| Title | A Near-field Nanosource Based on Surface Plasmon Bragg Reflectors and Nanocavity |
| Authors | Wang, Qingyan Gong, Qihuang Wang, Jia Zhang, Shulian |
| Affiliation | Peking Univ, State Key Lab Mesoscop Phys, Sch Phys, Beijing 100871, Peoples R China. Tsinghua Univ, Dept Precis Instruments, Beijing 100084, Peoples R China. |
| Keywords | Surface plasmon polaritons Near-field microscopy Nanocavity Nanosource POLARITONS |
| Issue Date | 2010 |
| Publisher | plasmonics |
| Citation | PLASMONICS.2010,5,(2),199-205. |
| Abstract | We demonstrate a type of confined nanosource based on surface plasmon band-gap structure consisting of a nanocavity surrounded by grooves. A single, localized, and non-radiating central peak is obtained and can be used as a nanosource. The characteristics of the surface plasmon polariton (SPP) field in the vicinity of the structures with different geometrical parameters are investigated experimentally. A confined central peak is obtained in the nanocavity. The full width at half maximum of the central peak is beyond the diffraction limit and changes little during 600 nm distance away from the sample surface. With the modifications of the geometrical parameters, the central peak intensity can be enhanced and the sidelobes can be suppressed. The physical origin of the enhancement and the surface-sensitivity is explored theoretically. These phenomena demonstrate the abilities of the structures to collect the electromagnetic field and to tailor the SPP field profile. This type of SPP-based nanosource is promising to be applied in near-field imaging, data storage, optical manipulation, and localized spectrum excitation, and has potential applications in nano-photonics devices based on SPPs. |
| URI | http://hdl.handle.net/20.500.11897/148731 |
| ISSN | 1557-1955 |
| DOI | 10.1007/s11468-010-9134-y |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 人工微结构和介观物理国家重点实验室 |
