2014 Fiscal Year Final Research Report
Study of Plasmon-enhanced Photoelectron-excitaion in Nanosscale Cavity
| Project/Area Number |
23540373
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Condensed matter physics I
|
|---|
| Research Institution | Kyushu Institute of Technology |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2011-04-28 – 2015-03-31
|
| Keywords | 局所光電子放出 / STM / 空気中光電子分光 / ナノスケール / プラズモン / プラズモン共鳴 / ニアフィールド / SPR |
|---|
| Outline of Final Research Achievements |
Basic research for nano scale material analysis has been carried out to establish local photoemission and optical reflection on a nanoscale. The electromagnetic field enhancement in a small cavity of STM has been utilized to detect the enhanced signal in a nano scale are. Firstly, the photo-excited current can be detected by STM, where the material in the STM tunnel junction is excited by laser beam. We have studied the photo-excitation in the electromagnetic cavity of STM surrounded by STM tip and noble metal sample using pulse laser with high photon density. We have measured the current as a function of the gap distance between STM tip and sample(~1-2nm) with various power of incident laser up to 30mW. We obtained the current change as a function of gap distance, which is different from the current change in ordinary STM tunneling current.
|
| Free Research Field |
表面科学
|
