Survey of plasmonic gaps tuned at sub-nanometer scale in self-assembled arrays  

作　　者：Li-Hua Qian Li-Zhi Yi Gui-Sheng Wang Chao Zhang Song-Liu Yuan 

机构地区：[1]School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China [2]Flexible Electronics Center, Huazhong University of Science and Technology, Wuhan 430074, China

出　　处：《Frontiers of physics》2016年第2期57-65,共9页物理学前沿（英文版）

摘　　要：Creating nanoscale and sub-nanometer gaps between noble metal nanoparticles is critical for the applications of plasmonics and nanophotonics. To realize simultaneous attainments of both the op- tical spectrum and the gap size, the ability to tune these nanoscale gaps at the sub-nanometer scale is particularly desirable. Many nanofabrication methodologies, including electron beam lithography, self-assembly, and focused ion beams, have been tested for creating nanoscale gaps that can de- liver significant field enhancement. Here, we survey recent progress in both the reliable creation of nanoscale gaps in nanoparticle arrays using self-assemblies and in the in-situ tuning techniques at the sub-nanometer scale. Precisely tunable gaps, as we expect, will be good candidates for future investigations of surface-enhanced Raman scattering, non-linear optics, and quantum plasmonics.Creating nanoscale and sub-nanometer gaps between noble metal nanoparticles is critical for the applications of plasmonics and nanophotonics. To realize simultaneous attainments of both the op- tical spectrum and the gap size, the ability to tune these nanoscale gaps at the sub-nanometer scale is particularly desirable. Many nanofabrication methodologies, including electron beam lithography, self-assembly, and focused ion beams, have been tested for creating nanoscale gaps that can de- liver significant field enhancement. Here, we survey recent progress in both the reliable creation of nanoscale gaps in nanoparticle arrays using self-assemblies and in the in-situ tuning techniques at the sub-nanometer scale. Precisely tunable gaps, as we expect, will be good candidates for future investigations of surface-enhanced Raman scattering, non-linear optics, and quantum plasmonics.

关 键 词：surface plasmon tunable plasmonic gap quantum plasmon surface-enhanced Raman scattering SELF-ASSEMBLY nanoparticle array 

分 类 号：TB383[一般工业技术—材料科学与工程] TN32[电子电信—物理电子学]