中国物理B ›› 2017, Vol. 26 ›› Issue (7): 78801-078801.doi: 10.1088/1674-1056/26/7/078801
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
Feng Yang(杨丰), Yinglu Ji(纪英露), Xiao Zhang(张霄), Qingxia Fan(范庆霞), Nan Zhang(张楠), Xiaogang Gu(谷孝刚), Zhuojian Xiao(肖卓建), Qiang Zhang(张强), Yanchun Wang(王艳春), Xiaochun Wu(吴晓春), Junjie Li(李俊杰), Weiya Zhou(周维亚)
Feng Yang(杨丰)1,3,4, Yinglu Ji(纪英露)2, Xiao Zhang(张霄)1,4, Qingxia Fan(范庆霞)1,4, Nan Zhang(张楠)1,4, Xiaogang Gu(谷孝刚)1,3,4, Zhuojian Xiao(肖卓建)1,3,4, Qiang Zhang(张强)1,4, Yanchun Wang(王艳春)1,3, Xiaochun Wu(吴晓春)2,4, Junjie Li(李俊杰)1, Weiya Zhou(周维亚)1,3,4
摘要:
We provide an effective method to investigate the field gradient effect in nanoconfined plasmon–matter interaction. Aligned ultralong SWNTs without defects were grown on marked substrates, followed by assembling gold nanoparticle clusters around individual nanotubes. The Raman scattering behavior of a nanotube placed in an atomic scale nanogap between adjacent nanoparticles was studied. In addition to the expected plasmon-induced Raman enhancement up to 103, the defect-free D-mode of an individual SWNT induced by gradient field is found for the first time. When the light is confined at atomic scale, gradient field Raman scattering becomes significant and dipole-forbidden phonon modes can be activated by quadrupole Raman tensor variation, indicating breakdown of the Raman selection rules.
中图分类号: (Carbon nanotubes)