Coherent phonon dynamics in micro- and nanocrystalline diamond

被引：17

作者：

Kozak, M. ^{[1
]}

Trojanek, F. ^{[1
]}

Galar, P. ^{[1
]}

Varga, M. ^{[2
,3
]}

Kromka, A. ^{[2
]}

Maly, P. ^{[1
]}

机构：

[1] Charles Univ Prague, Fac Math & Phys, CR-12116 Prague 2, Czech Republic

[2] Inst Phys ASCR Vvi, Prague 16200 6, Czech Republic

[3] FEI STU, Inst Elect & Photon, SK-81219 Bratislava, Slovakia

来源：

OPTICS EXPRESS | 2013年 / 21卷 / 25期

关键词：

LIGHT-SCATTERING; RAMAN; DECAY; DEFECTS;

D O I：

10.1364/OE.21.031521

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on the time-resolved coherent anti-Stokes Raman spectroscopy of phonon dephasing in micro-and nanocrystalline diamond films. The dephasing times T-2 were found to be dependent on the morphology of diamond films (average size of crystals and content of nondiamond carbon phase) and changed from 0.7 to 1.72 ps. The dephasing times were found to be temperature independent in the range 10-295 K. In addition to diamond Raman active phonon mode at 1332 cm(-1), we investigated also the dynamics of a broad Raman peak at 1530 cm(-1) which is present in samples with higher content of nondiamond sp(2) hybridized carbon phase. This peak was found to be homogenously broadened with very fast dephasing (T-2 similar to 50 fs). (C) 2013 Optical Society of America

引用

页码：31521 / 31529

页数：9

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