignment of phonon modes observed in (a) fourth-order spectra and (b) third-order spectra.

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/content/aip/journal/jcp/131/8/10.1063/1.3207947
2009-08-24
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Optically excited near-surface phonons of TiO2 (110) observed by fourth-order coherent Raman spectroscopy
http://aip.metastore.ingenta.com/content/aip/journal/jcp/131/8/10.1063/1.3207947
10.1063/1.3207947
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