SURFACE-ENHANCED HYPER-RAMAN SCATTERING (SEHRS) AND SURFACE-ENHANCED RAMAN-SCATTERING (SERS) BY MEANS OF MODE-LOCKED TI - SAPPHIRE LASER EXCITATION

被引：38

作者：

KNEIPP, H

KNEIPP, K

SEIFERT, F

机构：

[1] FREE UNIV BERLIN,DEPT PHYS,W-1000 BERLIN 33,GERMANY

[2] MAX BORN INST NICHTLINEARE OPT & KURZZEITPHYS,O-1199 BERLIN,GERMANY

来源：

CHEMICAL PHYSICS LETTERS | 1993年 / 212卷 / 3-4期

关键词：

D O I：

10.1016/0009-2614(93)89340-N

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Surface-enhanced hyper-Raman scattering (SEHRS) and surface-enhanced Raman scattering (SERS) using mode-locked Ti: sapphire laser excitation is reported. SEHRS and SERS from crystal violet molecules on colloidal silver were measured using 1 ps laser pulses (82 MHz repetition rate, 1.2 W average power) at 800 nm wavelength excitation. This 800 nm excitation allowed simultaneous observation of SEHRS and SERS and a direct comparison of surface-enhancement factors for Raman scattering and hyper-Raman scattering. The ratio between the surface-enhancement factors of SERS and SEHRS for crystal violet on colloidal silver could be explained by different electromagnetic-enhancement conditions for both effects. No evidence exists of different chemical contributions to SERS and SEHRS for this molecule.

引用

页码：374 / 378

页数：5

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