Electronic manipulation of near-field nanofocusing in few-layer graphene-based hybrid nanotips

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2019,（7）
• 页码范围: 78-82
• 页数: 5页
• 语种: 英文
• DOI: 10.3788/COL201917.072501

摘要

In this Letter,we propose the electronic manipulation of localized surface plasmon resonance for active tuning in near-field nanofocusing.We theoretically studied the excited graphene tuning of the nanofocusing field in few layer graphene (FLG)-based hybrid nanotips.It is revealed that the normalized enhanced electric field can be significantly promoted to more than 300 times.It is also observed that resonant peaks can be unprecedently modified by the electron state of excited graphene that is embedded in the substrate.It shows the possibility of flexible tuning of plasmon resonances via controlling the electron excitation state of graphene for specific advanced near-field nanofocusing applications.